Several locations in eastern Washington recorded one of their coldest Aprils on record as reported by NWS Spokane:
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
500 AM PDT SUN MAY 1 2011
...COOL APRIL FOR EASTERN WASHINGTON AND NORTHERN IDAHO...
AN UNUSUALLY COOL AND PERSISTENT WEATHER PATTERN HELD SWAY OVER THE
REGION DURING THE MONTH OF APRIL, 2011. NEW RECORD LOW MONTHLY
AVERAGE TEMPERATURES WERE SET AT CHIEF JOSEPH DAM, COEUR D`ALENE,
THE EPHRATA AIRPORT, RITZVILLE, STEHEKIN AND AT PANGBORN MEMORIAL
AIRPORT IN WENATCHEE.
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LOCATION AVERAGE HISTORICAL DEPARTURE RECORD
TEMP (F) RANK FROM NORM (F)/YEAR
BOUNDARY DAM 41.0 3RD -4.7 37.8/2008
CHIEF JOSEPH DAM 45.6 1ST -5.9 45.8/1955*
CHELAN 46.1 4TH -4.8 45.5/1955
COEUR D`ALENE 41.2 1ST -5.4 41.4/2008*
COLVILLE 44.3 5TH -3.6 42.7/1901
EPHRATA 45.0 1ST -6.6 45.1/1955*
GRAND COULEE DAN 44.5 3RD -5.3 43.7/1955
HOLDEN VILLAGE 35.2 2ND -4.7 35.0/1972
KELLOGG 40.9 3RD -5.8 40.1/2008
LACROSSE 44.4 3RD -4.9 43.2/1967
LEWISTON 45.7 2ND -5.4 45.0/1955
LIND 44.1 2ND -5.3 43.6/1955
MAZAMA 39.7 2ND -4.7 39.5/1982
MOSES LAKE 45.1 3RD -5.2 44.2/1955
OMAK 43.5 2ND -6.1 43.2/2008
PLAIN 40.6 4TH -3.6 38.1/1955
PULLMAN-MOSCOW 40.9 4TH -5.3 39.8/1975
RITZVILLE 41.1 1ST -6.1 41.3/2008*
SPOKANE AIRPORT 41.5 2ND -5.0 40.6/1955
STEHEKIN 38.0 1ST -9.6 41.4/1955*
WENATCHEE 45.7 1ST -5.8 46.6/1970*
WINTHROP 42.3 5TH -4.6 41.3/1955
NOTE: "*" SIGNIFIES THIS RECORD HAS BEEN SURPASSED IN 2011
