April marks a transition between winter and summer for most of the country but for Denver it is especially true as we can see a stunning variety of weather.
The proverbial April showers are certainly a possibility for Denver. Snow? Tornadoes? Thunderstorms? You bet – all can happen!
For good measure throw in a chance for hail and even dust storms and April gives every type of weather condition you could like – or hate.
Satellite imagery provides bird’s eye view of Earth at the change of seasons.
Pretty neat imagery and explanation from NASA:
Enjoy the Equinox!
Every year, there are two equinoxes. One is in March; the other is in September. In 2014, the March equinox falls on March 20, 2014. On the equinoxes, the sun shines directly on the equator and the length of day and night is nearly equal. Seasons are opposite on either side of the equator, so the March equinox is called the spring (or vernal) equinox in the northern hemisphere. But in the southern hemisphere, it’s known as the fall (autumnal) equinox. What do equinoxes look like from space? The Spinning Enhanced Visible and Infrared Imager (SEVIRI) on EUMETSAT’s Meteosat-9 captured these four views of Earth from geosynchronous orbit. The images show how sunlight fell on the Earth on December 21, 2010 (upper left), and March 20 (upper right), June 21 (lower left), and September 20, 2011 (lower right). Each image was taken at 6:12 a.m. local time. Notice how on March 20 and September 20, the terminator — the divide between day and night — is a straight north-south line, and the Sun is said to sit directly above the equator. Equinox means “equal night” in Latin, capturing the idea that daytime and nighttime are equal lengths everywhere on the planet.
Read more about the equinoxes and solstices at
http://
See a video of the equinoxes and solstices from space at
http://www.youtube.com/
Read more about the March Equinox from Date and Time at
http://
Like all months in Colorado, February 2014 did have some warm periods but those were few and far between as compared to the cold we experienced. Those cold temperatures did not translate to precipitation however.
The month started out quite cold with 9 out of the first 10 days seeing below normal temperatures. Two of those days saw ‘high’ temperatures only in the single digits. Seven of those 10 days stayed below freezing and four saw low temperatures below zero.
Warmer weather courtesy of downslope flow did finally arrive and most of the rest of the month was warmer than average. Of the last 18 days of the month, only two had below normal temperatures.
Overall Thornton’s monthly average temperature for February 2014 was 28.5 degrees. This was four degrees below Denver’s February average of 32.5 degrees. Officially Denver’s average for the month was close to ours at 28.2 degrees.
While clearly a cold month, February 2014 failed to reach ‘top 10 coldest February’ status. Number 10 on that list is February 1905 with an average temperature of 25.2 degrees. The coldest February was in 1899 with an average of 17.6 degrees.
Temperatures ranged from a high of 68.3 degrees on the 16th down to a low of -12.6 degrees on the morning of the 5th. Out at the airport, Denver saw its highest temperature of 68 degrees and its lowest of -19 degrees on the same dates.
Denver record low maximum temperatures on the 5th and 6th. High temperatures on those days were minus 1 degree and plus 1 degree respectively.
Thornton recorded a mere 0.17 inches of precipitation in the rain bucket during the month. Denver officially saw 0.19 inches. Both fall well short of the February average of 0.37 inches. While dry, it wasn’t dry enough to be one of the top 10 driest Februarys.
In terms of snowfall, Thornton measured 4.7 inches. Denver lagged with only 3.3 inches. Again, both were a good ways below the historical Denver average of 5.7 inches.
Click here to view Thornton’s February 2014 climate report.
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
628 AM MST SAT MAR 1 2014
...................................
...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF FEBRUARY 2014...
