Flash Flood Warning 50, NWS Des Moines, IA

828 
WGUS73 KDMX 231222
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
722 AM CDT SAT AUG 23 2014

IAC001-003-039-121-175-181-231630-
/O.CON.KDMX.FF.W.0050.000000T0000Z-140823T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WARREN IA-MADISON IA-ADAIR IA-CLARKE IA-UNION IA-ADAMS IA-
722 AM CDT SAT AUG 23 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 AM CDT FOR
SOUTHWESTERN WARREN...SOUTHERN MADISON...SOUTHERN ADAIR...NORTHERN
CLARKE...NORTHERN UNION AND NORTHEASTERN ADAMS COUNTIES...

AT 721 AM CDT...TRAINED WEATHER SPOTTERS REPORTED FLASH FLOODING IN 
THE MURRAY AREA AND ACROSS NORTHWEST CLARKE COUNTY. OVER THREE 
INCHES OF RAIN FELL OVERNIGHT IN SOME AREAS. FLASH FLOODING IS 
OCCURRING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
GREEN VALLEY LAKE...MURRAY...NEW VIRGINIA...TRURO...ORIENT...
LORIMOR...EAST PERU...MACKSBURG...THAYER...MURRAY ROADSIDE REST AREA
AND GREEN VALLEY LAKE STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4110 9440 4110 9471 4124 9466 4135 9418
      4125 9370 4116 9355 4114 9356 4100 9400

$$

LEE

090 
WGUS73 KDMX 231410
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
910 AM CDT SAT AUG 23 2014

IAC001-003-039-121-175-181-231630-
/O.CON.KDMX.FF.W.0050.000000T0000Z-140823T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WARREN IA-MADISON IA-ADAIR IA-CLARKE IA-UNION IA-ADAMS IA-
910 AM CDT SAT AUG 23 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 AM CDT FOR
SOUTHWESTERN WARREN...SOUTHERN MADISON...SOUTHERN ADAIR...NORTHERN
CLARKE...NORTHERN UNION AND NORTHEASTERN ADAMS COUNTIES...

AT 839 908 AM CDT...TRAINED WEATHER SPOTTERS REPORTED WATER OVER THE 
ROADS SOUTHWEST OF MURRAY EXTENDING INTO UNION COUNTY.  FLOODING 
ALSO EXTENDED INTO CLARKE COUNTY.  OVER THREE INCHES OF RAIN FELL 
OVERNIGHT IN SOME AREAS. FLASH FLOODING IS OCCURRING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... GREEN VALLEY 
LAKE...MURRAY...NEW VIRGINIA...TRURO...ORIENT... LORIMOR...EAST 
PERU...MACKSBURG...THAYER...MURRAY ROADSIDE REST AREA AND GREEN 
VALLEY LAKE STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4110 9440 4110 9471 4124 9466 4135 9418
      4125 9370 4116 9355 4114 9356 4100 9400

$$

MS AUG 14

295 
WGUS73 KDMX 231535
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1035 AM CDT SAT AUG 23 2014

IAC001-003-231543-
/O.CAN.KDMX.FF.W.0050.000000T0000Z-140823T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ADAIR IA-ADAMS IA-
1035 AM CDT SAT AUG 23 2014

...THE FLASH FLOOD WARNING FOR SOUTHERN ADAIR AND NORTHEASTERN ADAMS
COUNTIES IS CANCELLED...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT. PLEASE CONTINUE TO HEED ALL ROAD CLOSURES.

LAT...LON 4110 9440 4110 9447 4115 9446 4116 9424
      4134 9424 4135 9418 4125 9370 4116 9355
      4114 9356 4100 9400

$$

IAC039-121-175-181-231630-
/O.CON.KDMX.FF.W.0050.000000T0000Z-140823T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WARREN IA-MADISON IA-CLARKE IA-UNION IA-
1035 AM CDT SAT AUG 23 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 AM CDT FOR
SOUTHWESTERN WARREN...SOUTHERN MADISON...NORTHERN CLARKE AND NORTHERN
UNION COUNTIES...

AT 1033 AM CDT...TRAINED WEATHER SPOTTERS REPORTED WATER OVER THE 
ROADS SOUTHWEST OF MURRAY EXTENDING INTO UNION COUNTY.  FLOODING 
ALSO EXTENDED INTO CLARKE COUNTY.  OVER THREE INCHES OF RAIN FELL 
OVERNIGHT IN SOME AREAS. FLASH FLOODING IS OCCURRING.  FLOOD WATERS 
CONTINUE TO RISE IN THE PERU AREA OF MADISON COUNTY.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
GREEN VALLEY LAKE...MURRAY...NEW VIRGINIA...TRURO...LORIMOR...EAST
PERU...MACKSBURG...THAYER...MURRAY ROADSIDE REST AREA AND GREEN
VALLEY LAKE STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4110 9440 4110 9447 4115 9446 4116 9424
      4134 9424 4135 9418 4125 9370 4116 9355
      4114 9356 4100 9400

$$

MS AUG 14

797 
WGUS73 KDMX 231616
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1116 AM CDT SAT AUG 23 2014

IAC039-121-175-181-231623-
/O.CAN.KDMX.FF.W.0050.000000T0000Z-140823T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WARREN IA-MADISON IA-CLARKE IA-UNION IA-
1116 AM CDT SAT AUG 23 2014

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN WARREN...SOUTHERN
MADISON...NORTHERN CLARKE AND NORTHERN UNION COUNTIES IS CANCELLED...

