Regional Weather Summary
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AWUS83 KFSD 220152
RWSSD
SDZ001>074-221700-

SOUTH DAKOTA WEATHER SUMMARY
NATIONAL WEATHER SERVICE SIOUX FALLS SD
852 PM CDT THU AUG 21 2014

IT WAS A PARTLY CLOUDY AT LATE MORNING  ACROSS THE RUSHMORE
STATE...BUT IT DID NOT TAKE LONG FOR CLOUDS TO BUILD IN THE
WEST...AND ISOLATED THUNDERSTORMS TO BEGIN TO POP UP IN AND NEAR THE
BLACK HILLS. THESE STORMS STARTED A SLOW DRIFT OUT INTO THE HIGH
PLAINS DURING THE LATER AFTERNOON AND EVENING. SOME OF THE HEAVIER
PRECIPITATION INDICATED BY RADAR FELL FROM NEAR CHEYENNE CROSSING
AND LEAD... TOWARD GALENA AND STURGIS. EARLY THIS EVENING...A SMALL
THUNDERSTORM CELL WAS PUSHING OUT OF THE BLACK HILLS ACROSS THE
RAPID CITY AREA.

TEMPERATURES THIS AFTERNOON PEAKED IN THE 80S TO AROUND 90...
RANGING FROM 80 DEGREES AT RAPID CITY...TO 91 DEGREES AT PHILIP.
HUMIDITY LEVELS REMAINED HIGH IN THE EAST...AND AS A RESULT...
AFTERNOON HEAT INDEX VALUES REACHED 95 TO 100 IN THE SOUTHEAST
CORNER OF THE STATE.  A MAX FEELS LIKE READING OF 97 DEGREES WAS
RECORDED AT YANKTON...WITH 100 DEGREES AT SIOUX FALLS...AND 101
DEGREES AT SIOUX CITY.

AT 8 PM CDT /7 PM MDT/...SKIES VARIED FROM MOSTLY CLEAR AND PARTLY
CLOUDY EAST...TO MOSTLY CLOUDY WEST. A FEW SHOWERS AND THUNDERSTORM
CONTINUED MAINLY WEST OF A LEMMON TO FAITH TO WASTA LINE. HUMIDITY
WAS HANGING ON IN THE SOUTHEAST WITH DEWPOINT READINGS AT SIOUX
FALLS AND YANKTON AT 70 OR ABOVE. TEMPERATURES ACROSS THE PLAINS
WERE IN THE 70S TO LOWER 80S...RANGING FROM 72 AT BUFFALO...TO 85 AT
PHILIP. WINDS WERE GENERALLY NORTH TO NORTHEAST AT LESS THAN 10 MPH.

ON THIS DATE IN 1985...SEVERE THUNDERSTORMS DEVELOPED ACROSS
NORTHWESTERN SOUTH DAKOTA AND RACED EASTWARD ACROSS THE STATE. THE
STORMS PRODUCED STRONG WINDS...LARGE HAIL...HEAVY RAINFALL...AND
DEADLY LIGHTNING. CONSIDERABLE CROP AND PROPERTY DAMAGE WAS REPORTED
ALONG THE TRACK OF THE STORMS...MAINLY DUE TO LARGE HAIL ACCOMPANIED
BY STRONG WINDS. WINDS GUSTS OF 72 MPH WERE REPORTED AT HOVEN. NEAR
LEMMON...PENNY SIZE HAIL DRIFTED TWO TO FOUR FEET IN DITCHES. NEAR
KELDRON...BASEBALL SIZE HAIL FELL FOR 40 MINUTES.

$$

CHAPMAN







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