Flash Flood Warning 4, NWS Des Moines, IA

551 
WGUS73 KDMX 130639
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1239 AM CST SAT MAR 13 2010

IAC187-131130-
/O.CON.KDMX.FF.W.0004.000000T0000Z-100313T1130Z/
/00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WEBSTER IA-
1239 AM CST SAT MAR 13 2010

...FLASH FLOOD WARNING FOR ICE JAM FLOODING REMAINS IN EFFECT FOR
CENTRAL WEBSTER COUNTY UNTIL 530 AM CST...

AT 1238 AM CST...EMERGENCY MANAGEMENT REPORTED THAT FLASH FLOODING 
CONTINUED ALONG THE DES MOINES RIVER ON THE NORTH EDGE OF FORT 
DODGE...IN THE BREEN AND RIVERDALE ADDITIONS. WATER WAS SURROUNDING 
OR ENTERING HOMES IN THE BREEN ADDITION. AROUND MIDNIGHT WATER WAS 
REPORTEDLY RISING RAPIDLY IN THE RIVERDALE ADDITIONS.  LARGE ICE 
CHUNKS WERE FLOWING DOWNSTREAM RAPIDLY.  PORTIONS OF ROADS NEAR THIS 
AREA OF THE RIVER WERE ALSO LIKELY UNDER WATER. THE WATER CONTINUED 
TO RISE SLOWLY.


SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...FORT DODGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4259 9419 4246 9415 4245 9419 4258 9424

$$

786 
WGUS73 KDMX 130737
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
137 AM CST SAT MAR 13 2010

IAC187-131130-
/O.CON.KDMX.FF.W.0004.000000T0000Z-100313T1130Z/
/00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WEBSTER IA-
137 AM CST SAT MAR 13 2010

...FLASH FLOOD WARNING FOR ICE JAM FLOODING REMAINS IN EFFECT FOR
CENTRAL WEBSTER COUNTY UNTIL 530 AM CST...

AT 132 AM CST...EMERGENCY MANAGEMENT REPORTED THAT FLASH FLOODING 
CONTINUED ALONG THE DES MOINES RIVER ON THE NORTH EDGE OF FORT 
DODGE.  IN THE BREEN ADDITION THE WATER WAS BEGINNING TO FALL...THE 
RIVER WAS ICE FREE AND FLOWING RAPIDLY.  IN THE RIVERDALE 
ADDITION...WATER CONTINUED TO RISE AND WAS SURROUNDING OR ENTERING 
HOMES.  REPORTS FROM ALONG SCENIC DRIVE INDICATED LARGE ICE CHUNKS 
FLOWING DOWNSTREAM...TOPPLING TREES AND BLOCKING THE ROAD AT NORTH 
7TH AND MILLER.  

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...FORT DODGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR
OCCURRING. IF YOU ARE IN THE WARNING AREA...MOVE TO HIGHER GROUND
IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO
CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 4259 9419 4246 9415 4245 9419 4258 9424

$$

145 
WGUS73 KDMX 130838
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
238 AM CST SAT MAR 13 2010

IAC187-131130-
/O.CON.KDMX.FF.W.0004.000000T0000Z-100313T1130Z/
/00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WEBSTER IA-
238 AM CST SAT MAR 13 2010

...FLASH FLOOD WARNING FOR ICE JAM FLOODING REMAINS IN EFFECT FOR
CENTRAL WEBSTER COUNTY UNTIL 530 AM CST...

AT 237 AM CST...EMERGENCY MANAGEMENT REPORTED THAT FLASH FLOODING 
CONTINUED ALONG THE DES MOINES RIVER ON THE NORTH EDGE OF FORT 
DODGE.  IN THE BREEN ADDITION THE WATER WAS BEGINNING TO FALL...THE 
RIVER WAS ICE FREE AND FLOWING RAPIDLY.  IN THE RIVERDALE 
ADDITION...WATER CONTINUED TO RISE AND WAS SURROUNDING OR ENTERING 
HOMES.  REPORTS FROM ALONG SCENIC DRIVE INDICATED LARGE ICE CHUNKS 
FLOWING DOWNSTREAM...TOPPLING TREES AND BLOCKING THE ROAD AT NORTH 
7TH AND MILLER.  

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...FORT DODGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR
OCCURRING. IF YOU ARE IN THE WARNING AREA...MOVE TO HIGHER GROUND
IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO
CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 4259 9419 4246 9415 4245 9419 4258 9424

$$

290 
WGUS73 KDMX 130938
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
338 AM CST SAT MAR 13 2010

IAC187-131130-
/O.CON.KDMX.FF.W.0004.000000T0000Z-100313T1130Z/
/00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WEBSTER IA-
338 AM CST SAT MAR 13 2010

...FLASH FLOOD WARNING FOR ICE JAM FLOODING REMAINS IN EFFECT FOR
CENTRAL WEBSTER COUNTY UNTIL 530 AM CST...

