PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
139 PM MDT THU JUL 28 2005
 
...DROUGHT CONDITIONS PERSIST AFTER WARM AND DRY JULY...
 
.SYNOPSIS...AN UPPER LEVEL RIDGE OF HIGH PRESSURE DOMINATED THE
WEATHER ACROSS NORTHEASTERN WYOMING AND WESTERN SOUTH DAKOTA DURING
THE MONTH OF JULY. THE RIDGE OF HIGH PRESSURE BROUGHT ABOVE NORMAL
TEMPERATURES AND BELOW NORMAL PRECIPITATION TO THE REGION. THIS
SITUATION HAS CAUSED AN EXPANSION OF THE AREAS CONSIDERED ABNORMALLY
DRY OR IN MODERATE DROUGHT ACROSS WESTERN SOUTH DAKOTA SINCE THE
MIDDLE OF JUNE. DROUGHT CONDITIONS WOULD LIKELY BE WORSE HAD IT NOT
BEEN FOR THE WET WEATHER ACROSS THE REGION FROM LATE APRIL THROUGH
THE MIDDLE OF JUNE.
 
DURING THE FIRST 27 DAYS OF JULY...TEMPERATURES ACROSS FAR WESTERN
SOUTH DAKOTA AND IN NORTHEASTERN WYOMING HAVE AVERAGED 1.5 TO 3.8
DEGREES ABOVE NORMAL...WHILE IN CENTRAL AND SOUTH CENTRAL SOUTH
DAKOTA TEMPERATURES WERE 0.5 TO 1.5 DEGREES ABOVE NORMAL.
 
AT THE RAPID CITY REGIONAL AIRPORT THE TEMPERATURE TOPPED 100 DEGREES
SIX TIMES...WHICH IS THE SEVENTH MOST ON RECORD. THE RECORD FOR 100
DEGREE DAYS IN JULY WAS SET IN 1936 WHEN THE HIGH TEMPERATURE
REACHED 100 DEGREES OR MORE ON 13 DAYS. RECORD HIGH TEMPERATURES
WERE SET THREE TIMES DURING THE MONTH WITH 106 DEGREES ON THE 9TH...
109 DEGREES ON THE 16TH AND 105 DEGREES ON THE 19TH. SO FAR JULY HAS
BEEN THE 25TH WARMEST ON RECORD IN RAPID CITY.
 
RAINFALL ACROSS NORTHEASTERN WYOMING...THE BLACK HILLS AND
NORTHWESTERN SOUTH DAKOTA HAS BEEN BETWEEN 45 AND 65 PERCENT OF
NORMAL WITH LOCALIZED AREAS ONLY RECEIVING 30 TO 45 PERCENT OF
NORMAL. ON THE PLAINS OF WESTERN SOUTH DAKOTA RAINFALL HAS GENERALLY
BEEN 50 TO 75 PERCENT OF NORMAL.
 
LOCALIZED AREAS HAVE RECEIVED NEAR OR ABOVE NORMAL RAINFALL...
ESPECIALLY IN SOUTHWESTERN SOUTH DAKOTA WHERE RAINFALL WAS 25 TO 50
PERCENT ABOVE NORMAL IN FALL RIVER AND SHANNON COUNTIES. DROUGHT
CONDITIONS HAVE IMPROVED SOME DURING THE PAST MONTH IN THESE TWO
COUNTIES.
...OUTLOOK FOR AUGUST THROUGH OCTOBER...
DROUGHT CONDITIONS ARE EXPECTED TO CONTINUE ACROSS WESTERN SOUTH
DAKOTA AND NORTHEASTERN WYOMING THROUGH OCTOBER. IF NORMAL OR ABOVE
NORMAL RAINFALL OCCURS DURING THIS PERIOD SOME IMPROVEMENT IN DROUGHT
CONDITIONS CAN BE EXPECTED...ESPECIALLY ACROSS NORTHEASTERN WYOMING
AND FAR WESTERN SOUTH DAKOTA.
 
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