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2014
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 77 02/28/2006
02/04/1890
LOW -25 02/01/1951
02/08/1936
HIGHEST 68 02/16 77 -9 63 02/17
LOWEST -19 02/05 -25 6 5 02/22
AVG. MAXIMUM 42.3 46.2 -3.9 43.3
AVG. MINIMUM 14.1 18.9 -4.8 16.9
MEAN 28.2 32.5 -4.3 30.1
DAYS MAX >= 90 0 0.0 0.0 0
DAYS MAX <= 32 8 3.9 4.1 6
DAYS MIN <= 32 26 26.9 -0.9 28
DAYS MIN <= 0 5 1.3 3.7 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 2.01 1934
MINIMUM 0.01 1970
TOTALS 0.19 0.37 -0.18 0.77
DAILY AVG. 0.01 0.01 0.00 0.03
DAYS >= .01 4 5.3 -1.3 6
DAYS >= .10 1 0.7 0.3 4
DAYS >= .50 0 0.0 0.0 0
DAYS >= 1.00 0 0.0 0.0 0
GREATEST
24 HR. TOTAL 0.12 02/04 TO 02/04 0.43
02/24 TO 02/24
STORM TOTAL 2.3 9.1
(MM/DD(HH)) 02/04 TO 02/04 02/24 TO 02/24
SNOWFALL (INCHES)
RECORDS
TOTAL 22.1 02-1912
TOTAL 3.3 02-2014 5.7 1980-2010
DEGREE_DAYS
HEATING TOTAL 1022 908 114 972
SINCE 7/1 4519 4439 80 4272
COOLING TOTAL 0 0 0 0
SINCE 1/1 0 0 0 0
FREEZE DATES
RECORD
EARLIEST 09/08/1962
LATEST 06/08/2007
EARLIEST 10/07
LATEST 05/05
.....................................................
WIND (MPH)
AVERAGE WIND SPEED 10.5
RESULTANT WIND SPEED/DIRECTION 2/270
HIGHEST WIND SPEED/DIRECTION 48/270 DATE 02/16
HIGHEST GUST SPEED/DIRECTION 59/270 DATE 02/16
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.60
NUMBER OF DAYS FAIR 2
NUMBER OF DAYS PC 18
NUMBER OF DAYS CLOUDY 8
AVERAGE RH (PERCENT) 63
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 0
LIGHT RAIN 1 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 1
LIGHT SNOW 10 SLEET 0
FOG 19 FOG W/VIS <= 1/4 MILE 8
HAZE 12
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
The past two months have brought periods of extreme cold but not a lot of snow to Denver. March however is our snowiest month and may bring a turnaround in those numbers. It also typically brings much warmer temperatures.
March is historically Denver’s snowiest month and brings about 20% of our annual snowfall. Heavy, wet spring snow storms can oftentimes bring the entire month’s snowfall total in one monstrous snow.
We also start the transition to spring and severe weather season and the month typically brings our first thunderstorms of the year. Temperatures climb throughout the month and by the end our average daytime highs are near 60 degrees.
For a complete look at what lies ahead in March 2014, click here.
Unseasonably cold weather gripped much of the nation in January and brought a term to public’s consciousness they may not have heard before: polar vortex. As explained in a video from NASA, the ‘stretching’ of the vortex was responsible for the record-setting cold seen last month.
NASA writes:
This movie of temperature observations from NASA’s Atmospheric Infrared Sounder (AIRS) instrument on NASA’s Aqua spacecraft depicts the first major North American weather event of 2014: cold air moving out of the Arctic and south to cover much of the continent. The temperatures shown are at a pressure of 850 hectopascals (hPa, formerly knows as millibars; sea level pressure is normally around 1000 hPa). Pressures of 850 hPa correspond to an altitude of about 3,000 feet (1 kilometer) above sea level. The temperatures in the movie range from about minus 18 degrees Fahrenheit (245 Kelvin or minus 28 degrees Celsius) to warmer than 66 degrees Fahrenheit (290 Kelvin or about 17 degrees Celsius). The very coldest temperatures in purples and blues are minus 18 to 17 degrees Fahrenheit (minus 28 to about minus 8 degrees Celsius).
The most obvious feature of the movie is the tongue of cold air moving out of Canada and southward to cover much of the eastern United States during early January 2014. This event was covered extensively in the media, and introduced the term ‘polar vortex’ to a broader audience.
This global perspective illustrates some features not noted in all the recent media attention. Perhaps most obvious: this is not a global phenomenon. The eastern half of the United States includes only about one percent of the total surface area of the planet (about two million of 197 million square miles). One advantage of satellite observations, as from AIRS, is coverage of the entire planet. A truly global perspective is required when studying variations in climate, and this event must be compared against a number of other phenomena occurring around the planet. Note that Alaska and northern Eurasia were warm during this period of unusual cold over the eastern United States.
January 2014 could be remembered as a month that brought a weather rollercoaster. Looking back it seems as if we were constantly jumping between mild temperatures to cold to warmth and back to cold again.