AT 336 AM CST...EMERGENCY MANAGEMENT REPORTED THAT FLASH FLOODING 
CONTINUED ALONG THE DES MOINES RIVER ON THE NORTH EDGE OF FORT 
DODGE.  NO ADDITIONAL DAMAGE REPORTS HAVE BEEN RECEIVED IN THE PAST 
HOURS.  IN THE BREEN ADDITION THE WATER LEVELS WERE FALLING AND THE 
RIVER WAS FLOWING FREE OF ICE.  IN THE RIVERDALE ADDITION...WATER 
CONTINUED TO RISE SLOWLY AND WAS SURROUNDING OR ENTERING HOMES.  
REPORTS FROM ALONG SCENIC DRIVE INDICATED LARGE ICE CHUNKS FLOWING 
DOWNSTREAM TOPPLED TREES AND BLOCKED ROADS IN THE NORTH 7TH AND 
MILLER AREA AROUND 230 AM THIS MORNING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...FORT DODGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR
OCCURRING. IF YOU ARE IN THE WARNING AREA...MOVE TO HIGHER GROUND
IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO
CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 4259 9419 4246 9415 4245 9419 4258 9424

$$

144 
WGUS73 KDMX 131048
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
448 AM CST SAT MAR 13 2010

IAC187-131130-
/O.CON.KDMX.FF.W.0004.000000T0000Z-100313T1130Z/
/00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WEBSTER IA-
448 AM CST SAT MAR 13 2010

...FLASH FLOOD WARNING FOR ICE JAM FLOODING REMAINS IN EFFECT FOR
CENTRAL WEBSTER COUNTY UNTIL 530 AM CST...

AT 446 AM CST...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT 
NUMEROUS ROADS WERE BARRICADED DUE TO ICE AND WATER ON THE ROAD.  
THIS INCLUDED SCENIC DRIVE AND MILLER ROAD.  WATER CONTINUED TO 
THREATEN THE BREEN ADDITION AS WELL AS POSING A SIGNIFICANT THREAT 
TO THE RIVERDALE ADDITION.  WATER LEVELS APPEARED TO BE STABILIZING 
HOWEVER.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...FORT DODGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR
OCCURRING. IF YOU ARE IN THE WARNING AREA...MOVE TO HIGHER GROUND
IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO
CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 4259 9419 4246 9415 4245 9419 4258 9424

$$

055 
WGUS73 KDMX 131123
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
523 AM CST SAT MAR 13 2010

IAC187-131136-
/O.EXP.KDMX.FF.W.0004.000000T0000Z-100313T1130Z/
/00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WEBSTER IA-
523 AM CST SAT MAR 13 2010

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT CENTRAL WEBSTER COUNTY
WILL BE ALLOWED TO EXPIRE AT 530 AM CST...

THE WEBSTER COUNTY SHERIFF OFFICE REPORTED THAT NUMEROUS ROADS WERE 
BARRICADED DUE TO ICE AND WATER ON THE ROAD...INCLUDING SCENIC DRIVE 
AND MILLER ROAD.  WATER ALSO CONTINUED TO THREATEN THE BREEN AND 
RIVERDALE ADDITIONS...HOWEVER WATER LEVELS HAVE NOT CHANGED IN THE 
PAST FEW HOURS AND IT APPEARS THE WATER IS FLOWING THROUGH THE ICE 
JAM AREAS. 

THEREFORE...THE THREAT FOR ICE JAMS HAS ENDED FOR NOW.  HOWEVER...
ICE JAMS CAN REFORM QUICKLY AND PRODUCE RAPID FLOODING WITH LITTLE
WARNING. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE AREA THROUGH
SUNDAY EVENING. 

LAT...LON 4259 9419 4246 9415 4245 9419 4258 9424

$$

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE DES MOINES IA
554 PM CST FRI MAR 12 2010

...UPDATED 13/00Z AVIATION DISCUSSION...

