Alert archive / Iowa / Flash Flood Warnings in 2008

Flash Flood Warning 51, NWS Des Moines, IA

June 7, 2008Franklin County, Hamilton County, Hardin County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jun 7, 2008, 9:20 PM CDT for Franklin County, Hamilton County, Hardin County, Iowa. It was in force for 6 hr. 9 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 7, 2008, 9:20 PM CDT (02:20 UTC)
Expired: Jun 8, 2008, 3:15 AM CDT
In force: 6 hr
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Flood severity: None

Counties Franklin County, IA, Hamilton County, IA, Hardin County, IA

The radar

The Des Moines radar (KDMX), 95 km from the middle of the area, began a volume at 02:23 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jun 7, 10:52 PM CDT	FLASH FLOOD	8 S Hampton, IA	HIGHWAY 65 8 MILES SOUTH OF HAMPTON PARTIALLY COVERED WITH WATER.
Jun 7, 11:30 PM CDT	FLASH FLOOD	Kamrar, IA	NUMEROUS ROADS IMPASSIBLE ACROSS HAMILTON COUNTY DUE TO FLASH FLOODING, INCLUDING INTERSTATE 35 NEAR MM 141, HIGHWAY 69 AND D41.
Jun 7, 11:51 PM CDT	HEAVY RAIN 3.18	Alden, IA	WATER IN RESIDENTIAL BASEMENTS.
Jun 8, 1:08 AM CDT	HEAVY RAIN 4.56	Alden, IA
Jun 8, 1:25 AM CDT	FLASH FLOOD	3 W Iowa Falls, IA	WATER OVER THE ROAD ON COUNTY HWY D20 BETWEEN IOWA FALLS AND ALDEN.
Jun 8, 1:26 AM CDT	FLASH FLOOD	Iowa Falls, IA	HWY 65 COVERED BY WATER NEAR THE RAILROAD UNDERPASS IN IOWA FALLS.
Jun 8, 1:41 AM CDT	HEAVY RAIN 4.79	Alden, IA	RAINFALL SINCE MIDNIGHT IN THE ALDEN AREA.
Jun 8, 1:46 AM CDT	HEAVY RAIN 4.2	Iowa Falls, IA	RAINFALL IN LAST ONE HOUR AND 22 MINUTES.
Jun 8, 3:00 AM CDT	HEAVY RAIN 4.75	Alden, IA	NUMEROUS ROADS IN ALDEN FLOODED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 4 storm reports to this flash flood warning; the first came 92 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.3 hours before the alert went out and 253 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1710 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: 288 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS53 KDMX 080220
FFWDMX
IAC069-079-083-080815-
/O.NEW.KDMX.FF.W.0051.080608T0220Z-080608T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
920 PM CDT SAT JUN 7 2008

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HAMILTON COUNTY IN CENTRAL IOWA...
  HARDIN COUNTY IN CENTRAL IOWA...
  FRANKLIN COUNTY IN NORTH CENTRAL IOWA...

* UNTIL 315 AM CDT

* AT 919 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WEBSTER    
  CITY...SHEFFIELD...IOWA FALLS AND HAMPTON...AND WILLIAMS.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL FROM A LINE OF THUNDERSTORMS 
MOVING THROUGH THE WARNED AREA WILL CAUSE FLOODING OF SMALL CREEKS 
AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS 
AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW 
LYING AREAS ARE SUBJECT TO FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS THAT 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 4290 9303 4222 9302 4221 9393 4248 9392
      4249 9397 4255 9397 4255 9349 4290 9349
TIME...MOT...LOC 0220Z 180DEG 0KT 4243 9343

$$

5 follow-up statements

000 
WGUS73 KDMX 080403
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1101 PM CDT SAT JUN 7 2008

IAC069-079-083-080815-
/O.CON.KDMX.FF.W.0051.000000T0000Z-080608T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRANKLIN IA-HAMILTON IA-HARDIN IA-
1101 PM CDT SAT JUN 7 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 AM CDT FOR
HARDIN...HAMILTON AND FRANKLIN COUNTIES...

