Alert archive / Iowa / Flash Flood Warnings in 2015

Flash Flood Warning 33, NWS Des Moines, IA

August 28, 2015Black Hawk County, Iowa

NWS Des Moines, IA issued this flash flood warning at Aug 28, 2015, 3:15 PM CDT for Black Hawk 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: Aug 28, 2015, 3:15 PM CDT (20:15 UTC)
Expired: Aug 28, 2015, 9:15 PM CDT
In force: 6 hr
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Flood severity: None

County Black Hawk County, IA

The radar

The Des Moines radar (KDMX), 140 km from the middle of the area, began a volume at 20:15 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
Aug 28, 4:30 PM CDT	HEAVY RAIN 3.6	2 Nw Cedar Falls, IA	REPORT VIA SOCIAL MEDIA.
Aug 28, 5:00 PM CDT	FLOOD	Cedar Falls, IA	MINOR STREET FLOODING ACROSS CEDAR FALLS AND WATERLOO DUE TO HEAVY RAIN. A FEW STALLED CARS IN LOW INTERSECTIONS.
Aug 28, 5:00 PM CDT	HEAVY RAIN 0	Cedar Falls, IA	MINOR STREET FLOODING ACROSS CEDAR FALLS AND WATERLOO DUE TO HEAVY RAIN. A FEW STALLED CARS IN LOW INTERSECTIONS.
Aug 28, 5:00 PM CDT	HEAVY RAIN 3.37	1 Ene Waterloo, IA	CORRECTION TO PREVIOUS REPORT. WATERLOO AIRPORT ASOS. EVENT TOTAL THUS FAR.
Aug 28, 5:00 PM CDT	HEAVY RAIN 3.76	1 Ene Waterloo, IA	WATERLOO AIRPORT ASOS. EVENT TOTAL THUS FAR.
Aug 28, 5:20 PM CDT	HEAVY RAIN 2.6	1 Sw Evansdale, IA	EVENT TOTAL THUS FAR. REPORTED VIA SOCIAL MEDIA.
Aug 28, 5:30 PM CDT	HEAVY RAIN 2.9	1 S Hudson, IA	STORM TOTAL.
Aug 28, 6:16 PM CDT	HEAVY RAIN 3.1	1 Ene Waterloo, IA	MEASURED AT THE KWWL STUDIO. EVENT TOTAL.
Aug 28, 6:16 PM CDT	HEAVY RAIN 3.1	1 Ne Waterloo, IA	MEASURED AT THE KWWL STUDIO. EVENT TOTAL.

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

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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

Davenport, (KDVN), launched 12:00Z, 8.3 hours before the alert went out and 177 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: 1101 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: -6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

729 
WGUS53 KDMX 282015
FFWDMX
IAC013-290215-
/O.NEW.KDMX.FF.W.0033.150828T2015Z-150829T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
315 PM CDT FRI AUG 28 2015

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BLACK HAWK COUNTY IN NORTHEASTERN IOWA...

* UNTIL 915 PM CDT FRIDAY
    
* AT 312 PM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE 
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY AND IS 
  ANTICIPATED DURING RUSH HOUR TRAFFIC THIS AFTERNOON.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  WATERLOO...CEDAR FALLS...EVANSDALE...JESUP...LA PORTE CITY...
  HUDSON...ELK RUN HEIGHTS...WATERLOO MUNICIPAL AIRPORT...CROSSROADS
  MALL...UNI-DOME AND MCLEOD CENTER...WASHBURN...DUNKERTON...
  RAYMOND...GILBERTVILLE AND GEORGE WYTH STATE PARK.

ADDITIONAL RAINFALL AMOUNTS OF 3 TO 4 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

KEEP CHILDREN AWAY FROM STORM DRAINS...CULVERTS...CREEKS AND STREAMS.
WATER LEVELS CAN RISE RAPIDLY AND SWEEP CHILDREN AWAY.

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

&&

LAT...LON 4230 9253 4247 9253 4247 9255 4258 9255
      4264 9208 4247 9208 4247 9206 4230 9206

$$

PODRAZIK

2 follow-up statements

906 
WGUS73 KDMX 282215
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
515 PM CDT FRI AUG 28 2015

IAC013-290215-
/O.CON.KDMX.FF.W.0033.000000T0000Z-150829T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BLACK HAWK IA-
515 PM CDT FRI AUG 28 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FRIDAY
FOR BLACK HAWK COUNTY...