.SHORT TERM /TONIGHT/...
SURFACE LOW IS SHIFTING EAST TONIGHT WHILE THE UPPER LEVEL FEATURES
CONTINUE TO DIVE TO THE SOUTHEAST.  LATEST MODEL RUNS KEEP THE BULK
OF THE PRECIP FROM THE WRAP AROUND OF THIS SYSTEM TO OUR SOUTH AND
EAST THOUGH WE DO GET CLIPPED IN OUR SOUTHEAST BY SOME PRECIP LATER
TONIGHT.  THE GFS IS ONLY SLIGHTLY MORE BULLISH ON THIS IDEA SO
COMPROMISES WERE MADE TO TONIGHTS GRIDS.  FIRST POPS WERE PULLED
BACK FROM MOST LOCATIONS EXCEPT THE FAR SOUTH THROUGH MIDNIGHT.
AFTER MIDNIGHT I KEPT THE HIGHER POPS RELEGATED TO THE SOUTH AND
EAST AND WHILE I FEEL THIS IS HIT HARDER THAN IT NEEDS TO BE...THE
MOVEMENT OF THE LOW AND THE EXTENT OF THE WRAP AROUND IS STILL IN
QUESTION.  IT SHOULD STILL HAVE A LESSER IMPACT ON CENTRAL IOWA
WHICH IS GOOD GIVEN THE SNOW PACK TO THE NORTH AND THE RISING RIVERS
ELSEWHERE.  TEMPS LOOKED GOOD FOR TONIGHT.  BROUGHT AFTERNOON MAXES
UP A BIT AND WITH THE EXPECTED CONTINUED CLOUD COVER I DID NUDGE
LOWS UP AS WELL.

ONE CAVEAT IS THE PRECIP TO OUR NORTH AND WEST COMING DOWN AND
CAUGHT UP IN THE UPPER FLOW.  AT THIS TIME IT LOOKS LIKE IT WILL
JUST GRAZE OUR WESTERN COUNTIES.  HOWEVER...IF THINGS SHIFT EAST
FASTER THAN I AM CURRENTLY THINKING THEN THE PRECIP MAY NOSE INTO
OUR WESTERN COUNTIES A BIT MORE AGGRESSIVELY THAN I HAVE THEM
FORECAST FOR NOW.  THIS WILL NEED TO BE WATCHED THIS EVENING.

.LONG TERM /TONIGHT THROUGH THURSDAY/...
FINAL STAGE OF STRONG SOUTHERN STREAM SHORT WAVES EXPECTED TO MOVE
THROUGH SATURDAY THEN EXIT THE REGION. TWO PRIMARY PIECES OF ENERGY
THAT ARE OF INTEREST. FIRST THE CLOSED LOW THAT WAS OVER IOWA ON
THURSDAY AND NOW LOCATED SOUTH OF KANSAS CITY AND A SECOND STRONG
SHORT WAVE NOW LIFTING INTO THE LOWER OHIO VALLEY. THE CLOSED LOW
WILL REMAIN THE PRIMARY SYSTEM AS IT DIVES SOUTHEAST AND INTO THE
SOUTHEASTERN CONUS BY SATURDAY MORNING. THE OTHER SHORT WAVE WILL
BECOME CAUGHT UP IN THE CYCLONIC FLOW AND ROTATE BACK TO THE LATE
TONIGHT AND INTO SATURDAY MORNING. TRENDS CONTINUE TO SUGGEST A MORE
SOUTHERLY TRACK OF THE WRAP AROUND IMPULSE REACHING NEAR ST. LOUIS
AND SOME KINEMATIC FORCING AND UVM LINGERING INTO THE SOUTHEAST AND
SOUTHERN THIRD OF THE FORECAST AREA SATURDAY MORNING. MID LEVEL DRY
AIR SHOULD BRING AN END TO THE RAIN DURING THE DAY THOUGH GOOD LOW
LEVEL SATURATED LAYERS WOULD SUGGEST WITH SOME VERTICAL MOTION AND
COALESCENCE TAKING PLACE...MAY HELP PRODUCE SOME DRIZZLE SATURDAY
INTO SATURDAY NIGHT. AREAS OF FOG...MAYBE LOCALLY DENSE...ARE
POSSIBLE BUT NORTHERLY LOW LEVEL FLOW WOULD NOT BE SUPPORTIVE OF
ANYTHING SIGNIFICANT.

ANOTHER SYSTEM IS EXPECTED TO DROP SOUTHEAST THROUGH THE NORTHWEST
FLOW MONDAY THROUGH TUESDAY. A FEW SHOWERS ARE POSSIBLE WITH THIS
SYSTEM THOUGH ONCE AGAIN NOT ENOUGH PRECIPITATION TO AFFECT CURRENT
HYDRO SITUATION. THEN UPPER RIDGE WILL BUILD INTO THE MIDWEST WITH
THE THERMAL RIDGE NOT TOO FAR BEHIND. COULD BE QUITE WARM BY
THURSDAY AND WITH SOME SUN AND SOUTHERLY FLOW...COULD PUSH SOME 60S
INTO IOWA. NOT QUITE THIS WARM IN THE FORECAST YET. SOME TIMING
DIFFERENCE WITH PACIFIC SYSTEM FOR THE END OF NEXT WEEK. USED A
ECMWF/GFS BLEND WHICH CENTERS PRECIPITATION CHANCES ON FRIDAY.