AT 1100 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED A NUMEROUS 
ROADS FLOODED THROUGHOUT THE WARNED AREA INCLUDING INTERSTATE 35 
NEAR MILE MARKER 141. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WEBSTER 
CITY...SHEFFIELD...IOWA FALLS...HAMPTON...AND KAMRAR.

ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN THE 
WARNED AREA THROUGH 1200 AM CDT.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT SUNDAY MORNING FOR
IOWA.

LAT...LON 4290 9303 4222 9302 4221 9393 4248 9392
      4249 9397 4255 9397 4255 9349 4290 9349
TIME...MOT...LOC 0401Z 180DEG 0KT 4243 9343

$$

ALBRECHT

000 
WGUS73 KDMX 080437
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1135 PM CDT SAT JUN 7 2008

IAC069-079-083-080815-
/O.CON.KDMX.FF.W.0051.000000T0000Z-080608T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRANKLIN IA-HAMILTON IA-HARDIN IA-
1135 PM CDT SAT JUN 7 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 AM CDT FOR
HARDIN...HAMILTON AND FRANKLIN COUNTIES...

AT 1130 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH 
FLOODING OVER THE WARNED AREA...WITH NUMEROUS ROADS UNDER WATER OR 
WASHED OUT. THIS INCLUDES PORTIONS OF INTERSTATE 35 NEAR MILE MARKER 
141 AND HWY 65 8 MILES SOUTH OF HAMPTON. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WEBSTER 
CITY...SHEFFIELD...IOWA FALLS...KAMRAR AND HAMPTON

ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN THE 
WARNED AREA THROUGH 100 AM CDT.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT SUNDAY MORNING FOR
IOWA.

LAT...LON 4290 9303 4222 9302 4221 9393 4248 9392
      4249 9397 4255 9397 4255 9349 4290 9349
TIME...MOT...LOC 0435Z 180DEG 0KT 4243 9343

$$

ALBRECHT

000 
WGUS73 KDMX 080543
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1241 AM CDT SUN JUN 8 2008

IAC069-079-083-080815-
/O.CON.KDMX.FF.W.0051.000000T0000Z-080608T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRANKLIN IA-HAMILTON IA-HARDIN IA-
1241 AM CDT SUN JUN 8 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 AM CDT FOR
HARDIN...HAMILTON AND FRANKLIN COUNTIES...

AT 1239 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED A
THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED AREA.

THIS IS A DANGEROUS AND LIFE THREATENING FLOODING SITUATION. 

AT 1242 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS CONTINUED TO  
REPORTED FLASH FLOODING OVER THE WARNED AREA...WITH NUMEROUS ROADS 
UNDER WATER OR WASHED OUT. THIS INCLUDES PORTIONS OF INTERSTATE 35 
NEAR MILE MARKER 141 AND HWY 65 8 MILES SOUTH OF HAMPTON. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WEBSTER
CITY...SHEFFIELD...IOWA FALLS AND HAMPTON

ADDITIONAL RAINFALL AMOUNTS OF ONE TO THREE INCHES ARE POSSIBLE IN 
THE WARNED AREA OVERNIGHT.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

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

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...
EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER
GROUND.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT SUNDAY MORNING FOR
IOWA.

LAT...LON 4290 9303 4222 9302 4221 9393 4248 9392
      4249 9397 4255 9397 4255 9349 4290 9349
TIME...MOT...LOC 0541Z 180DEG 0KT 4243 9343

$$

ALBRECHT

000 
WGUS73 KDMX 080651
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
147 AM CDT SUN JUN 8 2008

IAC069-079-083-080815-
/O.CON.KDMX.FF.W.0051.000000T0000Z-080608T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRANKLIN IA-HAMILTON IA-HARDIN IA-
147 AM CDT SUN JUN 8 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 AM CDT FOR
HARDIN...HAMILTON AND FRANKLIN COUNTIES...

