Hail in Minnesota, April 13, 2002

AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA
NATIONAL WEATHER SERVICE SIOUX FALLS
147 PM CDT SAT APR 13 2002

...MAIN CONCERNS ARE CHANCE FOR RAIN AND THUNDERSTORMS NEXT SEVERAL
DAYS...

CURRENTLY MONITORING A LINE OF THUNDERSTORMS TRACKING ACROSS EAST
CENTRAL SOUTH DAKOTA.  MOVING EAST AT ABOUT 30 MPH WITH BRIEF PULSES
TO VIL VALUES AROUND 25. THESE STORMS DEVELOPED ALONG A WEAK
BOUNDARY THAT WAS STRETCHING SOUTH FROM AN UPPER LEVEL WAVE MOVING
THROUGH EASTERN ND. EXPECT THIS LINE TO CONTINUE EAST...CLEARING
MOST OF THE CWA BY 02Z OR 03Z.  SOUTHERN PART OF CWA MAY SEE VERY
LITTLE AS BETTER UPPER FORCING FARTHER NORTH.  WESTERN CWA...NOW
BEHIND THE FRONT...SHOULD BE DRY FOR THE REST OF THE NIGHT.

WATER VAPOR LOOP SHOWS STRONG PIECE OF ENERGY MOVING INTO MONTANA
WHICH WILL BE THE PRECURSOR TO A CHANGE IN THE UPPER LEVEL PATTERN
FOR THE WEEK.  THIS CHANGE WILL BRING WARMER TEMPS TO THE SOUTHERN
AND EASTERN PART OF THE CWA WITH A MORE MODERATE WARMING TO THE
NORTH AND WEST.

FOR TONIGHT...EXPECT ONGOING PRECIP TO MOVE EAST BY 03Z BUT NEXT
SPEED MAX WILL MOVE ACROSS ND TONIGHT BRINGING A SHOT OF PRECIP TO
NORTHERN SD.  WILL CARRY SMALL POPS FOR NORTHERN TIER OF COUNTIES.
EXPECT SIMILAR LOWS TO THIS MORNING.

FOR SUNDAY...A LITTLE COOLER AIR TRACKS IN BEHIND PASSING SYSTEM BUT
DISSIPATE AND LIFTS BACK NORTH QUICKLY DURING THE DAY.  LOOKING FOR
HIGHS FROM THE LOW 70S SW MN TO THE LOW 80S SOUTH CENTRAL SD.

SUNDAY NIGHT THROUGH TUESDAY...ENERGY MOVES ACROSS NORTHERN PART OF
THE REGION DROPPING A BOUNDARY INTO THE AREA.  BIGGEST QUESTION IS
HOW FAR SOUTH THE BOUNDARY WILL GO...ANY PRECIP WITH IT AND HOW
QUICKLY WILL IT WASH OUT. WITHOUT A SIGNIFICANT PIECE OF UPPER LEVEL
ENERGY MOVING THROUGH...AND WITHOUT ANY EXPECTATIONS OF A LARGE
MCS...EXPECT A FAIRLY WEAK FRONT THAT WILL STALL IN SOUTHERN SD
MONDAY MORNING THEN LIFT BACK RAPIDLY TO THE NORTH.  THIS WILL LEAVE
THE SOUTHERN THIRD OF THE CWA DRY UNTIL ABOUT TUESDAY AS BOUNDARY
LIFTS RAPIDLY NORTH WITH MUCH WARMER AIR MOVING IN. WILL GO PRETTY
WARM SUNDAY THROUGH TUESDAY WITH 80S POSSIBLE EVERY DAY IN NORTHWEST
IOWA.  AS A STRONGER SHORTWAVE MOVES ACROSS THE REGION TUESDAY...THE
FRONT WILL SAG BACK THROUGH THE CWA...BRINGING AN INCREASING THREAT
FOR THUNDERSTORMS TO THE ENTIRE CWA.  WILL CONTINUE CHANCE FOR ALL
AREAS.

COOLER AIR DROPS IN BEHIND THIS LATE TUESDAY INTO WEDNESDAY
MORNING...BUT MRF AND LATEST AVN SUGGESTING THAT THIS BOUNDARY WILL
ALSO LIFT BACK NORTH WITH DECENT WAA RETURNING ON WEDNESDAY. HAVE
ADDED CHANCE TO THIS DAY.  OVERALL...VERY ACTIVE PATTERN THROUGH DAY
6.

.FSD...NONE.

08

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
601 PM CDT SAT APR 13 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0455 PM    DOLTON                    SD   1.5 INCH HAIL
04/13/02   TURNER                         REPORTED BY PUBLIC.

0505 PM    DOLTON                    SD   .88 INCH HAIL
04/13/02   TURNER                         REPORTED BY PUBLIC.

0515 PM    6 S CANISTOTA             SD   .75 INCH HAIL
04/13/02   MCCOOK                         REPORTED BY PUBLIC.

0525 PM    4 SE CANISTOTA            SD   .88 INCH HAIL
04/13/02   MCCOOK                         REPORTED BY PUBLIC.

0533 PM    6 SE CANISTOTA            SD   .75 INCH HAIL
04/13/02   MCCOOK                         REPORTED BY PUBLIC.

0538 PM    6 E CANISTOTA             SD   1 INCH HAIL
04/13/02   MCCOOK                         REPORTED BY PUBLIC.