River Flood Warning 235, NWS Des Moines, IA

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE DES MOINES IA
622 PM CDT FRI AUG 13 2010

...UPDATED AVIATION DISCUSSION...

.SHORT TERM /TONIGHT/...
SHORT AFD THIS AFTERNOON...STORMS CONTINUE TO FIRE EAST WITH VEERING
H850 MOISTURE FIELDS. THREAT FOR HEAVY RAINFALL AND STORMS COMING TO
AN END...WITH THE EXCEPTION OF THE FAR SOUTHEAST AND NORTH WHERE
WATCHES REMAIN IN EFFECT UNTIL MID EVENING. DRIER AIR TO FILTER INTO
THE REGION OVERNIGHT...BUT NOT BEFORE SOME FOG DEVELOPS TOWARD DAWN.
OTHER THAN THAT...QUIETER WEATHER ON THE WAY FOR LATER TONIGHT
THOUGH HUMIDITY WILL STICK AROUND THROUGH TOMORROW.

.LONG TERM /TONIGHT THROUGH THURSDAY/...
CDFNT EXITS THE STATE TNGT WITH SCNDRY FRONT MOVING IN SAT.
MOISTURE WILL BE MORE LIMITED AND AS A RESULT DO NOT EXPECT THE TSRA
POTENTIAL TO BE AS GREAT AS TODAY.  COULD BE A BRIEF PERIOD OF
STRONG TSRA MAINLY OVR NWRN IA SAT LATE AFTN AND ERY EVE...THEN THEY
SHOULD WEAKEN.  REST OF THE FCST IS RELATIVELY QUIET WITH COOLER AND
DRIER NWLY FLOW SETTLING IN AS HUDSBA LOW DROPS SWD.  THE COOLING
WILL LAST A FEW DAYS...BUT WARMING WILL BEGIN IN THE LATER STAGES OF
THE FCST AS THE UPER LOW TO THE EAST LIFTS OUT AND HI PRES BUILDS
INTO THE CNTRL U.S. AGAIN BY MID TO LATE NEXT WEEK.  TSRA CHNCS
INCREASE SLOWLY WITH THE WESTERLIES NOT ALL THAT FAR TO THE NORTH
AND MCS DEVELOPMENT WILL BECOME MORE OF AN ISSUE.
ORECAST BUFR SOUNDINGS.

&&

.AVIATION...14/00Z
COLD FRONT IS OVER NW IA ATTM AND WILL PROGRESS SLOWLY SE ACROSS THE
AREA OVERNIGHT. ALONG AND AHEAD OF THE FRONT TSRA WILL BE
POSSIBLE...MAINLY AT KFOD AND KMCW NEAR THE FRONT AND AT KOTM WHERE
GREATER INSTABILITY IS LEADING TO CONTINUAL STORM DVLPMNT ACROSS SRN
IA. EXPECT TSRA CHANCES TO DIMINISH A COUPLE OF HRS AFTER SUNSET. AT
KFOD/KMCW WILL HANDLE WITH JUST CB AS CHANCES ARE LOWER...BUT AT OTM
WHERE STORMS HAVE ALREADY DVLPD UPSTREAM WILL INCL VCTS AND A TEMPO
THROUGH 02Z. THEREAFTER...AVIATION CONCERN WILL SHIFT TO FOG DVLPMNT
AS FROPA BRINGS VERY LIGHT WINDS AND COOLER AIR OVER SATURATED
GROUND. EXPECT WDSPRD FOG WITH PDS OF VSBYS BLO 1SM LIKELY ESP AT
NORTHERN SITES. ON SAT VFR CONDITIONS ARE EXPECTED ACROSS THE AREA.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH UNTIL 1 AM CDT SATURDAY FOR
APPANOOSE-DAVIS-LUCAS-MAHASKA-MARION-MONROE-WAPELLO-WAYNE.

&&

SHORT TERM...REV
LONG TERM...MS AUG 10
AVIATION...REV

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PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
644 PM CDT FRI AUG 13 2010

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

0625 PM     FLASH FLOOD      5 SE RATHBUN LAKE       40.81N 92.89W
08/13/2010                   APPANOOSE          IA   LAW ENFORCEMENT

            WATER OF UNKNOWN DEPTH FLOWING OVER PAVED COUNTY ROAD J29
            AT A RAPID PACE. ROAD BEING BARRICADED.

&&

KJUNGBLU

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
655 PM CDT FRI AUG 13 2010

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

0400 PM     FLASH FLOOD      5 W FLORIS              40.87N 92.43W
08/13/2010                   DAVIS              IA   LAW ENFORCEMENT

            BRIDGE IMPASSABLE DUE TO FLASH FLOODING. DETAILS NOT YET
            AVAILABLE.

&&

KJUNGBLU

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
718 PM CDT FRI AUG 13 2010

IAZ083-084-094-095-140045-
CLARKE-DECATUR-LUCAS-WAYNE-
718 PM CDT FRI AUG 13 2010

...SPECIAL WEATHER STATEMENT...

AT 716 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM CENTRAL LUCAS COUNTY
TO CENTRAL DECATUR COUNTY...MOVING EAST AT 30 MPH.

ONE HALF INCH DIAMETER HAIL...WINDS GREATER THAN 30 MPH...AND
HEAVY DOWNPOURS...ARE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
  WILLIAMSON...         DERBY...              CHARITON...
  GARDEN GROVE...       HUMESTON...           RUSSELL...
  MILLERTON...

GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND. SEEK SHELTER INDOORS UNTIL THESE STORMS HAVE PASSED.

JUNGBLUTH

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