AT 143 AM CDT...NATIONAL WEATHER SERVICE RADAR ESTIMATES WIDESPREAD 
AMOUNTS OF FOUR TO FIVE INCHES OF RAIN HAS FALLEN OVER THE WARNED 
AREA CAUSING A DANGEROUS AND LIFE THREATENING FLASH FLOODING 
SITUATION OVER THE WARNED AREA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WEBSTER 
CITY...SHEFFIELD...IOWA FALLS...WILLIAMS...KAMRAR...ALDEN AND HAMPTON

LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH FLOODING OVER THE 
WARNED AREA...WITH NUMEROUS ROADS UNDER WATER OR WASHED OUT. THIS 
INCLUDES PORTIONS OF INTERSTATE 35 NEAR MILE MARKER 141 AND HWY 65 8 
MILES SOUTH OF HAMPTON. 

IN ADDITION...DURING HEAVY RAINS HIGHWAY 65 NORTH OF HAMPTON IS 
PRONE TO FLASH FLOODING. THE PUBLIC HAS REPORTED NUMEROUS GRAVEL 
ROADS HAVING BEEN WASHED OUT IN THE ACKLEY AREA. 

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

LAT...LON 4290 9303 4222 9302 4221 9393 4248 9392
      4249 9397 4255 9397 4255 9349 4290 9349
TIME...MOT...LOC 0647Z 180DEG 0KT 4243 9343

$$

RUSSELL

000 
WGUS73 KDMX 080745
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
244 AM CDT SUN JUN 8 2008

IAC069-079-083-080815-
/O.CON.KDMX.FF.W.0051.000000T0000Z-080608T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRANKLIN IA-HAMILTON IA-HARDIN IA-
244 AM CDT SUN JUN 8 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 AM CDT FOR
HARDIN...HAMILTON AND FRANKLIN COUNTIES...

AT 240 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED A
THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED AREA.

TRAINED SPOTTERS HAVE REPORTED NEARLY FOUR TO 5 INCHES IN THE ALDEN 
AND IOWA FALLS AREAS...WITH THESE AMOUNTS EXPECTED TO BE QUITE 
COMMON CAUSING A DANGEROUS AND LIFE THREATENING FLASH FLOODING 
SITUATION OVER THE WARNED AREA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WEBSTER 
CITY...SHEFFIELD...IOWA FALLS...WILLIAMS...KAMRAR...ALDEN AND HAMPTON

LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH FLOODING OVER THE 
WARNED AREA...WITH NUMEROUS ROADS UNDER WATER OR WASHED OUT. THIS 
INCLUDES PORTIONS OF INTERSTATE 35 NEAR MILE MARKER 141 AND HWY 65 8 
MILES SOUTH OF HAMPTON. 

IN ADDITION...DURING HEAVY RAINS HIGHWAY 65 NORTH OF HAMPTON IS 
PRONE TO FLASH FLOODING. THE PUBLIC HAS REPORTED NUMEROUS GRAVEL 
ROADS HAVING BEEN WASHED OUT IN THE ACKLEY AREA. 

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

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT SUNDAY MORNING FOR
IOWA.

LAT...LON 4290 9303 4222 9302 4221 9393 4248 9392
      4249 9397 4255 9397 4255 9349 4290 9349
TIME...MOT...LOC 0744Z 180DEG 0KT 4243 9343

$$

RUSSELL

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Des Moines, IA wrote its last area forecast discussion before this flash flood warning went out at Jun 7, 6:30 PM CDT, 2 hours 50 minutes earlier.

Area forecast discussion, Jun 7, 6:30 PM CDT, 2 hours 50 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE DES MOINES IA
630 PM CDT SAT JUN 7 2008

.UPDATED 08/00Z AVIATION DISCUSSION...

.DISCUSSION...
HAVE UPDATED ZONES TO REFLECT THE INCREASED SFC WINDS ACROSS THE
AREA. INFLOW NOW UP TO 40 MPH AT TIMES THOUGH WINDS SHOULD DROP A
BIT AFTER SUNSET...SOME GUSTS AND INFLOW SHOULD CONTINUE.

.PREVIOUS DISCUSSION...
CONTINUED THREAT FOR SEVERE WEATHER ACROSS THE REGION FOR TONIGHT
WITH WARM FRONTAL BOUNDARY IN PLACE OVER THE NORTHERN AREAS OF THE
STATE...STRONG MOISTURE TRANSPORT NORTH AND APPROACHING WAVE
ENERGY.  PARAMETERS SUGGEST THAT EARLY EVENING THREAT FOR TORNADOES
WILL TRANSITION TO HEAVY RAIN AND WIND THREAT AS THE NIGHT
PROGRESSES.