The month started out cooler than normal for the first two days with a light shot of snow on New Year’s Day. Temperatures then shot into the 60s on the 3rd but were followed by colder temperatures and more snow on the 4th. On the 5th we registered our coldest day of the month.
From the 7th to the 16th we experienced relatively calm conditions and only very light snow on one day. We saw above normal temperatures from the 15th to the 21st. Two cold days followed with snow falling on the 23rd.
Alternating above-normal and below-normal temperatures closed out the month. Four of the last five days saw snowfall.
Thornton recorded an average monthly temperature of 31.3 degrees. This was slightly higher than Denver’s official recording of 31.2 degrees. Both were slightly above the historical average January temperature of 30.7 degrees.
Temperatures in Thornton ranged from a high of 67.0 degrees on the 19th down to a low of -5.5 degrees on the 6th. Denver’s warmest temperature of 65 degrees also occurred on the 19th and it recorded its coldest of -10 degrees on the 5th.
All 31 days of the month saw low temperatures below freezing in Thornton and four days saw high temperatures fail to reach 32 degrees. Two days saw readings below zero. Denver’s readings were similar with four days staying below freezing and three seeing lows below zero.
Precipitation for the month was nearly double of the Denver historical average thanks to snowfall that was about double of normal.
Thornton recorded 1.06 inch of liquid precipitation, well above the average of 0.41 inch. Denver saw a bit less with 0.94 inch.
While no major snowstorms were seen, there were plenty of smaller events. These gave Thornton 13.4 inches of the white stuff during the month, Denver saw 14.3 inches. Both were about double the January average of 7.1 inches. The official Denver measurement propelled January 2014 into the books as the 11th snowiest January on record.
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
517 AM MST SAT FEB 1 2014
...................................
...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2014...
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2014
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 76 01/27/1888
LOW -29 01/09/1875
HIGHEST 65 01/19 76 -11 66 01/24
LOWEST -10 01/05 -29 19 -12 01/12
AVG. MAXIMUM 44.9 44.0 0.9 44.6
AVG. MINIMUM 17.3 17.4 -0.1 16.0
MEAN 31.1 30.7 0.4 30.3
DAYS MAX >= 90 0 0.0 0.0 0
DAYS MAX <= 32 4 5.5 -1.5 6
DAYS MIN <= 32 30 29.4 0.6 30
DAYS MIN <= 0 3 1.7 1.3 5
PRECIPITATION (INCHES)
RECORD
MAXIMUM 2.35 1883
MINIMUM 0.01 1933
1934
1952
TOTALS 0.94 0.41 0.53 0.31
DAILY AVG. 0.03 0.01 0.02 0.01
DAYS >= .01 9 4.1 4.9 4
DAYS >= .10 3 0.9 2.1 1
DAYS >= .50 0 0.0 0.0 0
DAYS >= 1.00 0 0.0 0.0 0
GREATEST
24 HR. TOTAL 0.26 01/30 TO 01/31 01/28 TO 01/29
01/29 TO 01/29
01/29 TO 01/29
STORM TOTAL MM MM
(MM/DD(HH)) MM 01/29(00) TO 01/29(00)
01/29(00) TO 01/29(00)9
01/29(00) TO 01/29(00)9
SNOWFALL (INCHES)
RECORDS
TOTAL MM MM
TOTALS 14.3 7.0
DEGREE_DAYS
HEATING TOTAL 1046 1063 -17 1067
SINCE 7/1 3497 3531 -34 3300
COOLING TOTAL 0 0 0 0
SINCE 1/1 0 0 0 0
FREEZE DATES
RECORD
EARLIEST 09/08/1962
LATEST 06/08/2007
EARLIEST 10/07
LATEST 05/05
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 10.7
RESULTANT WIND SPEED/DIRECTION 4/230
HIGHEST WIND SPEED/DIRECTION 36/290 DATE 01/12
HIGHEST GUST SPEED/DIRECTION 44/280 DATE 01/12
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.50
NUMBER OF DAYS FAIR 10
NUMBER OF DAYS PC 14
NUMBER OF DAYS CLOUDY 7
AVERAGE RH (PERCENT) 56
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 0
LIGHT RAIN 0 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 2 SNOW 5
LIGHT SNOW 11 SLEET 0
FOG 11 FOG W/VIS <= 1/4 MILE 4
HAZE 4
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
February in Colorado typically brings to an end an extended period when average temperatures are at their lowest. Winter begins to loosen its grip and temperatures get warmer but precipitation is not a particularly common event during the month.