&&

.AVIATION...
13/00Z...SURFACE LOW LOCATED OVER THE OHIO VALLEY...AND A PAIR OF
VORT MAXES ARE ANTICIPATED TO AFFECT THE STATE OVERNIGHT INTO
TOMORROW. FIRST VORT MAX LOCATED OVER SOUTHWEST MN WILL ENTER
NORTHERN IOWA LATER THIS EVENING AND HAVE BROUGHT MVFR VIS AND CIGS
AFTER 04Z...WITH THE POTENTIAL FOR IFR CONDITIONS TOWARDS MORNING.
THE SOUTHERN VORT MAX LOCATED OVER NORTHERN MO WILL BRING IN RAIN
ACROSS OTM...AND POSSIBLY DSM AREA THROUGH THE OVERNIGHT HOURS.
STILL LOOKING AT MVFR TO IFR CONDITIONS OVERNIGHT INTO TOMORROW
MORNING...WITH BUFR SOUNDINGS INDICATING AT LEAST DRIZZLE FOR AN
EXTENDED PERIOD ON SATURDAY. MVFR CIGS PERSIST THROUGH TOMORROW
NIGHT WITH LOW LEVEL MOISTURE AND CAA AFFECTING THE STATE.

&&

.HYDROLOGY...
WIDESPREAD MODERATE TO MAJOR FLOOD EVENT CONTINUES TO UNFOLD ACROSS
THE ENTIRE CWA. WE/RE NOT LOOKING AT ANOTHER 2008 EVENT HOWEVER.
THIS FLOOD EVENT WAS EXPECTED TO OCCUR...THOUGH...PER OUR FIRST
SPRING FLOOD OUTLOOK FROM LATE JANUARY WHICH HIGHLIGHTED A HIGH RISK
OF SIGNIFICANT FLOODING. THE FLOOD THREAT IS MIGRATING FROM SOUTH TO
NORTH WITH TIME. BASINS OF MOST CONCERN ARE FIRST THE DES
MOINES/RACCOON...FOLLOWED BY THE CEDAR/IOWA THEN SKUNK. MODERATE TO
MAJOR FLOODING EXPECTED AT MANY LOCATIONS IN THE DES MOINES/RACCOON
RIVER BASINS.

ICE JAMS CONTINUE TO BE PROBLEMATIC...WITH THE LEADING EDGE OF THE
ACTIVITY MIGRATING FROM SOUTH TO NORTH AHEAD OF THE OVERALL FLOOD
THREAT. THE ICE JAM ACTIVITY HAS BEEN RATHER PREDICTABLE FOR THIS
EVENT...WITH THE MAJORITY OF THE EVENTS OCCURRING WITHIN 12 TO 24
HRS AFTER STREAMS BEGIN TO RISE. THE ICE JAM ACTIVITY HAS BEEN MORE
PROLIFIC THAN NORMAL...WHICH WAS EXPECTED. THE ICE HAS BECOME
THICKER THAN NORMAL...DUE TO OUR COLDER THAN NORMAL WINTER...WITH
THICKNESSES EXCEEDING 12 TO 18 INCHES IN SOME LOCATIONS. THE ICE JAM
HOT SPOTS TODAY HAVE INCLUDED BUT ARE NOT LIMITED TO THE FORT DODGE
AREA...AS WELL AS VARIOUS LOCATIONS IN THE CEDAR RIVER BASIN
UPSTREAM OF WATERLOO. DUE TO THE WIDESPREAD POTENTIAL FOR FLASH
FLOODING FROM THE JAMS...WE ELECTED TO ISSUE A FLASH FLOOD WATCH FOR
COUNTIES ALONG AND NORTH OF U.S. HWY 20.

WE WILL HAVE TO CONTINUE MONITORING THE NEXT WX SYSTEM TO AFFECT OUR
CWA FRIDAY NIGHT INTO SATURDAY. OUR PRESENT RIVER FORECASTS DO
INCLUDE EXPECTED RAINFALL FROM THIS SYSTEM. AS THE FORECASTS
SHOW...WE DO NOT EXPECT THE RAIN TO ADD SIGNIFICANTLY TO THE CRESTS
LIKE WHAT HAPPENED IN 2008 IN SOME LOCATIONS.