AS OF MID AFTERNOON...MOST OF THE FORECAST AREA WELL IN THE WARM
SECTOR WITH INCREASING CONVERGENCE ALONG THE COLD FRONT ACROSS
EASTERN NEBRASKA AND KANSAS. FOR NOW THE MAIN SEVERE THREAT WILL BE
FOCUSED OVER NORTHERN/EASTERN SECTIONS WHERE CAP IS NOT PRESENT.
MODELS DIFFER IN CAP EROSION OVERNIGHT WITH GFS CONTINUING TO
INDICATE THE CAP WILL HOLD ACROSS THE REGION THROUGH MUCH OF THE
NIGHT WITH EURO/NAM SUGGESTING A MUCH MORE MARGINAL CAP OVER THE
AREA. WILL LEAN CONSERVATIVE FOR NOW TOWARD GREATER THUNDER
POTENTIAL AS CONVERGENCE WEST OF THE AREA IS RATHER STRONG AND BOTH
GFS/NAM CORFIDI VECTORS SUGGEST BACK BUILDING/TRAINING STORMS A
PRETTY GOOD POSSIBILITY TOWARD 06Z/12Z ACROSS THE REGION. WITH THAT
IN MIND...
HAVE EXPANDED THE FLASH FLOOD WATCH A FEW COUNTIES FARTHER
SOUTHEAST. STILL NOT A CERTAINTY FOR OVERNIGHT TONIGHT.

WITH THE MAIN WAVE ARRIVING ON SUNDAY AND SUNDAY NIGHT...WILL BE
LOOKING AT ANOTHER POSSIBLE HEAVY RAINFALL EVENT OVER SOUTHERN
PORTIONS OF THE AREA AS ANOTHER WAVE RIDES ALONG THE BOUNDARY. AFTER
TNTS STORMS EVOLVE...WILL BE REEVALUATING WHERE THE BEST PLACEMENT
OF ANY NEW FF.A WILL BE. TEMPS TO CONTINUE WARM WITH MODEST LEVELS
OF HUMIDITY OVER THE AREA. LARGE SCALE PATTERN REMAINS THE SAME FOR
THIS PACKAGE...SO AFTER A BREAK ON TUESDAY...ANOTHER WARM AIR
ADVECTION THUNDER EVENT IS POSSIBLE WED WITH MORE WET WEATHER
THROUGH THURS/FRI. TIMING OF LATTER WEEK EVENT IS STILL IN QUESTION
BUT CONTINUE TO FAVOR THE SLOWER EURO...WHICH IS NOW KEEPING STORMS
AROUND FOR FRIDAY. GIVEN CURRENT ACTIVE WX...HAVE NOT FOCUSED
HEAVILY ON EXTENDED CHANGES AND MAY HAVE TO MODIFY TIMING OF LATE
WEEK PRECIP TOMORROW. NO MAJOR CHANGES TO TEMPS FOR THE BALANCE OF
THE WEEK.

.HYDROLOGY...
DEPENDING ON THE OUTFLOW THIS EVENING POSSIBLE THAT STORMS MAY
EXTEND A BIT FARTHER SOUTH OVERNIGHT TONIGHT...MANY PARAMETERS
CONTINUE TO COME TOGETHER FOR ANOTHER ROUND OF HEAVY RAIN AND
FLOODING TONIGHT.  300-310K MOISTURE TRANSPORT IS VERY IMPRESSIVE AS
LLJ STRENGTHENS...ALONG WITH ELEVATED INSTABILITY AND HIGH END K
INDEX.  PWS AROUND 2 INCHES...MEAN WIND PARALLEL TO FRONT AND WEAK
CORFIDI VECTOR MOVEMENT ALL SUGGEST HEAVY TRAINING RAINS.  SHOULD
AGAIN BE VERY EFFICIENT WITH HIGH WCDS.  300-310K MOISTURE
CONVERGENCE IS ALL OVER THE PLACE AMONG MODELS HOWEVER SO HAVE BROAD
BRUSHED FLASH FLOOD WATCH TO BE SAFE WITH NO FAVORED LOCATIONS.
JUST ABOUT ALL AREAS ARE JUICED AND WILL NOT TAKE MUCH TO PRODUCE
ADDITIONAL FLOODING.  QPF AMOUNTS MAY NOT BE QUITE AS HIGH AS
PREVIOUS EVENTS...BUT IT WILL NOT TAKE MUCH UNFORTUNATELY. WILL
MAINTAIN THE CURRENT WATCH...BUT EXPAND A FEW COUNTIES SOUTHEAST.