AT 512 PM CDT...LOCAL LAW ENFORCEMENT REPORTED MINOR STREET FLOODING 
IN THE CEDAR FALLS AND WATERLOO AREA. OVER THREE INCHES OF RAIN HAVE 
ALREADY FALLEN ACROSS MUCH OF THE COUNTY. WHILE THE HEAVIEST RAINS 
HAVE PUSHED SOUTH AND EAST OF THE COUNTY...FLOODING CONCERNS WILL 
REMAIN AN ISSUE FOR MUCH OF THE EVENING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
WATERLOO...CEDAR FALLS...EVANSDALE...JESUP...LA PORTE CITY...
HUDSON...ELK RUN HEIGHTS...WATERLOO MUNICIPAL AIRPORT...CROSSROADS
MALL...UNI-DOME AND MCLEOD CENTER...WASHBURN...DUNKERTON...RAYMOND...
GILBERTVILLE AND GEORGE WYTH STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4230 9253 4247 9253 4247 9255 4258 9255
      4264 9208 4247 9208 4247 9206 4230 9206

$$

SKOW

285 
WGUS73 KDMX 290207
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
907 PM CDT FRI AUG 28 2015

IAC013-290216-
/O.EXP.KDMX.FF.W.0033.000000T0000Z-150829T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BLACK HAWK IA-
907 PM CDT FRI AUG 28 2015

...THE FLASH FLOOD WARNING FOR BLACK HAWK COUNTY WILL EXPIRE AT 915
PM CDT...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO 
POSE A THREAT. A FEW ROADS MAY STILL HAVE MINOR WATER ISSUES DUE TO 
POOR DRAINAGE AND DRIVERS SHOULD BE CAREFUL IF THEY ENCOUNTER ANY 
STANDING WATER.

LAT...LON 4230 9253 4247 9253 4247 9255 4258 9255
      4264 9208 4247 9208 4247 9206 4230 9206

$$

SKOW

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 Aug 28, 1:07 PM CDT, 2 hours 8 minutes earlier.

Area forecast discussion, Aug 28, 1:07 PM CDT, 2 hours 8 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
107 PM CDT FRI AUG 28 2015

...UPDATED AVIATION DISCUSSION...

.SHORT TERM /TODAY/...
ISSUED AT 330 AM CDT FRI AUG 28 2015

PRECIP TRENDS WILL BE THE STRAIGHT FORWARD FORECAST ISSUE TODAY WITH
SOME TEMP REBOUND CONCERNS AS WELL. UPPER LEVEL FLOW WILL CONTINUE
TO AMPLIFY TODAY WITH PASSAGE OF MID LEVEL WAVE THROUGH THE MO
VALLEY. BOTH KINEMATIC AND THERMODYNAMIC FORCING ARE STRONGLY NOTED
WITH SOME RIGHT ENTRANCE REGION SUPPORT FROM WI/MI SPEED MAX AND
DPVA AHEAD OF ERN NE SHORT WAVE MECHANICALLY. FAIRLY DECENT
BAROCLINIC ZONE IS ALSO NOTED ON 305K ISENT SURFACE WITH NAM
DEPICTING OVER 100 MB OF LIFT ACROSS IA BY 12Z WITH 40-50KTS OF
FLOW. THIS RESULTS IN VERY STRONG MOISTURE TRANSPORT AND ASSOCIATED
CONVERGENCE ZONES...WHICH MOVE SLOWLY ACROSS IA REACHING NERN
SECTIONS BY EARLY AFTERNOON.  ALTHOUGH THE FORCING IS STRONG WITH
PWATS AND WARM CLOUD DEPTHS SEASONALLY HIGH SUGGESTING HIGH RAINFALL
EFFICIENCY...THE LACK OF INSTABILITY WILL HOLD THINGS BACK SOMEWHAT
WITH CONVECTION ONLY EMBEDDED WITHIN LARGER STRATIFORM AREA.
RAINFALL AMOUNTS WILL STILL EXCEED AN INCH IN MANY LOCATIONS HOWEVER
WITH POSSIBLY OVER TWO INCHES IN THE CENTRAL AND ERN I80 TO HIGHWAY
20 ZONES.  AGREE WITH WPC QPF ASSESSMENT FAVORING THIS FARTHER SOUTH
MAX AXIS.  DO NOT FEEL RAINFALL RATES WILL BE SUFFICIENT TO JUSTIFY
ANY HEADLINES AT THIS POINT HOWEVER.

