Severe Thunderstorm Warning 90, NWS Des Moines, IA

000 
WWUS53 KDMX 270145
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
843 PM CDT THU MAY 26 2005

IAC015-270153-
/O.CAN.KDMX.SV.W.0090.000000T0000Z-050527T0200Z/
BOONE IA-
843 PM CDT THU MAY 26 2005

...THE SEVERE THUNDERSTORM WARNING FOR BOONE COUNTY HAS BEEN
CANCELLED...

AT 838 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE
THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE EITHER WEAKENED OR
MOVED OUT OF THE AREA...AND NO LONGER POSE AN IMMEDIATE THREAT TO
LIFE OR PROPERTY. THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS
BEEN CANCELLED.

LAT...LON 4221 9370 4186 9371 4187 9324 4220 9326

$$

IAC169-270200-
/O.CON.KDMX.SV.W.0090.000000T0000Z-050527T0200Z/
STORY IA-
843 PM CDT THU MAY 26 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES FOR STORY COUNTY UNTIL 900
PM CDT...

AT 838 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
LINE OF SEVERE BUT DISSIPATING THUNDERSTORMS CAPABLE OF PRODUCING 
DAMAGING WINDS IN EXCESS OF 60 MPH...ALONG WITH VISIBILITIES LESS 
THAN A HALF MILE IN BLOWING DUST.  THE LEADING EDGE OF THESE STORMS 
WAS LOCATED ALONG A LINE EXTENDING FROM 10 MILES EAST OF STORY CITY 
TO 7 MILES EAST OF HUXLEY...OR ALONG A LINE EXTENDING FROM 43 MILES 
NORTH OF DES MOINES TO 21 MILES NORTH OF DES MOINES...AND MOVING 
EAST AT 50 MPH.

SEVERE THUNDERSTORMS WILL BE...
  NEAR ROLAND BY 830 PM CDT.
  NEAR NEVADA BY 835 PM CDT.
  NEAR MCCALLSBURG BY 840 PM CDT.
  NEAR ZEARING BY 845 PM CDT.

THE LOCATIONS OF KELLEY...GILBERT...SLATER...AMES MUNICIPAL
AIRPORT...CAMBRIDGE...MAXWELL...COLO AND COLLINS ARE ALSO IN THE PATH
OF THIS LINE OF SEVERE THUNDERSTORMS.

WINDS UP TO 56 MPH WERE REPORTED IN AMES WITH THIS STORM AT 833 PM. 

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE 
IMMEDIATELY FOR DAMAGING WINDS. PEOPLE OUTSIDE SHOULD MOVE 
TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM 
WINDOWS.


LAT...LON 4221 9370 4186 9371 4187 9324 4220 9326

$$

SMALL

000 
WWUS53 KDMX 270159
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
859 PM CDT THU MAY 26 2005

IAC169-270209-
/O.EXP.KDMX.SV.W.0090.000000T0000Z-050527T0200Z/
STORY IA-
859 PM CDT THU MAY 26 2005

...THE SEVERE THUNDERSTORM WARNING FOR STORY COUNTY HAS BEEN ALLOWED
TO EXPIRE...

AT 855 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE
THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE WEAKENED...AND NO
LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY. THEREFORE...THE
SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE.

IF SEVERE WEATHER WAS OBSERVED...CONTACT THE NATIONAL WEATHER SERVICE
OFFICE IN DES MOINES AT 1-800-759-9276.

LAT...LON 4221 9370 4186 9371 4187 9324 4220 9326

$$

SMALL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
245 PM CDT THU MAY 26 2005

.DISCUSSION...
MAIN NEAR TERM CONCERNS INCLUDE CONVECTIVE TRENDS LATE AFTERNOON
THROUGH THIS EVENING...AND POTENTIAL FOR ISOLD SVR HAIL/WIND GUSTS.
LOW AND MID LEVEL LAPSE RATES ARE RUNNING 7-8 DEGREES C/KM...WITH
CAPES ON THE ORDER OF 1000-1500 J/KG. STORMS ARE CURRENTLY
DEVELOPING IN NORTHWEST IOWA ALONG NOSE OF MID-LEVEL S/W. WOULD
EXPECT THE NORTHERN HALF OF THE CWA WILL HAVE HIGHEST COVERAGE OF
STORMS THROUGH 7 PM...WITH LINGERING SHOWERS AND MAYBE A RUMBLE OF
THUNDER DURING THE EVENING.  WITH DRY ADIABATIC SOUNDINGS UP THROUGH
ABOUT 750MB...THERE IS POTENTIAL TO MIX DOWN SOME STRONG
WINDS...WITH SMALL HAIL ALSO A THREAT. THE 500MB COLD POOL AROUND
-25 C WILL ROTATE ACROSS NORTHERN IOWA...PRODUCING SOME CONCERN FOR
COLD AIR FUNNELS. LCLS AND CLOUD BASES REMAIN HIGH SO LITTLE
CONCERN FOR ANY FUNNELS REACHING THE GROUND. ANY SEVERE THREAT
SHOULD BE LIMITED AFTER 00Z.