&&

.AVIATION...08/00Z
THUNDERSTORMS WITH LCL MVFR TO IFR CONDITIONS IN AND AROUND TSRA.
SFC WNDS WL RMN STG FROM THE SSW GUSTING TO 35 TO 39 KTS AT TIMES
THIS EVENING.  EXPECT TSRA TO BECOME WDSPRD LATE TONIGHT WITH SEVERE
WEATHER POSSIBLE FROM THIS AFTERNOON INTO THE OVERNIGHT TIMEFRAME.
STORMS WILL CONTINUE OVER THE REGION FOR MUCH OF THE TAF
PERIOD...SLOWLY DIMINISHING FROM NW TO SE DURING THE PERIOD./REV

&&

.DMX...FLASH FLOOD WATCH TONIGHT EXPANDED SOUTHEAST TO GENERALLY
ALONG AND NW OF LAMONI-KNOXVILLE-GRINNELL LINE.

&&

SHORT TERM/AVIATION...COGIL/REV
LONG TERM...REV

Hazardous weather outlook, Jun 7, 5:11 PM CDT, 4 hours 9 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
511 PM CDT SAT JUN 7 2008

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>074-
081>084-092>094-082215-
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-ADAMS-UNION-CLARKE-
LUCAS-TAYLOR-RINGGOLD-DECATUR-
511 PM CDT SAT JUN 7 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TONIGHT

ANOTHER SIGNIFICANT THUNDERSTORM EVENT IS UNFOLDING WITH SEVERE
WEATHER AND HEAVY FLOODING RAINS POSSIBLE TONIGHT.

ALL FORMS OF SEVERE WEATHER COULD OCCUR INCLUDING LARGE HAIL
...DAMAGING WINDS...TORNADOES AND FLASH FLOODING. RAINFALL AMOUNTS
MAY REACH ONE TO TWO INCHES...AND POSSIBLY IN EXCESS OF THREE
INCHES LATER IN THE EVENING.

A FLASH FLOOD WATCH IS IN EFFECT FOR THE AREA TONIGHT. PLEASE REFER
TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR
ADDITIONAL DETAILS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

MORE THUNDERSTORMS ARE ANTICIPATED SUNDAY WITH THE CONTINUED
POTENTIAL FOR SEVERE WEATHER...HEAVY RAINS AND FLOODING.
THUNDERSTORM CHANCES OF VARIED DEGREES REMAIN IN THE FORECAST
THROUGH NEXT WEEK WITH PEAK PROBABILITIES AROUND THURSDAY...WHICH
WILL BE THE MOST LIKELY TIME FOR SEVERE WEATHER AND POSSIBLY HEAVY
RAINS AS WELL.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE NEEDED TONIGHT FOR MANY AREAS AND POSSIBLY
INTO NEXT WEEK. THE MOST ACTIVE PERIODS APPEAR TO BE TONIGHT...
SUNDAY AFTERNOON...AND AGAIN AROUND THURSDAY.

IAZ075-085-086-095>097-082215-
MAHASKA-MONROE-WAPELLO-WAYNE-APPANOOSE-DAVIS-
511 PM CDT SAT JUN 7 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST IOWA.