TEMP REBOUND WILL BE SOMEWHAT OF A MINOR CONCERN. SOUNDINGS SUGGEST
THERE MAY BE A LITTLE MIXING BOOST IN THE WARM SECTOR FOR S CENTRAL
AND SERN SECTIONS BY AFTERNOON BEHIND THE MAIN PRECIP SHIELD...WHICH
MAY ALSO REDEVELOP SOME SHOWERS OR ISOLD STORMS...BUT CLOUDS AND
PRECIP SHOULD OFFSET TOO MUCH OF A REBOUND SO STAYED CLOSER TO
WARMER MOS RATHER THAN WHAT SOME RAW TEMPS SUGGEST. ACROSS THE
NORTH...CLOUDS PRECIP AND AN UNFAVORABLE MORE ELY WIND SHOULD KEEP
ANY REBOUND TO A MINIMUM. HOWEVER SHEAR MOISTURE ADDITION FROM
PRECIP AND TRANSPORT SHOULD NUDGE THINGS UP SEVERAL DEGREES DURING
THE HEATING OF THE DAY.

.LONG TERM /TONIGHT THROUGH THURSDAY/...
ISSUED AT 330 AM CDT FRI AUG 28 2015

FOCUS IS MAINLY ON TEMPERATURES THROUGHOUT THE PERIOD...AND POPS
TONIGHT. SFC LOW ASSOCIATED WITH THE STRONG SHORTWAVE TROUGH
DROPPING THROUGH THE REGION TODAY INTO TONIGHT...WILL BE CENTERED
NEAR DES MOINES BY 00Z THIS EVENING. MUCH OF THE PRECIP EXPECTED TO
BE ON THE WARM SIDE OF THE LOW AND THUS AS THE SFC TROUGH AXIS
SHOVES EASTWARD THROUGH THE CWA TONIGHT...EXPECT PRECIP CHANCES TO
DIMINISH. HIGHER LOW LEVEL MOISTURE NOTED WITH THE MODELS SO DO
EXPECT AN AREA OF LINGERING LOW STRATUS ACROSS MUCH OF THE CWA INTO
EARLY SATURDAY WITH THE CLOUD DECK SLOWLY ERODING/PUSHING ESE
THROUGH THE DAY. WITH ALL THE RESIDUAL MOISTURE AROUND AFTER THE
RAIN...SOME CLEARING POSSIBLE ACROSS THE FAR WEST TONIGHT...AND
LIGHTER WINDS SETTING IN COULD SEE SOME FOG DEVELOPMENT. PREVIOUS
GRIDS HAD IT MENTIONED ACROSS THE WESTERN THIRD OF THE CWA...SO
STUCK WITH THAT AREAL COVERAGE BUT DID EXTEND THE MENTION INTO
SATURDAY MORNING. OTHERWISE LARGE UPPER RIDGE ACROSS THE CENTRAL US
TO AMPLIFY INTO BUILD EASTWARD INTO NEXT WEEK. THIS WILL BRING
WARMING AS THE THERMAL RIDGE BUILDS INTO THE AREA AND MAINLY DRY
CONDITIONS. MODELS TRY TO BRING A FEW IMPULSES MOVING THROUGH THE
RIDGE TUESDAY NIGHT AND AGAIN WEDNESDAY NIGHT...AND MAY SEE AN
ISOLATED SHOWER/THUNDERSTORM. BETTER CHANCES TO THE NORTH AND WEST.
THEREFORE DID KEEP MUCH OF THE PERIOD DRY WITH JUST SOME SLIGHT
CHANCE POPS ACROSS THE FAR NORTHWEST TUESDAY NIGHT.

H85 TEMPS COOLER TO BEGIN THE PERIOD IN THE TEENS CELSIUS WITH
LINGERING CLOUD COVER INTO SATURDAY ESPECIALLY ACROSS THE EAST.
THEREFORE KEPT TEMPS A BIT COOLER IN THE MID TO UPPER 70S. AS THE
WARMER AIRMASS BUILDS INTO THE REGION AND H85 TEMPS EXPECTED TO PUSH
INTO THE LOW TO MID 20S CELSIUS TOWARD MID/LATE WEEK HAVE HIGHS
WARMING INTO THE MID TO UPPER 80S AND LOWS IN THE 60S. DEWPOINTS
ALSO EXPECTED TO INCREASE BACK INTO THE MID TO UPPER 60S TOWARD NEXT
WEEK MAKING THINGS FEEL A BIT MORE HUMID.

&&

.AVIATION...28/18Z
ISSUED AT 105 PM CDT FRI AUG 28 2015

IFR TO MVFR STRATUS WILL PERSIST THROUGH THE AFTERNOON AND INTO
THE OVERNIGHT HOURS. MCW/ALO HAVE THE BEST SHOT OF IFR VIS WRT TO
HEAVY RAIN THIS AFTERNOON. OTHERWISE...EXPECTING FOG/STRATUS TO
CONTINUE OVERNIGHT INTO SATURDAY MORNING AND HAVE MENTION OF IFR
CONDITIONS PAST 06Z SATURDAY.

