Severe Thunderstorm Warning 151, NWS Des Moines, IA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
315 AM CDT WED JUL 26 2000

MAIN FORECAST PROBLEM WILL BE SLOW PROGRESSION OF FRONT AND
SHORTWAVES WRAPPING AROUND THE UPPER LOW. SURFACE FRONT WILL SLOWLY
WORK ACROSS THE STATE TODAY AND TONIGHT. FRONTAL BOUNDARY IS
EXPECTED TO STALL OUT ACROSS NORTHERN MISSOURI AND EASTERN NEBRASKA
ON THURSDAY. SCATTERED SHOWER AND THUNDERSTORM ACTIVITY IS EXPECTED
ALONG THIS BOUNDARY THROUGH FRIDAY.

SYSTEM TO WEAKEN AND FILL THROUGH THE NEXT 12 TO 18 HOURS WITH MAIN
SYNOPTIC SUPPORT SHIFTING EAST. MODERATE CAPES ALONG THE FRONT TODAY
WITH WEAK FORCING WILL AID SCATTERED THUNDERSTORM THROUGH THE DAY.
SHEAR WILL DECREASE ACROSS THE FORECAST AREA AS THE JET WEAKENS
ALOFT...SO THE TREAT OF SEVERE WEATHER WILL DECREASE THRU THE DAY.

BY THURSDAY THE MODELS DIFFER ON THE PLACEMENT OF THE FRONT.
MOISTURE AND INSTABILITY STILL AVAILABLE ACROSS SOUTHERN SECTIONS OF
THE DES MOINES FORECAST AREA. THE MODELS ALSO DIFFER ON PLACEMENT OF
SHORTWAVE ENERGY. GIVEN THE UNCERTAINTY IN PLACEMENT OF SURFACE AND
UPPER LEVEL FEATURES...WILL KEEP PRECIPITATION IN THE FORECAST FOR
SOUTHERN SECTIONS THURSDAY AND FRID{AY.

.DSM...NONE
TC

IAZ004>006-015-260600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1241 AM CDT WED JUL 26 2000

...SEVERE THUNDERSTORM WATCH NUMBER 620 CLEARED...

SEVERE THUNDERSTORM WATCH NUMBER 620 HAS BEEN CLEARED FROM THE
FOLLOWING NORTH CENTRAL IOWA COUNTIES...

EMMET...KOSSUTH...WINNEBAGO...PALO ALTO

SEVERE THUNDERSTORM WATCH NUMBER 621 REMAINS IN EFFECT HOWEVER.

MYERS

IAZ007-016-017-023>026-260640-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
118 AM CDT WED JUL 26 2000

...PORTIONS OF SEVERE THUNDERSTORM WATCH 621 CLEARED...

THE FOLLOWING COUNTIES IN THE NORTHERN PORTIONS OF SEVERE
THUNDERSTORM WATCH 621 HAVE BEEN CLEARED...

WORTH...HANCOCK...CERRO GORDO...POCAHONTAS...HUMBOLDT...WRIGHT AND
FRANKLIN.

THE REMAINDER OF THE COUNTIES REMAIN IN THE WATCH UNTIL 3 AM...OR
UNTIL CLEARED.

MYERS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
140 AM CDT WED JUL 26 2000

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

1155 PM    5 NW POCAHONTAS           IA   .88 INCH HAIL
07/25/00   POCAHONTAS                     REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.

1155 PM    POCAHONTAS                IA   60 MPH TSTM GUST
07/25/00   POCAHONTAS                     REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.

1205 AM    PALMER                    IA   .75 INCH HAIL
07/26/00   POCAHONTAS                     REPORTED BY KCCI TV.

1215 AM    FONDA                     IA   WIND DAMAGE
07/26/00   POCAHONTAS                     REPORTED BY STORM
                                          SPOTTER.  12 INCH
                                          DIAMETER TREE DOWN.

1230 AM    BADGER                    IA   .75 INCH HAIL
07/26/00   WEBSTER                        REPORTED BY KCCI TV.

1230 AM    BADGER                    IA   60 MPH TSTM GUST
07/26/00   WEBSTER                        REPORTED BY KCCI TV.

1230 AM    10 NE HUMBOLDT            IA   .75 INCH HAIL
07/26/00   HUMBOLDT                       REPORTED BY KCCI TV.

1245 AM    EARLY                     IA   1.75 INCH HAIL
07/26/00   SAC                            REPORTED BY STORM
    4                                      SPOTTER.

0108 AM    SAC CITY                  IA   1 INCH HAIL
07/26/00   SAC                            REPORTED BY KCCI TV.