Regional Weather Summary
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AWUS83 KFSD 210206
RWSSD
SDZ001>074-211700-

SOUTH DAKOTA WEATHER SUMMARY
NATIONAL WEATHER SERVICE SIOUX FALLS SD
906 PM CDT SUN JUL 20 2014

A MOSTLY SUNNY TO SUNNY SKY PREVAILED OVER SOUTH DAKOTA TODAY...
EXCEPT FOR PARTLY SUNNY CONDITIONS FROM LOW LEVEL CLOUDS SOUTHEAST
OF A LINE FROM LAKE ANDES TO BANCROFT. THERE WERE ALSO SOME
SCATTERED MID AND HIGH LEVEL CLOUDS MOVING INTO THE WESTERN THIRD OF
THE STATE FROM EASTERN WYOMING AND SOUTHEAST MONTANA LATE THIS
AFTERNOON AND EVENING. THE TWO MAIN FEATURES OF THE AFTERNOON WERE
HEAT AND HUMIDITY. HIGH TEMPERATURES WERE MOSTLY IN THE 90S...WITH A
FEW PLACES TOPPING THE CENTURY MARK. RELATIVE HUMIDITY IN THE MID
AND LATE AFTERNOON WAS IN THE 50 TO 70 PERCENT CATEGORY ACROSS THE
EASTERN HALF OF SOUTH DAKOTA...AND IN THE 25 TO 40 PERCENT CATEGORY
ACROSS THE WESTERN HALF OF THE STATE. WITH MORE HEAT EXPECTED
MONDAY...THE HEAT INDEX IN THE EASTERN HALF OF SOUTH DAKOTA WILL BE
HIGHER...AS HUMIDITY REMAINS HIGH. THE WESTERN HALF OF THE STATE
LOOKS TO HAVE SIMILAR HIGH TEMPERATURES...AND LOWER HUMIDITY.

ALTHOUGH HIGH TEMPERATURES ACROSS SOUTH DAKOTA THIS AFTERNOON WERE
MOSTLY IN THE 90S...THERE WAS SOME VARIABILITY. THE CENTRAL AND
SOUTH CENTRAL PARTS OF THE STATE WERE THE HOTTEST...WITH MANY
READINGS IN THE UPPER 90S TO SLIGHTLY ABOVE 100. PHILIP WAS THE
APPARENT HOT SPOT...RECORDING 102 DEGREES. PIERRE WAS CLOSE
BEHIND...WITH 101. WHERE THE LOW LEVEL CLOUDS TOOK SO LONG TO
DISSIPATE IN THE EAST...HIGHS WERE RESTRICTED TO THE LOW AND MID 80S.
MADISON ONLY MADE IT TO 81 DEGREES. WATERTOWN WAS JUST A BIT
WARMER...WITH 83...AND SO WAS SIOUX FALLS...WITH 84. IN THE BLACK
HILLS...CUSTER WARMED TO 87 DEGREES.

AT 8 PM CDT / 7 PM MDT...A CLEAR TO PARTLY CLOUDY SKY PREVAILED OVER
SOUTH DAKOTA. TEMPERATURES ACROSS THE PLAINS WERE IN THE MID 80S TO
LOW 90S WEST...AND UPPER 70S TO MID 80S EAST. EXTREMES ON THE HOUR
RANGED FROM 97 DEGREES AT PHILIP...TO 79 AT WATERTOWN. IN THE BLACK
HILLS...CUSTER WAS ALSO DOWN TO 79 DEGREES. WINDS ACROSS THE WESTERN
HALF OF SOUTH DAKOTA VARIED FROM EAST TO SOUTH AT 5 TO 12 MPH. THE
EASTERN HALF OF THE STATE HAD SOUTHEAST TO SOUTHWEST WINDS AT 6 TO
13 MPH...WITH GUSTS OF 16 TO 22 MPH AT HURON AND CHAMBERLAIN.

A PARTLY TO MOSTLY CLOUDY SKY WILL BE OVER SOUTH DAKOTA TONIGHT...
WITH A SLIGHT CHANCE OF THUNDERSTORMS IN THE NORTHEAST. LOW
TEMPERATURES ACROSS THE PLAINS WILL RANGE FROM THE MID AND UPPER 60S
IN THE WESTERN THIRD...TO THE LOW 70S CLOSER INTERSTATE 29. IN THE
BLACK HILLS...MINIMUMS WILL DIP INTO THE MID 50S TO MID 60S.

$$





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