&&

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

&&

SHORT TERM...SMALL
LONG TERM...BEERENDS
AVIATION...PODRAZIK

Hazardous weather outlook, Aug 28, 5:30 AM CDT, 9 hours 45 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
530 AM CDT FRI AUG 28 2015

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-291000-
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-
530 AM CDT FRI AUG 28 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TODAY AND TONIGHT

ISOLATED NON-SEVERE THUNDERSTORMS EXPECTED TODAY INTO TONIGHT.
LOCALLY HEAVY RAINFALL IS POSSIBLE.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

MJB

In the hours before

Local storm report, Aug 28, 2:17 PM CDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
217 PM CDT FRI AUG 28 2015

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

0141 PM     FLOOD            JEWELL                  42.31N 93.64W
08/28/2015                   HAMILTON           IA   LAW ENFORCEMENT

            WEBSTER COUNTY SHERIFF REPORTED WATER OVER
            HWY 69 AT JEWELL.

&&

NWS DES MOINES IA
IRIS SYSTEM

Local storm report, Aug 28, 2:27 PM CDT, 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
227 PM CDT FRI AUG 28 2015

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

0215 PM     HEAVY RAIN       JEWELL                  42.31N 93.64W
08/28/2015  M5.06 INCH       HAMILTON           IA   PUBLIC

            REPORT VIA SOCIAL MEDIA

&&

NWS DES MOINES IA
IRIS SYSTEM

Local storm report, Aug 28, 3:04 PM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
304 PM CDT FRI AUG 28 2015

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

0244 PM     FLASH FLOOD      DAYTON                  42.26N 94.07W
08/28/2015                   WEBSTER            IA   PUBLIC

            MAJOR FLASH FLOODING ONGOING THROUGHOUT THE
            TOWN OF DAYTON DUE TO THE SKILLET CREEK.
            FAIRGROUNDS, LOCAL GOLF COURSE, AND
            CAMPGROUND ALL INUNDATED WITH AT LEAST 5
            FEET OF FLOWING WATER. REPORT VIA SOCIAL
            MEDIA.

0226 PM     FLASH FLOOD      4 SSE STANHOPE          42.24N 93.76W
08/28/2015                   HAMILTON           IA   PUBLIC

            D65 WEST OF RANDALL HAS BEEN TOPPED WITH
            WATER FLOWING OVER IT IN A COUPLE OF SPOTS.
            WATER ALSO OVER SEVERAL OTHER COUNTY ROADS
            WEST OF RANDALL. REPORT VIA SOCIAL MEDIA.

&&

NWS DES MOINES IA
IRIS SYSTEM

Local storm report, Aug 28, 3:11 PM CDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
311 PM CDT FRI AUG 28 2015

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

0235 PM     HEAVY RAIN       STANHOPE                42.29N 93.80W
08/28/2015  M6.20 INCH       HAMILTON           IA   MESONET

            TOTAL SINCE 5AM. CITY OF AMES ALERT STATION.

&&

JAZ

Local storm report, Aug 28, 3:12 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
312 PM CDT FRI AUG 28 2015

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

0235 PM     HEAVY RAIN       ELLSWORTH               42.31N 93.58W
08/28/2015  M5.00 INCH       HAMILTON           IA   MESONET

            TOTAL SINCE 5AM. CITY OF AMES ALERT STATION.

&&

JAZ

Local storm report, Aug 28, 3:14 PM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
314 PM CDT FRI AUG 28 2015

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

0235 PM     HEAVY RAIN       6 NE FRASER             42.18N 93.88W
08/28/2015  M5.60 INCH       BOONE              IA   MESONET

            TOTAL SINCE 5AM. CITY OF AMES ALERT STATION.

&&

JAZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 12:32 PM CDT	Flash Flood Warning	DMX	Boone, Greene, Hamilton, Hardin, Story, Webster	6 hr
Aug 28, 2:52 PM CDT	Flash Flood Warning	DMX	Grundy, Hardin	6 hr
Aug 28, 3:01 PM CDT	River Flood Warning	DMX	Story	61 hr
Aug 28, 3:01 PM CDT	River Flood Warning	DMX	Polk, Story	64 hr
Aug 28, 6:31 PM CDT	Areal Flood Warning	DMX	Boone, Greene, Hamilton, Hardin, Story, Webster	24 hr

Nearby

Flash Flood Warnings in Iowa, 2015 Every flash flood warning in 2015

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.