ON FRIDAY THE UPPER LOW OVER CANADA CONTINUES TO BRING A NW FLOW
OVER THE CWA AND PUMP IN COLDER AIR.  SEVERAL SHORTWAVES WILL
CONTINUE TO ROTATE THROUGH THE FLOW AND WITH THE COLD POOL ALOFT THE
POTENTIAL FOR SHOWERS REMAINS.  THE AIRMASS IS A BIT MORE STABLE
TOMORROW AND WE SHOULD SEE MORE CLOUDS AROUND THAN TODAY WHICH WOULD
HINDER ANY DESTABILIZATION.  HOWEVER...AN ISOLATED THUNDERSTORM
CANNOT BE RULED OUT.  MUCAPES DURING PEAK HEATING TOMORROW ARE
CONSIDERABLY LESS THAN TODAY WITH VALUES FROM 200-600 J/KG BUT GIVEN
THE STEEP LAPSE RATES DURING PEAK HEATING I KEPT ISOLATED STORMS IN
THE GRIDS.  ONCE THE SUN SETS WE SHOULD SEE THE SHOWERS DISSIPATE
AND THE CLOUDS THIN.  THIS PATTERN WILL CONTINUE THROUGH THE WEEKEND
KEEPING UNSEASONABLY COOL TEMPERATURES OVER THE CWA ALONG WITH
CHANCES FOR SHOWERS AND/OR ISOLATED STORMS.  IT DOES APPEAR THAT THE
UPPER LOW FINALLY PUSHES EAST BY MONDAY.  THE FINAL COLD SHOT WILL
COME LATE SUNDAY AND MONDAY WITH MANY LOCATIONS ACROSS THE CWA
REMAINING IN THE 60S FOR HIGHS.  I HAVE INCREASED POPS OVER THE AREA
TO ACCOUNT FOR THE SHORTWAVE AND SUBSEQUENT PUSH OF COLD AIR MONDAY
AFTERNOON.

THROUGH THE REMAINDER OF THE EXTENDED...AN UPPER RIDGE BUILDS INTO
THE REGION BY TUESDAY AND TEMPS BEGIN TO MODERATE BY DAY 6 AND 7.
&&

.DMX WATCHES/WARNINGS/ADVISORIES...NONE.

&&

KINNEY/FAB

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
145 PM CDT THU MAY 26 2005

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>073-271115-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN-
WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-CRAWFORD-CARROLL-GREENE-
BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE-DALLAS-POLK-JASPER-
POWESHIEK-CASS-ADAIR-MADISON-WARREN-
145 PM CDT THU MAY 26 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN AND CENTRAL
IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS WILL DEVELOP AND MOVE ACROSS PORTIONS OF
NORTHERN AND CENTRAL IOWA THIS AFTERNOON AND EARLY THIS EVENING. A
FEW STORMS COULD BE SEVERE...WITH HAIL UP TO QUARTER SIZE...AND
ISOLATED WIND GUSTS AROUND 60 MPH. THE HIGHEST CHANCE FOR SEVERE
STORMS IS NORTH OF HIGHWAY 30. COLD AIR FUNNEL CLOUDS COULD ALSO
DEVELOP...MAINLY NORTH OF HIGHWAY 20. THIS TYPE OF FUNNEL IS
NORMALLY BRIEF...AND RARELY BECOMES A TORNADO OR CAUSES DAMAGE.
THE CHANCE FOR SEVERE WEATHER WILL DIMINISH AFTER 7 PM.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

ISOLATED NON SEVERE STORMS ARE POSSIBLE FRIDAY AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS POSSIBLE...MAINLY THROUGH 7 PM THIS EVENING.

IAZ074-075-081>086-092>097-271115-
MARION-MAHASKA-ADAMS-UNION-CLARKE-LUCAS-MONROE-WAPELLO-TAYLOR-
RINGGOLD-DECATUR-WAYNE-APPANOOSE-DAVIS-
145 PM CDT THU MAY 26 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHERN IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A FEW THUNDERSTORMS MAY DEVELOP OVER THE AREA LATE THIS AFTERNOON
AND DURING THE EARLY EVENING. THESE STORMS WILL BE NON SEVERE.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

ISOLATED NON SEVERE STORMS ARE POSSIBLE FRIDAY AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

JAW/KINNEY

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
440 PM CDT THU MAY 26 2005

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

0428 PM     TORNADO          2 S GREENE              42.87N 92.80W
05/26/2005                   BUTLER             IA   FIRE DEPT/RESCUE

            FUNNEL BRIEFLY TOUCHED GROUND IN OPEN FIELD THEN LIFTED.

&&

CCOGIL

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
522 PM CDT THU MAY 26 2005

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

0455 PM     TSTM WND DMG     WOODWARD                41.86N 93.92W
05/26/2005                   DALLAS             IA   AMATEUR RADIO

            STOP SIGN SNAPPED OFF AT BASE.

&&

CCOGIL