.DAY ONE...TONIGHT

CHANCES FOR THUNDERSTORMS RETURN TO THE FORECAST TONIGHT. IF
STORMS DO MATERIALIZE...THEY WOULD HAVE THE POTENTIAL FOR LARGE
HAIL...DAMAGING WINDS...LOCALLY HEAVY RAINS AND POSSIBLE ISOLATED
TORNADOES.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

BETTER CHANCES FOR THUNDERSTORMS EXIST SUNDAY WITH THE POTENTIAL
FOR SEVERE WEATHER...HEAVY RAINS AND FLOODING. THUNDERSTORM
CHANCES OF VARIED DEGREES REMAIN IN THE FORECAST THROUGH NEXT WEEK
WITH PEAK PROBABILITIES AROUND THURSDAY...WHICH WILL BE THE MOST
LIKELY TIME FOR SEVERE WEATHER AND POSSIBLY HEAVY RAINS AS WELL.

.SPOTTER INFORMATION STATEMENT...

THE POTENTIAL FOR SPOTTER ACTIVATION WILL EXIST THROUGH THE
WEEKEND AND THROUGH NEXT WEEK. THE MOST ACTIVE PERIODS APPEAR TO
BE SUNDAY AFTERNOON AND EVENING...AND AGAIN AROUND THURSDAY.

REV

In the hours before

Local storm report, Jun 7, 8:16 PM CDT, 1 hour 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
816 PM CDT SAT JUN 07 2008

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

0753 PM     FLASH FLOOD      FORT DODGE              42.51N 94.18W
06/07/2008                   WEBSTER            IA   TRAINED SPOTTER

            STREETS NEARLY IMPASSABLE IN TOWN...WITH MANHOLE COVERS
            LIFTING OFF DUE TO WATER.

&&

ALBRECHT

Local storm report, Jun 7, 8:26 PM CDT, 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
826 PM CDT SAT JUN 07 2008

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

0819 PM     FLASH FLOOD      FORT DODGE              42.51N 94.18W
06/07/2008                   WEBSTER            IA   TRAINED SPOTTER

            MAJOR STREET FLOODING 4 FEET DEEP FOR SEVERAL BLOCKS NEAR
            5TH AVENUE SEVERAL CARS STALLED IN FLOODWATERS

&&

BROCK

Local storm report, Jun 7, 8:42 PM CDT, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
842 PM CDT SAT JUN 07 2008

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

0800 PM     FLASH FLOOD      2 WSW CHARTER OAK       42.06N 95.63W
06/07/2008                   CRAWFORD           IA   BROADCAST MEDIA

            PUBLIC REPORTED THROUGH MEDIA WATER RUNNING OVER HWY 141.

&&

STEACHOU

Local storm report, Jun 7, 8:55 PM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
855 PM CDT SAT JUN 07 2008

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

0829 PM     TSTM WND DMG     1 W LOHRVILLE           42.27N 94.57W
06/07/2008                   CALHOUN            IA   LAW ENFORCEMENT

            TREES DOWN BLOCKING HIGHWAY N65.

0823 PM     FLASH FLOOD      WSW LAKE VIEW           42.30N 95.05W
06/07/2008                   SAC                IA   LAW ENFORCEMENT

            STREET FLOODING AT 2ND AND HIGH STREETS IN LAKE VIEW.

&&

ALBRECHT

Local storm report, Jun 7, 9:09 PM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
909 PM CDT SAT JUN 07 2008

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

0822 PM     HEAVY RAIN       2 N FORT DODGE          42.54N 94.18W
06/07/2008  E3.00 INCH       WEBSTER            IA   TRAINED SPOTTER

            DITCHES VERY FULL WINDS 40-50 MPH

0905 PM     FLASH FLOOD      FORT DODGE              42.51N 94.18W
06/07/2008                   WEBSTER            IA   LAW ENFORCEMENT

            STREET FLOODING WITH MAN HOLE COVERS OFF TRAVEL NOT
            RECOMMENDED ACROSS FLOODED AREAS

&&

BROCK

Local storm report, Jun 7, 9:12 PM CDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
912 PM CDT SAT JUN 07 2008

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

0910 PM     FLASH FLOOD      KIRON                   42.19N 95.33W
06/07/2008                   CRAWFORD           IA   LAW ENFORCEMENT