Thanks to some late January snows, Denver’s seasonal snowfall has started to rebound but still remains below normal. February is only our sixth snowiest month so it may not provide much help on the precipitation month.
Temperatures however do usually see a nice rebound during the month. Average high temperatures climb from an average of 44 degrees at the start to 50 degrees by the end of February.
Another year is in the books and as we look back at 2013’s weather, we see Thornton – and indeed much of the state – saw cooler and wetter than normal conditions.
In terms of temperatures, Thornton saw an average overall annual temperature of 49.3 degrees. Out at Denver International Airport where the Mile High City’s official records are kept, the average was warmer at 50.1 degrees. By comparison, Denver’s 1981 to 2010 annual average temperature is 50.4 degrees.
Thornton recorded 47 days with temperatures at or above the 90 degree mark. At DIA 54 such days were recorded. Both were above the average of 40 90 degree days per year.
The hottest temperature recorded during the year in Thornton came on June 11th when the mercury climbed to 99.2 degrees. Denver’s hottest temperature of 100 degrees came on June 11th and July 11th.
At the opposite end of the thermometer, Thornton saw 175 days with low temperatures below freezing. Denver was very similar with 169 days with temperatures below 32 degrees. On average we expect to see 157 days below freezing.
Our coldest temperature in Thornton came last month on December 5th when the mercury dropped to -9.3 degrees. Denver’s occurred on the same date as the mercury at the airport dropped to -15 degrees.
Precipitation for 2013 came in well above normal thanks largely in part to the extraordinary amount of rain received in September.
In all, Thornton saw 21.67 inches of liquid precipitation in our bucket. Denver, as always drier due to the station being at DIA, saw 17.60 inches. Both were above the annual average of 14.92 inches.
Above and by far the wettest month of the year was September and was responsible for the above average precipitation numbers. Thornton saw 10.15 inches in the rain bucket that month alone, Denver 5.61 inches.
Snowfall during the calendar year ended up relatively strong thanks to healthy totals from February through April. Overall the rest of the months of the year saw below normal snowfall.
Thornton’s annual snow total came in at an even 70.0 inches. Denver bested us with 74.1 inches during 2013.
Denver’s 2013 / 2014 season however has started out dismally with only 8.1 inches so far in the Mile High City. Thornton ended December a bit better with 10.8 inches. Both are well below the long term average that would have us see 21.2 inches by the end of the year.
Click here to view Thornton’s 2013 climate summary.
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
427 PM MST WED JAN 1 2014
...................................
...THE DENVER CO CLIMATE SUMMARY FOR THE YEAR OF 2013...
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2013
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 105 06/26/2012
06/25/2012
07/20/2005
LOW -29 01/09/1875
HIGHEST 100 07/11 64 36 105 06/26
06/11 06/25
LOWEST -15 12/05 36 -51 -6 01/11
AVG. MAXIMUM 63.9 64.7 -0.8 68.4
AVG. MINIMUM 36.3 36.3 0.0 39.3
MEAN 50.1 50.5 -0.4 53.9
DAYS MAX >= 90 54 39.6 14.4 73
DAYS MAX <= 32 29 20.0 9.0 19
DAYS MIN <= 32 169 156.9 12.1 132
DAYS MIN <= 0 11 5.8 5.2 4
PRECIPITATION (INCHES)
RECORD
MAXIMUM 23.31 1967
MINIMUM 7.29 2008
TOTALS 17.60 14.30 3.30 10.11
DAILY AVG. 0.05 0.03 0.02 0.03
DAYS >= .01 82 79.7 2.3 52
DAYS >= .10 42 34.9 7.1 23
DAYS >= .50 8 7.6 0.4 9
DAYS >= 1.00 3 2.3 0.7 1
GREATEST
24 HR. TOTAL 2.39 09/13 TO 09/14
STORM TOTAL 4.65 09/09 TO 09/15
SNOWFALL (INCHES) RECORDS
TOTAL 115.9 1913
24 HR TOTAL 23.6 12/24/1982 TO 12/24/1982
SNOW DEPTH MM MM
TOTALS 72.1 53.8 18.3 38.5
LIQUID EQUIV 5.40 5.40 MM 3.85
SINCE 7/1 8.1 22.5 -14.4 12.4
LIQUID 7/1 0.81 2.20 -1.39 1.24
SNOWDEPTH AVG. 0 MM MM 0
DAYS >= TRACE 60 33.3 26.7 36
DAYS >= 1.0 20 16.3 3.7 13
GREATEST
SNOW DEPTH 9 02/25 11 02/04
24 HR TOTAL 9.1 02/24 TO 02/24 12.5 03/03
STORM TOTAL 11.7 03/22 TO 03/24 15.9 03/02
03/04
DEGREE_DAYS
HEATING TOTAL 6302 6059 243 5198
SINCE 7/1 2451 2468 -17 2233
COOLING TOTAL 999 769 230 1236
SINCE 1/1 999 769 230 1236
FREEZE DATES
RECORD
EARLIEST 09/08/1962
LATEST 06/08/2007
EARLIEST 10/07
LATEST 05/05
..................................................
