Severe Thunderstorm Warning 121, NWS Aberdeen, SD

AREA FORECAST DISCUSSION FOR CENTRAL/NORTH CENTRAL/NORTHEAST SD
AND FOR TRAVERSE/BIG STONE COUNTIES OF MN
NATIONAL WEATHER SERVICE ABERDEEN SD
1007 AM CDT MON JUL 20 1998

STRONG TSRAS ACROSS FAR SE CLARK...HAMLIN AND DEUEL COUNTIES WILL BE
MOVING EAST OUT OF THE STATE BY NOON. OTHERWISE...A LOT OF HEAT AND
HUMIDITY FOR THIS AFTERNOON MAINLY FROM C INTO NE SD. TEMPS RISING INTO
THE 90S TO AROUND 100 AND DWPTS IN THE 70S. RHS WILL BE IN THE 45 TO 55
PERCENT RANGE WHICH SHOULD BRING HEAT INDICES AROUND 105 OR HIGHER. WILL
ISSUE A HEAT ADVISORY FOR C THROUGH NE SD FOR THIS AFTERNOON. HEAT
INDICES IN NC SD SHOULD BE LOWER WITH MOISTURE DECREASING AS WINDS
BECOME NW. BESIDES THE HOT AND HUMID CONDITIONS...THE 12Z RUC SHOWS A
SFC LOW MOVING ACROSS SOUTHERN CANADA WITH A TRAILING COLD FRONT MOVING
EAST ACROSS THE ABR CWA. CAPS ARE WEAK AND CAPES ARE HIGH...ESPECIALLY
FOR NE SD AND WC MN. SO CHANCE OF SEVERE TSRAS THIS AREA. LIKE SPCS
SLIGHT RISK AREA. WILL UPDATE ALL ZONES.

.ABR...HEAT ADVISORY...C THROUGH NE SD...THIS AFTERNOON.

MOHR

.ABR...NONE

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