The Year in Weather - 2011 - Updated

2011 Annual Climate Reports
Burlington Cedar Rapids Davenport Dubuque Iowa City Moline
 
Storm Data and Unusual Weather Phenomena
- 2011 -
January February March April May June
July August September October November December
 
January 10-11th Snowstorm Information

January 17th Snowstorm information

January 31-February 2: Blizzard (Groundhog day)
Radar Loop of the 2011 Groundhog Day Blizzard
Radar Loop courtesy of Iowa Environmental Mesonet



A 24 HOUR RECORD SNOWFALL OF 16.7 INCHES WAS SET AT MOLINE FEBRUARY 1-2.  THIS BREAKS THE OLD RECORD OF 16.4 INCHES SET ON JANUARY 3 1971.
 
A RECORD STORM TOTAL SNOWFALL OF 18.4 INCHES WAS TIED AT MOLINE JANUARY 31 THROUGH FEBRUARY 2. THIS TIES THE OLD RECORD SET ON JANUARY 11-13 1979.


Moline Area  (ThreadEx Station)
Extremes
Highest Total Snowfall inches
Days: 1/1 - 12/31
Length of period: 3 days
Years: 1850-2011
 
Rank  Value  Ending Date
  1    18.4    2/ 2/2011
               1/13/1979
  3    16.4    1/ 3/1971
  4    15.1    1/19/1995
  5    15.0    3/30/1972
  6    14.3    1/ 3/1999
  7    12.7    1/27/1967
               3/13/1951
  9    12.0    3/15/1923
 10    11.8   12/11/1944
               1/25/1898
               2/ 9/1885
 13    11.5    3/ 4/1952
 14    11.4   12/15/1987
 15    11.2   12/31/1978
               3/15/1912
 

May 22 - Iowa County Tornadoes

May 25 - Des Moines County Tornadoes

July 11- Derecho (Wind Event)
Radar Loop of July 11th
Radar Loop of July 11th


July 27-28 - Dubuque Flash Flood (Rainfall records set)


July 2011 - One for the Record Books
 
...HOT DAYS...WARM NIGHTS...AND HEAVY RAIN MADE JULY 2011 A MEMORABLE MONTH...

RECORDS WERE TOPPLED AS HEAT AND HUMIDITY CONVERGED UPON THE REGION IN JULY.  DURING THE MIDDLE OF THE MONTH TEMPERATURES SOARED TO THE 90S DURING THE DAY...YET ONLY COOLED TO THE 70S AT NIGHT. 
 
 ...WARMEST DAY JULY 19...

 * MOLINE........100°
 * CEDAR RAPIDS...98°
 * IOWA CITY......98°
 * BURLINGTON.....97°
 * DAVENPORT......97°
 * DUBUQUE........97°...TIED PREVIOUS RECORD OF 97° SET 1940.

FROM THE 18TH THROUGH THE 20TH NIGHTTIME RECORDS WERE TIED OR BROKEN SEVERAL TIMES WHEN LOWS REMAINED UNSEASONABLY WARM.

...RECORD WARM MINIMUM TEMPERATURES... 

> JULY 18

DUBUQUE 75°...TIED WARM MINIMUM SET 1931 AND PREVIOUS YEARS
MOLINE 79
°...TIED WARM MINIMUM SET IN 1942

> JULY 19

DUBUQUE NEW RECORD OF 75°...OLD RECORD 74° IN 1935
MOLINE NEW RECORD OF 80
°...OLD RECORD 76° SET IN 1987

> JULY 20

DUBUQUE 76°...TIED WARM MINIMUM SET IN 1934
MOLINE 78
°...TIED WARM MINIMUM SET IN 1987


...DUBUQUE PRECIPITATION RECORDS SET IN JULY...

> JULY 27

DAILY MAXIMUM RAINFALL...7.47"...OLD RECORD 3.10" SET IN 1896
DAILY RAINFALL RECORD FOR THE MONTH OF JULY...7.47"...
OLD RECORD 6.28" SET JULY 1 1961

> JULY 28

DAILY MAXIMUM RAINFALL...3.27"...OLD RECORD 2.30" SET IN 1990

> JULY 27-28

24 HOUR RAINFALL...10.62"...OLD RECORD 8.96" SET AUG 21-22 2002
> JULY 

WETTEST JULY AT DUBUQUE...16.01" IN 2011...OLD RECORD 12.23" SET IN 1961

Drought Conditions Seen for Much of August and September

Dry and below normal precipiation fell across southeast Iowa, west central 
Illinois and northeast Missouri during August - October.  Several climate
sites saw below normal precipitation and the precipitation departures from
normal are listed below.


August
  August    Sept     Sept     October October
Precip
  Precip    Precip    Precip Precip Precip
Departure          Departure Departure
f
rom from from
Normal Normal Normal
----------------------------------------------------------------------------
Burlington    0.44     -3.83     1.32     -2.20     0.98     -2.14
Cedar Rapids  0.95    -3.53     1.92     -1.24     1.60     -1.02
Dubuque       3.30    -1.10     2.50     -0.96     1.26     -1.40
Moline        3.01    -1.51     2.66     -0.43     0.67     -2.30
 

November 9th Snowstorm Information



December 8th - Dec 9th Snowstorm Information

 

 



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