            OTTER CREEK OUT OF BANKS FROM HEAVY RAIN

&&

BROCK

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 7, 7:14 PM CDT	Tornado Warning	DMX	Humboldt, Webster, Wright	46 min
Jun 7, 7:15 PM CDT	Tornado Warning	DMX	Hamilton, Webster, Wright	45 min
Jun 7, 7:32 PM CDT	Flash Flood Warning	DMX	Crawford	6 hr
Jun 7, 7:32 PM CDT	Severe Thunderstorm Warning	DMX	Crawford, Sac	58 min
Jun 7, 7:41 PM CDT	Flash Flood Warning	DMX	Webster	6 hr
Jun 7, 8:03 PM CDT	River Flood Warning	DMX	Story	9 hr
Jun 7, 8:03 PM CDT	River Flood Warning	DMX	Story	9 hr
Jun 7, 8:17 PM CDT	Severe Thunderstorm Warning	DMX	Franklin, Wright	20 min
Jun 7, 8:23 PM CDT	Flash Flood Warning	DMX	Wright	12 hr
Jun 7, 9:24 PM CDT	River Flood Warning	DMX	Wapello	62 days
Jun 7, 9:24 PM CDT	River Flood Warning	DMX	Emmet	14 days
Jun 7, 9:24 PM CDT	River Flood Warning	DMX	Hamilton, Webster	6 days
Jun 7, 9:24 PM CDT	River Flood Warning	DMX	Polk	8 hr
Jun 7, 9:32 PM CDT	River Flood Warning	DMX	Black Hawk, Bremer	9 days
Jun 7, 9:55 PM CDT	Flash Flood Warning	DMX	Black Hawk, Bremer, Butler, Grundy	6 hr
Jun 7, 10:05 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Tama	29 min
Jun 7, 10:23 PM CDT	Areal Flood Warning	DMX	Worth	12 hr
Jun 7, 11:13 PM CDT	Severe Thunderstorm Warning	DMX	Palo Alto	33 min
Jun 7, 11:21 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk	39 min
Jun 7, 11:27 PM CDT	Flash Flood Warning	DMX	Carroll	6 hr
Jun 7, 11:59 PM CDT	Flash Flood Warning	DMX	Winnebago, Worth	6 hr
Jun 8, 12:32 AM CDT	Severe Thunderstorm Warning	DMX	Franklin, Hamilton, Hardin, Wright	43 min
Jun 8, 12:44 AM CDT	Tornado Warning	DMX	Franklin, Wright	31 min
Jun 8, 12:48 AM CDT	Areal Flood Warning	DMX	Calhoun, Pocahontas, Sac	13 hr
Jun 8, 1:08 AM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin, Grundy, Hardin	52 min
Jun 8, 1:27 AM CDT	Flash Flood Warning	DMX	Crawford	6 hr
Jun 8, 1:43 AM CDT	Flash Flood Warning	DMX	Webster	6 hr
Jun 8, 1:48 AM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer, Butler	42 min
Jun 8, 3:18 AM CDT	Severe Thunderstorm Warning	DMX	Carroll, Crawford	42 min
Jun 8, 3:30 AM CDT	Flash Flood Warning	DMX	Franklin, Hamilton, Hardin	6 hr
Jun 8, 3:37 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass	53 min
Jun 8, 3:51 AM CDT	Areal Flood Advisory	DMX	Humboldt	6 hr
Jun 8, 4:36 AM CDT	Areal Flood Warning	DMX	Cerro Gordo, Hancock	6 hr
Jun 8, 5:27 AM CDT	Areal Flood Warning	DMX	Carroll	12 hr
Jun 8, 5:40 AM CDT	Areal Flood Warning	DMX	Winnebago	12 hr
Jun 8, 6:06 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Polk, Story	24 min
Jun 8, 6:26 AM CDT	Severe Thunderstorm Warning	DMX	Madison, Warren	21 min
Jun 8, 6:37 AM CDT	Areal Flood Advisory	DMX	Boone, Dallas, Jasper, Marshall, Polk, Story	3 hr
Jun 8, 7:06 AM CDT	Areal Flood Advisory	DMX	Black Hawk, Bremer, Butler, Grundy	3 hr
Jun 8, 7:14 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Tama	46 min