WIND (MPH)
AVERAGE WIND SPEED 9.7
RESULTANT WIND SPEED/DIRECTION 2/201
HIGHEST WIND SPEED/DIRECTION 64/060 DATE 06/18
HIGHEST GUST SPEED/DIRECTION 97/040 DATE 06/18
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.60
NUMBER OF DAYS FAIR 69
NUMBER OF DAYS PC 232
NUMBER OF DAYS CLOUDY 64
AVERAGE RH (PERCENT) 52
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 14 RAIN 25
LIGHT RAIN 80 FREEZING RAIN 0
LT FREEZING RAIN 4 HAIL 0
HEAVY SNOW 11 SNOW 23
LIGHT SNOW 58 SLEET 0
FOG 105 FOG W/VIS <= 1/4 MILE 33
HAZE 88
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
As we begin the new year the winter chill begins to set in. While January can see its share of extremes, the month historically sees stable temperatures and is usually relatively dry.
January ranks as the second coldest month in Denver next to December with average temperatures remaining virtually the same from the start to the end of the month. In terms of snowfall, the month only ranks as the fourth snowiest and it is not uncommon for it to be quite dry.
What does January 2013 hold for us? Indications are that we may very well continue the recent pattern of below normal temperatures and relatively dry conditions.
For the complete January preview including a look at historical averages and extremes, click here.
Thornton and the Denver area closed out 2013 with a display of typically highly variable weather. We recorded some record low temperatures followed by unseasonably warm conditions. One thing that was lacking was snow.
The first three days of the month started out quite mild with highs well above normal. That changed quickly midday on the third as low pressure moved in bringing an extended Arctic blast.
For six straight days high temperatures remained stubbornly below freezing and lows dipped into the single digits. The cold snap was notable but not record-setting in terms of length. Two daily low temperature records were tied or broken however.
Warmer weather returned on the 10th as the mercury finally started to climb. Unseasonably warm temperatures became the rule for the next nine days that included a record high temperature on the 18th.
The last third of the month was a bit more variable with its ups and downs but overall warmer than normal conditions.
Overall Thornton’s monthly average temperature came in at 29.2 degrees. Out at Denver International Airport where the Mile High City’s official stats are recorded, it was a bit cooler with an average of 28.4 degrees. Both were below Denver’s December average of 30.0 degrees.
Thornton recorded nine days with high temperatures that failed to reach 32 degrees. On five days, low temperatures dropped below zero. Denver saw eight days with highs below freezing, six with lows below zero.
The warmest temperature of the month in Thornton came on the 18th when we recorded 66.8 degrees. Our coldest was -9.3 degrees on the 5th. Denver’s warmest day was on the 18th as well with a high of 68 degrees. Its lowest temperature was -15 degrees on the 5th.
Four temperature records were tied or broken in Denver.
The low temperature of -13 degrees on December 4th shattered the old record low for the date of -5 degrees last set in 2008. The following day, on December 5th, the low temperature of -15 degrees tied the record low last set in 1972.
The mild weather December 18 saw two records. The high of 68 degrees broke the previous high temperature record for the date of 66 degrees last set in 1979. Also, the day tied the record high minimum for the 18th of 40 degrees set in 1917.