REGARDLESS OF HOW MUCH RAIN FALLS THIS WEEKEND...HOWEVER...MANY
STREAMS WILL BE SLOWER THAN NORMAL TO RECEDE POST-CREST AND FALL
BELOW STAGE...AS THE RUNOFF FROM SNOW MELT AS WELL AS EXCESS SOIL
MOISTURE TAKES A WHILE TO FINDS THEIR WAY INTO THE STREAMS.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...

FLASH FLOOD WATCH THROUGH SATURDAY MORNING FOR NORTH CENTRAL IOWA.

&&

SHORT TERM...FAB
AVIATION...PODRAZIK
LONG TERM...DONAVON
HYDROLOGY...ZOGG

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
703 PM CST FRI MAR 12 2010

IAZ044>050-057>062-070>075-081>086-092>097-140115-
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-
703 PM CST FRI MAR 12 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TONIGHT

FLOODING WILL CONTINUE THROUGH SATURDAY...ESPECIALLY IN RIVER
BASINS NORTH OF INTERSTATE 80. FLOOD WARNINGS ARE IN EFFECT IN
MANY AREAS. PLEASE SEE OUR WEBSITE AT WEATHER.GOV/DESMOINES FOR
DETAILS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

LOCALLY DENSE FOG IS POSSIBLE SATURDAY NIGHT.  FLOODING WILL
PERSIST INTO THE WEEKEND AS SNOW MELT CONTINUES AND RUNOFF FLOWS
INTO RIVERS. FLOOD WARNINGS ARE IN EFFECT IN MANY AREAS. PLEASE
SEE OUR WEBSITE AT WEATHER.GOV/DESMOINES FOR DETAILS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED...HOWEVER ANY REPORTS OF
FLOODING AND ICE JAMS ARE ENCOURAGED AND GREATLY APPRECIATED.

IAZ004>007-015>017-023>028-033>039-140115-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN-
WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-
703 PM CST FRI MAR 12 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TONIGHT

ICE JAMS REMAIN POSSIBLE THROUGH TONIGHT AND FLOODING WILL ALSO
CONTINUE TO INCREASE. A FLASH FLOOD WATCH AND FLOOD WARNINGS ARE
IN EFFECT FOR MANY AREAS. PLEASE SEE OUR WEBSITE AT
WEATHER.GOV/DESMOINES FOR DETAILS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

LOCALLY DENSE FOG IS POSSIBLE SATURDAY NIGHT.  FLOODING IS
EXPECTED TO PERSIST ACROSS MUCH OF THE AREA THROUGH THE WEEKEND.
FLOOD WARNINGS ARE IN EFFECT IN SOME AREAS. PLEASE SEE OUR WEBSITE
AT WEATHER.GOV/DESMOINES FOR DETAILS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED...HOWEVER ANY REPORTS OF
FLOODING AND ICE JAMS ARE ENCOURAGED AND GREATLY APPRECIATED.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
738 PM CST FRI MAR 12 2010

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

0725 PM     FLASH FLOOD      4 NNW FORT DODGE        42.56N 94.21W
03/12/2010                   WEBSTER            IA   TRAINED SPOTTER

            FLASH FLOOD DUE TO ICE JAM ALONG THE DES MOINES RIVER
            NEAR FORT DODGE. TWO TO THREE FEET OF FLOWING WATER
            THROUGHOUT THE BREEN ADDITION JUST NORTH OF FORT
            DODGE...WITH SEVERAL HOUSES RECEIVING WATER UP TO THE
            FIRST PANEL OF GARAGE DOORS.

&&

PODRAZIK

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1057 PM CST FRI MAR 12 2010

IAZ004-005-015-023-033-034-044-130700-
EMMET-KOSSUTH-PALO ALTO-POCAHONTAS-SAC-CALHOUN-CRAWFORD-
INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...EMMETSBURG...
POCAHONTAS...SAC CITY...ROCKWELL CITY...DENISON
1057 PM CST FRI MAR 12 2010

AREAS OF DENSE FOG WILL AFFECT MUCH OF THE AREA THROUGH THE
OVERNIGHT HOURS. VISIBILITY MAY BECOME REDUCED TO LESS THAN ONE
HALF MILE AT TIMES WITH SOME LOCALIZED AREAS RECEIVING VISIBILITY
LESS THAN ONE QUARTER OF A MILE.

TRAVELERS ARE URGED TO EXERCISE CAUTION...ALLOW EXTRA TIME TO
REACH THEIR DESTINATION SAFELY. USE LOW BEAM HEADLIGHTS AND ALLOW
FOR EXTRA STOPPING DISTANCE AND EXTRA SPACE BETWEEN VEHICLES.

KLP