FLOOD WATERS HAVE REMAIN...HOWEVER FLOOD WATER REMAINS AND WILL 
RECEDE VERY SLOWLY THIS AFTERNOON AND EVENING.  FLASH FLOODING NO 
LONGER IS EXPECTED TO POSE A THREAT TO LIFE OR PROPERTY. PLEASE 
CONTINUE TO HEED ANY ROAD CLOSURES.  AN AREAL FLOOD WARNING REMAINS 
IN EFFECT FOR PARTS OF THE AREA.

LAT...LON 4110 9440 4110 9447 4115 9446 4116 9424
      4134 9424 4135 9418 4125 9370 4116 9355
      4114 9356 4100 9400

$$

MS AUG 14

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
416 AM CDT SAT AUG 23 2014

.SHORT TERM /TODAY/...
ISSUED AT 415 AM CDT SAT AUG 23 2014

YET ANOTHER ACTIVE OVERNIGHT/EARLY MORNING TODAY WITH A LARGE AREA
OF THUNDERSTORMS MOVING ACROSS WEST/SOUTHWEST IOWA AT THE CURRENT
HOUR. THIS ACTIVITY IS ASSOCIATED WITH THE NOSE OF THE NOCTURNAL LOW
LEVEL JET AND A SURGE OF WARM AIR ADVECTION ALOFT COMING OUT OF THE
SOUTHERN PLAINS. EXPECT THE STORMS TO MOVE SLOWLY ACROSS MUCH OF THE
FORECAST AREA THIS MORNING AND HAVE INCLUDED HIGH POPS ACCORDINGLY.
WHILE LOCALLY HEAVY RAINFALL WILL OCCUR...THE BAR FOR FLASH FLOODING
IS SET HIGH DUE TO ANTECEDENT AND VEGETATIVE CONDITIONS.

AS THE WARM AIR ADVECTION SURGE CONTINUES NORTHWARD AND THE JET
WEAKENS AFTER SUNRISE...EXPECT THE SWATH OF THUNDERSTORMS TO SHIFT
TOWARD THE NORTH AND NORTHEAST AND GRADUALLY DIMINISH...LIKELY
ENDING IN OUR NORTHEASTERN COUNTIES IN THE EARLY AFTERNOON.
MEANWHILE...BEHIND THIS PUSH HOTTER CONDITIONS WILL MOVE INTO
PARTICULARLY SOUTH/SOUTHWEST IOWA IN THE AFTERNOON. HEATING WILL BE
MITIGATED BY MORNING CONVECTIVE DEBRIS CLOUDS...SOUTHEASTERLY LOW
LEVEL WIND TRAJECTORIES...AND PERSISTENTLY HIGH DEWPOINTS...BUT
BELIEVE TEMPERATURES SHOULD STILL EXCEED YESTERDAYS LEVELS IN THESE
AREAS WITH LOWER 90S TYPICAL. HEAT INDEX VALUES WILL LIKELY TOP OUT
IN THE 100 TO 105 DEGREE RANGE ONCE AGAIN...JUST BELOW ADVISORY
CRITERIA AND PRECLUDING A HEADLINE ISSUANCE AT THIS TIME.

.LONG TERM /TONIGHT THROUGH FRIDAY/...
ISSUED AT 415 AM CDT SAT AUG 23 2014

UPPER LOW MOVING ACROSS IDAHO THIS MORNING...WILL CONTINUE TO
SHIFT EAST/NORTHEAST INTO WESTERN NORTH DAKOTA BY MID DAY SUNDAY.
STRONG PV ANOMALY OVER COLORADO AND NEW MEXICO WILL LIFT QUICKLY
NORTH AND BE INGESTED IN THE UPPER LOW OVERNIGHT. THIS WILL HELP
PUSH THE FRONTAL BOUNDARY WILL NORTH OF THE STATE AND PLACING THE
AREA INTO THE WARM SECTOR. MUCH DRIER MID LEVELS WILL HELP LOWER
PWATS DOWN TO NEAR 1.25 INCHES...WHICH WILL HELP STABILIZE THE
ATMOSPHERE. THE SUB TROPICAL HIGH WILL REMAIN ENTRENCHED OVER THE
SOUTHEAST CONUS AND WILL KEEP SOUTHWEST FLOW OVER THE STATE
THROUGH THE EARLY PORTION OF THE WEEK. TEMPERATURES SHOULD BE
QUITE WARM ON SUNDAY WITH THE THERMAL RIDGE IN PLACE WITH HIGHS
IN THE UPPER 80S TO MID 90S.