Precipitation for the month of December 2013 was not as noteworthy as the temperatures. Thornton recorded only 0.24 inches in our bucket while Denver received 0.25 inches. Both were a good bit below the December average of 0.35 inches.
Snow was similarly less than extraordinary. Thornton measured 5.7 inches of the white stuff while Denver lagged that with 4.7 inches. Both totals were below the normal for December of 8.5 inches. Seasonal snowfall totals at this point are about half of what they normally are.
Click here to view Thornton’s December 2013 climate summary.
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
200 AM MST WED JAN 1 2014
...................................
...THE DENVER CO CLIMATE SUMMARY FOR THE YEAR OF 2013...
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2013
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 105 06/26/2012
06/25/2012
07/20/2005
LOW -29 01/09/1875
HIGHEST 100 07/11 64 36 105 06/26
06/11 06/25
LOWEST -15 12/05 36 -51 -6 01/11
AVG. MAXIMUM 63.9 64.7 -0.8 68.4
AVG. MINIMUM 36.3 36.3 0.0 39.3
MEAN 50.1 50.5 -0.4 53.9
DAYS MAX >= 90 54 39.6 14.4 73
DAYS MAX <= 32 29 20.0 9.0 19
DAYS MIN <= 32 169 156.9 12.1 132
DAYS MIN <= 0 11 5.8 5.2 4
PRECIPITATION (INCHES)
RECORD
MAXIMUM 23.31 1196
MINIMUM 7.29 2008
TOTALS 17.60 14.30 3.30 10.11
DAILY AVG. 0.05 0.04 0.01 0.03
DAYS >= .01 82 79.7 2.3 52
DAYS >= .10 42 34.9 7.1 23
DAYS >= .50 8 7.6 0.4 9
DAYS >= 1.00 3 2.3 0.7 1
GREATEST
24 HR. TOTAL 2.39 MM 12/31 TO 12/31
12/31 TO 12/31
12/31 TO 12/31
STORM TOTAL MM MM
(MM/DD(HH)) MM 12/31(00) TO 12/31(00)
12/31(00) TO 12/31(00)1
12/31(00) TO 12/31(00)1
SNOWFALL (INCHES)
RECORDS
TOTAL MM 5
24 HR TOTAL MM
SNOW DEPTH MM MM
TOTALS 74.1 53.8 20.3 38.5
LIQUID EQUIV 7.41 5.40 2.01 3.85
SINCE 7/1 8.1 22.5 -14.4 12.4
LIQUID 7/1 0.81 2.20 -1.39 1.24
SNOWDEPTH AVG. 0 MM MM 0
DAYS >= TRACE 60 33.3 26.7 36
DAYS >= 1.0 20 16.3 3.7 13
GREATEST
SNOW DEPTH 9 02/25 11 02/04
24 HR TOTAL 9.1 MM 12/31 TO 12/31
12/31 TO 12/31
12/31 TO 12/31
STORM TOTAL MM MM
(MM/DD(HH)) MM 12/31(00) TO 12/31(00)
12/31(00) TO 12/31(00)1
12/31(00) TO 12/31(00)1
DEGREE_DAYS
HEATING TOTAL 6302 6059 243 5198
SINCE 7/1 MM 2468 MM MM
COOLING TOTAL 999 0 999 1236
SINCE 1/1 999 769 230 1236
FREEZE DATES
RECORD
EARLIEST 09/08/1962
LATEST 06/08/2007
EARLIEST 10/07
LATEST 05/05
..................................................
WIND (MPH)
AVERAGE WIND SPEED 9.7
RESULTANT WIND SPEED/DIRECTION 2/201
HIGHEST WIND SPEED/DIRECTION 64/060 DATE 06/18
HIGHEST GUST SPEED/DIRECTION 97/040 DATE 06/18
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.60
NUMBER OF DAYS FAIR 69
NUMBER OF DAYS PC 232
NUMBER OF DAYS CLOUDY 64
AVERAGE RH (PERCENT) 52
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 14 RAIN 25
LIGHT RAIN 80 FREEZING RAIN 0
LT FREEZING RAIN 4 HAIL 0
HEAVY SNOW 11 SNOW 23
LIGHT SNOW 58 SLEET 0
FOG 105 FOG W/VIS <= 1/4 MILE 33
HAZE 88
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.