Severe Thunderstorm Warning 311, NWS Des Moines, IA

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE DES MOINES IA
1000 PM CDT SAT JUL 31 2004

.SHORT TERM...(TONIGHT-TUE NIGHT)
UPDATED ZONES OUT TO REFLECT THE EXPIRATION OF THE TOR WATCH AND THE
SVR THAT REPLACES IT.  THE FRONT HAS LIFTED INTO MN AND THE BEST
MSTR CONVERGENCE AND THETA-E ADVECTION FM SW MN INTO ECEN MN.  FNT
MAY SAG INTO NRN IA BUT RUC HAS PEGGED THIS SO FAR AND IT CONTINUES
TO SUGGEST CONVECTION IN MN WITH SOME DRIBBLING INTO IA AFT 08Z.
CURRENT CONVECTION THAT WAS OVER SW MN DROPPING S AS SUGGESTED BY
THE CORFIDI VECTORS.  THIS SHOULD REMAIN OUT OF OUR CWA AND I AM NOT
EXPECTING TO SEE MUCH.  SOME DEVELOPMENT SHOULD OCCUR WITH THE LLJ
BUT WE WILL SEE WHERE THAT OCCURS.

NO CHANGES MADE TO ANY OTHER PARAMETERS EXCEPT LOWER POPS SOUTH AND
RAISE TEMPS A DEGREE OR SO.

.DMX WATCHES/WARNINGS/ADVISORIES...NONE

&&

FAB

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
1018 PM CDT SAT JUL 31 2004

IAZ004>007-015>017-023-024-011100-
CERRO GORDO-EMMET-HANCOCK-HUMBOLDT-KOSSUTH-PALO ALTO-POCAHONTAS-
WINNEBAGO-WORTH-
1018 PM CDT SAT JUL 31 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR A PORTION OF CENTRAL IOWA...
GENERALLY NORTH OF U.S. HIGHWAY 20.

.DAY ONE...TONIGHT
THUNDERSTORMS IN NORTHWEST IOWA WILL GRADUALLY SINK TO THE SOUTH
OR SOUTHEAST OVERNIGHT.  SOME STORMS MAY PRODUCE LARGE HAIL
ESPECIALLY ALONG AND NORTH OF HIGHWAY 20.  STRONG WIND GUSTS TO
60 MPH ARE ALSO POSSIBLE WITH A FEW STORMS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY
THERE WILL BE SEVERAL PERIODS OF THUNDERSTORM CHANCES THROUGH
FRIDAY. THE HIGHEST RISK OF SEVERE THUNDERSTORMS WILL BE LATE SUNDAY
AFTERNOON AND EVENING...AND AGAIN MONDAY NIGHT...MAINLY OVER AREAS
NORTH OF INTERSTATE 80.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED LATE TONIGHT.

IAZ025>028-033>039-044>050-057>062-011100-
AUDUBON-BLACK HAWK-BOONE-BREMER-BUTLER-CALHOUN-CARROLL-CRAWFORD-
DALLAS-FRANKLIN-GREENE-GRUNDY-GUTHRIE-HAMILTON-HARDIN-JASPER-
MARSHALL-POLK-POWESHIEK-SAC-STORY-TAMA-WEBSTER-WRIGHT-
1018 PM CDT SAT JUL 31 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR A PORTION OF CENTRAL IOWA...
GENERALLY SOUTH OF U.S. HIGHWAY 20 TO INTERSTATE 80.

.DAY ONE...TONIGHT
SCATTERED THUNDERSTORMS MAY PUSH INTO CENTRAL IOWA BETWEEN HIGHWAY
20 TO INTERSTATE 80 AFTER MIDNIGHT.  A FEW STORMS MAY PRODUCE LARGE
HAIL AND STRONG WIND BUT THE STORMS SHOULD STAY BELOW SEVERE
LIMITS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY
THERE WILL BE SEVERAL PERIODS OF THUNDERSTORM CHANCES THROUGH
FRIDAY. THE HIGHEST RISK OF SEVERE THUNDERSTORMS WILL BE LATE SUNDAY
AFTERNOON AND EVENING...AND AGAIN MONDAY NIGHT...MAINLY OVER AREAS
NORTH OF INTERSTATE 80.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED TONIGHT BUT MAY BE REQUIRED
SUNDAY AFTERNOON AND EVENING.

IAZ070>075-081>086-092>097-011100-
ADAIR-ADAMS-APPANOOSE-CASS-CLARKE-DAVIS-DECATUR-LUCAS-MADISON-
MAHASKA-MARION-MONROE-RINGGOLD-TAYLOR-UNION-WAPELLO-WARREN-WAYNE-
1018 PM CDT SAT JUL 31 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR A PORTION OF CENTRAL IOWA...
GENERALLY SOUTH INTERSTATE 80.

.DAY ONE...TONIGHT
NO HAZARDOUS WEATHER IS EXPECTED.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY
THERE WILL BE SEVERAL PERIODS OF THUNDERSTORM CHANCES THROUGH
FRIDAY. THE HIGHEST RISK OF SEVERE THUNDERSTORMS WILL BE LATE SUNDAY
AFTERNOON AND EVENING...AND AGAIN MONDAY NIGHT...MAINLY OVER AREAS
NORTH OF INTERSTATE 80.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED ON SUNDAY AFTERNOON AND EVENING.

FAB

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1255 AM CDT SUN AUG 01 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

1248 AM     TSTM WND GST     LAKE CITY               42.27N 94.73W
08/01/2004  60 MPH           CALHOUN            IA   LAW ENFORCEMENT

            CALHOUN COUNTY SHERIFF REPORTED 60 MPH WIND GUST WHILE IN
            LAKE CITY.

&&

FAB

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