Climatological Report (Monthly) Issued by NWS Des Moines, IA
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CXUS53 KDMX 011839
CLMDSM
DSMCLMDSX 000
TTAA00 KDMX 011729
CLIMATE REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1129 AM CST TUE JAN 1 2013
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...THE DES MOINES CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2012...
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1878 TO 2012
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 69 12/03/2012
12/28/1984
12/08/1946
LOW -22 12/23/1989
HIGHEST 69R 12/03 55 14 60 12/31
LOWEST 2 12/26 -5 7 4 12/10
12/25
AVG. MAXIMUM 39.1 34.0 5.1 41.7
AVG. MINIMUM 22.5 18.0 4.5 24.1
MEAN 30.8 26.0 4.8 32.9
DAYS MAX >= 90 0 0.0 0.0 0
DAYS MAX <= 32 9 12.5 -3.5 5
DAYS MIN <= 32 24 28.0 -4.0 25
DAYS MIN <= 0 0 3.2 -3.2 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.72 1931
MINIMUM T 2002
TOTALS 1.93 1.42 0.51 2.53
DAILY AVG. 0.06 0.05 0.01 0.08
DAYS >= .01 6 8.4 -2.4 9
DAYS >= .10 4 3.6 0.4 4
DAYS >= .50 1 0.8 0.2 2
DAYS >= 1.00 0 0.2 -0.2 1
SNOWFALL (INCHES)
RECORDS
TOTAL 28.2 2009
TOTALS 15.5 9.0 6.5 2.0
SINCE 7/1 15.5 11.9 3.6 5.7
SNOWDEPTH AVG. 3 4 -1 0
DAYS >= 1.0 3 2.8 0.2 1
GREATEST
SNOW DEPTH 11 12/20 1 12/10
12/09
24 HR TOTAL 12.4 12/19 TO 12/20
DEGREE_DAYS
HEATING TOTAL 1054 1209 -155 986
SINCE 7/1 2151 2467 -316 2062
COOLING TOTAL 0 0 0 0
SINCE 1/1 1613 1066 547 1353
.................................................................
WIND (MPH)
AVERAGE WIND SPEED 9.6
HIGHEST WIND SPEED/DIRECTION 39/320 DATE 12/20
HIGHEST GUST SPEED/DIRECTION 54/310 DATE 12/20
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.70
NUMBER OF DAYS FAIR 5
NUMBER OF DAYS PC 12
NUMBER OF DAYS CLOUDY 14
AVERAGE RH (PERCENT) 71
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 1
HEAVY RAIN 0 RAIN 2
LIGHT RAIN 7 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 2 SNOW 3
LIGHT SNOW 9 SLEET 1
FOG 17 FOG W/VIS <= 1/4 MILE 5
HAZE 17
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
&&
DECEMBER STARTED OUT VERY WARM WITH HIGH TEMPERATURES IN THE 50S AND
60S FOR THE FIRST FOUR DAYS OF THE MONTH. A RECORD DAILY HIGH
TEMPERATURE OF 69 OCCURRED ON DECEMBER 3RD...WHICH ALSO TIES FOUR
OTHER YEARS FOR THE HIGHEST TEMPERATURE EVER RECORDED IN THE MONTH
OF DECEMBER. TEMPERATURES REMAINED ABOVE NORMAL AND THE WEATHER WAS
QUIET THROUGH THE MIDDLE OF THE MONTH. THIS CAME TO A SUDDEN END ON
DECEMBER 19TH AND 20TH WHEN A POWERFUL BLIZZARD PUMMELED MUCH OF THE
STATE. JUST OVER A FOOT OF SNOW FELL IN DES MOINES DURING THIS STORM
WITH WINDS TOPPING OUT AT OVER 50 MPH. THE MONTH ENDED ON A COLD
NOTE WITH TEMPERATURES RUNNING AT OR BELOW NORMAL. THE LOWEST
READING AT DES MOINES WAS 2 DEGREES ON THE 25TH AND 26TH...MEANING
THAT THE DES MOINES TEMPERATURE NEVER FELL TO 0 DEGREES OR BELOW
DURING 2012. THIS IS THE FIRST TIME DES MOINES HAS NOT REACHED ZERO
DEGREES IN A CALENDAR YEAR.
$$