ANOTHER STRONG UPPER LOW WILL MOVE THROUGH THE INTERMOUNTAIN WEST
MID NEXT WEEK AND WILL HELP THE FRONTAL BOUNDARY DROP INTO IOWA
AND BECOME NEARLY STATIONARY ONCE AGAIN. THIS WILL RESULT INTO
SEVERAL CHANCES FOR THUNDERSTORMS TUESDAY AND WEDNESDAY WITH SOME
SEVERE WEATHER AND THE POTENTIAL FOR LOCALLY HEAVY RAINFALL. THE
UPPER LEVEL SYSTEM WILL EVENTUALLY PUSH THE SFC BOUNDARY TO THE
EAST OF THE STATE THOUGH THIS MAY NOT OCCUR UNTIL THURSDAY. A
NEARLY 20 DEGREE DIFFERENCE IN TEMPERATURES NORTH AND SOUTH OF THE
BOUNDARY WHILE IT IS STALLED OVER THE AREA WITH 70S NORTH TO NEAR
90 SOUTH. COOLER FOR THE ENTIRE AREA BY FRIDAY.

&&

.AVIATION...23/06Z
ISSUED AT 1150 PM CDT FRI AUG 22 2014

DELAYED CONVECTION UNTIL PAST 12Z SATURDAY FOR ALL TAF SITES AS
THE 23/00Z HOPWRF AND HRRR ARE IN GOOD AGREEMENT WITH CONVECTION
SPREADING ACROSS SOUTH-CENTRAL IOWA WITH THE HRRR MORE WIDESPREAD
FURTHER NORTH. HAVE MENTION OF VCTS AT FOD/DSM/OTM WITH A LITTLE
HIGHER CONFIDENCE SITES WILL SEE STORMS. HAVE MVFR TO IFR VIS WRT
TO FOG PAST 08Z TONIGHT. MIXING DEVELOPS LATE SATURDAY MORNING AND
KEPT MENTION OF GUSTS THROUGH THE AFTERNOON HOURS.

&&

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

SHORT TERM...LEE
LONG TERM...DONAVON
AVIATION...PODRAZIK

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
525 AM CDT SAT AUG 23 2014

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-241030-
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-MARION-MAHASKA-ADAMS-UNION-
CLARKE-LUCAS-MONROE-WAPELLO-TAYLOR-RINGGOLD-DECATUR-WAYNE-
APPANOOSE-DAVIS-
525 AM CDT SAT AUG 23 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE LIKELY THIS MORNING BEFORE DIMINISHING THROUGH
THE DAY FROM SOUTH TO NORTH. AN ISOLATED SEVERE STORM IS POSSIBLE
WITH 60 MPH WINDS. IN ADDITION...LOCALLY HEAVY RAINFALL IN EXCESS
OF 2 INCHES IS LIKELY.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

INTERMITTENT THUNDERSTORM CHANCES ARE POSSIBLE MONDAY THROUGH
WEDNESDAY. THE POTENTIAL FOR LOCALLY HEAVY RAINS WILL
PERSIST...ALONG WITH THE LESSER POTENTIAL FOR SEVERE WEATHER.

THE CUMULATIVE EFFECTS OF THE HEAT ARE FORECAST TO BUILD THIS WEEKEND.
ALTHOUGH HEAT INDICES WILL NOT BE EXTREME...PEAKING IN THE UPPER
90S TO AROUND 102 DEGREES...THE ELEVATED HEAT AND HUMIDITY WILL
LAST THROUGH MONDAY.

.SPOTTER INFORMATION STATEMENT...

INFREQUENT SPOTTER ACTIVATION IS POSSIBLE INTO NEXT WEEK.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
242 AM CDT SAT AUG 23 2014

IAZ044-045-057-058-070>072-081-082-230900-
CRAWFORD-CARROLL-AUDUBON-GUTHRIE-CASS-ADAIR-MADISON-ADAMS-UNION-
INCLUDING THE CITIES OF...DENISON...CARROLL...AUDUBON...EXIRA...
GUTHRIE CENTER...PANORA...BAYARD...CASEY...ATLANTIC...
GREENFIELD...STUART...ADAIR...FONTANELLE...WINTERSET...EARLHAM...
CORNING...CRESTON
242 AM CDT SAT AUG 23 2014

...STRONG STORMS MOVING ACROSS SOUTHWEST IOWA...

A LARGE CLUSTER OF STRONG THUNDERSTORMS WILL MOVE SLOWLY NORTHWARD
ACROSS PARTS OF SOUTHWEST IOWA EARLY THIS MORNING. THE STRONGEST
STORMS WITHIN THIS AREA WILL PRODUCE WIND GUSTS IN EXCESS OF 40
MPH...SMALL HAIL...AND LOCALLY HEAVY RAINFALL WHICH COULD LEAD TO
FLOODING OF SOME LOW LYING AND URBAN AREAS.

LEE