Jun 8, 7:27 AM CDT	Flash Flood Warning	DMX	Boone, Dallas, Polk, Story	6 hr
Jun 8, 7:31 AM CDT	Flash Flood Warning	DMX	Jasper, Marshall	6 hr
Jun 8, 7:35 AM CDT	Areal Flood Warning	DMX	Crawford	12 hr
Jun 8, 7:41 AM CDT	Areal Flood Warning	DMX	Webster	12 hr
Jun 8, 7:58 AM CDT	Areal Flood Advisory	DMX	Madison, Warren	3 hr
Jun 8, 8:17 AM CDT	Areal Flood Warning	DMX	Wright	12 hr
Jun 8, 8:58 AM CDT	River Flood Warning	DMX	Greene	37 hr
Jun 8, 8:58 AM CDT	River Flood Warning	DMX	Polk	7 days
Jun 8, 9:04 AM CDT	Flash Flood Warning	DMX	Cerro Gordo	6 hr
Jun 8, 9:27 AM CDT	River Flood Warning	DMX	Dallas, Polk	37 hr
Jun 8, 9:44 AM CDT	River Flood Warning	DMX	Polk	7 hr
Jun 8, 9:46 AM CDT	River Flood Warning	DMX	Polk	45 hr
Jun 8, 9:59 AM CDT	Flash Flood Warning	DMX	Madison, Warren	6 hr
Jun 8, 10:53 AM CDT	Flash Flood Warning	DMX	Black Hawk	6 hr
Jun 8, 11:22 AM CDT	Areal Flood Warning	DMX	Adair, Audubon, Bremer, Butler, Calhoun, Carroll and 21 more	9 hr
Jun 8, 11:27 AM CDT	River Flood Warning	DMX	Polk	12 days
Jun 8, 12:06 PM CDT	River Flood Warning	DMX	Story	43 hr
Jun 8, 12:06 PM CDT	River Flood Warning	DMX	Story	34 hr
Jun 8, 1:37 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Cass	53 min
Jun 8, 1:42 PM CDT	River Flood Warning	DMX	Madison, Warren	42 hr
Jun 8, 1:45 PM CDT	Areal Flood Warning	DMX	Boone, Dallas, Jasper, Marshall, Polk, Story	6 hr
Jun 8, 1:56 PM CDT	Flash Flood Warning	DMX	Cass	5 hr
Jun 8, 2:03 PM CDT	Flash Flood Warning	DMX	Hancock, Kossuth, Winnebago, Worth	6 hr
Jun 8, 2:22 PM CDT	Severe Thunderstorm Warning	DMX	Greene, Hamilton, Webster	38 min
Jun 8, 2:29 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Cass, Guthrie	46 min
Jun 8, 2:36 PM CDT	Flash Flood Warning	DMX	Adair, Greene, Guthrie, Webster	5 hr
Jun 8, 2:52 PM CDT	Flash Flood Warning	DMX	Cerro Gordo	6 hr
Jun 8, 2:56 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Taylor	49 min
Jun 8, 3:11 PM CDT	Flash Flood Warning	DMX	Boone, Dallas, Hamilton, Wright	5 hr
Jun 8, 3:16 PM CDT	Flash Flood Warning	DMX	Adams, Taylor	4 hr
Jun 8, 3:27 PM CDT	Tornado Warning	DMX	Adams, Ringgold, Taylor	33 min
Jun 8, 3:32 PM CDT	Flash Flood Warning	DMX	Butler	6 hr
Jun 8, 3:48 PM CDT	Flash Flood Warning	DMX	Jasper, Marshall, Tama	4 hr
Jun 8, 4:09 PM CDT	Flash Flood Warning	DMX	Madison, Ringgold, Union	3 hr
Jun 8, 4:15 PM CDT	Tornado Warning	DMX	Marshall, Tama	45 min
Jun 8, 4:22 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Marion, Warren	38 min
Jun 8, 4:25 PM CDT	Tornado Warning	DMX	Clarke, Madison, Union	20 min
Jun 8, 4:36 PM CDT	Tornado Warning	DMX	Tama	24 min
Jun 8, 4:41 PM CDT	Flash Flood Warning	DMX	Clarke, Lucas, Marion, Warren	3 hr
Jun 8, 4:44 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Madison, Marion, Warren	24 min

Nearby

Flash Flood Warnings in Iowa, 2008 Every flash flood warning in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.