Alert archive / Iowa / Areal Flood Warnings in 2011

Areal Flood Warning 2, NWS Des Moines, IA

June 10, 2011Mahaska County, Marion County, Iowa

NWS Des Moines, IA issued this areal flood warning at Jun 10, 2011, 8:29 AM CDT for Mahaska County, Marion County, Iowa. It was in force for 24 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 10, 2011, 8:29 AM CDT (13:29 UTC)
Expired: Jun 11, 2011, 8:30 AM CDT
In force: 24 hr
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Flood severity: None

Counties Mahaska County, IA, Marion County, IA

The radar

The Des Moines radar (KDMX), 84 km from the middle of the area, began a volume at 13:32 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.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 1.5 hours before the alert went out and 200 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: 874 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: -79 m²/s²
0-3 km storm-relative helicity: -155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal 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 areal flood warning went out at Jun 10, 6:59 AM CDT, 1 hour 30 minutes earlier.

Area forecast discussion, Jun 10, 6:59 AM CDT, 1 hour 30 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
658 AM CDT FRI JUN 9 2011

.DISCUSSION...
SURFACE LOW AND FRONTAL BOUNDARY SHIFTING TO THE EAST THIS MORNING
AND SHOULD BRING AN END TO THE HEAVY RAIN AND THUNDERSTORMS BY MID
MORNING.  HOWEVER...SOME CONCERN WITH THE UPPER WAVE HANGING BACK TO
THE NORTHWEST UNTIL LATER TODAY AND SOME LINGERING INSTABILITY
ACROSS THE EAST/SOUTHEAST THAT WE MAY STILL SEE A FEW SHOWERS OR
STORMS AROUND LATER THIS AFTERNOON.  WATER VAPOR SHOWING A COUPLE
WEAK VORT MAXES AS WELL OVER SW MN  AND A COUPLE MORE FURTHER WEST.
AS A RESULT...GENERALLY KEPT ISOLATED TO SCATTERED WORDING IN ZONES
CLEARING FROM WEST TO EAST THROUGH THE DAY.  THE SHORTWAVE EXITS
THIS EVENING WITH HIGH PRESSURE BUILDING IN FOR A DRY PERIOD FRIDAY
NIGHT THROUGH SATURDAY NIGHT.  ANOTHER SHORT WAVE PROGGED TO PUSH
ACROSS CENTRAL IOWA LATE SATURDAY NIGHT THROUGH SUNDAY WITH A
SURFACE LOW AND WARM FRONT LIFTING INTO THE SOUTH/SOUTHWEST PART OF
THE FORECAST AREA.  THE PATTERN IS SORT OF A BROKEN RECORD WITH WARM
ADVECTION ADVANCING INTO THE STATE FOLLOWED BY A LOW LEVEL JET
FOCUSED INTO THE FRONTAL BOUNDARY AND DECENT INSTABILITY COUPLED
WITH A SHORT WAVE PASSING BY.  WE WILL AGAIN SEE MORE HEAVY RAIN
WITH THE STORMS FOR LATE IN THE WEEKEND ALONG WITH SOME MARGINAL
THREAT FOR SEVERE STORMS.  I DID NOT CHANGE ANY GRIDS BEYOND MONDAY
BUT MODELS SUGGEST ANOTHER STRONG SHORTWAVE PASSING THROUGH
TUESDAY/WEDNESDAY TIMEFRAME WITH A RIDGE FINALLY BUILDING IN FOR
MID/LATE WEEK.  UPSTREAM OF THAT HOWEVER IS YET ANOTHER STRONG
SHORTWAVE.  AS FOR TEMPS...WE WILL STAY RELATIVELY COOL THROUGH THE
WEEKEND BUT THE WARM ADVECTION FOR LATE SUNDAY WILL SURGE INTO
CENTRAL IOWA EARLY IN THE WEEK AND BEGIN TO BRING BACK MOISTURE AND
WARMER TEMPERATURES.

&&

.AVIATION...10/12Z
OUTSIDE OF VFR CIGS ACROSS THE SE QUARTER OF IA...THE REMAINDER OF
THE STATE HAD LIFR/IFR CIGS AND AREAS OF MVFR VSBYS.  AS A TROUGH OF
SURFACE LOW PRESSURE EXITS IA TODAY...IFR/MVFR CONDITIONS WILL
LINGER INTO THE NIGHT.  SCATTERED SHOWERS AND THUNDERSTORMS OVER KS
MAY REACH SRN TAF SITES LATER TODAY...KDSM/KOTM...BUT CONFIDENCE IN
TIMING AND LOCATION NOT GREAT ENOUGH TO INCLUDE BEYOND AFTERNOON AND
EVENING CB WORDING.  WINDS WILL BECOME NLY AREA WIDE TONIGHT WITH
LINGERING MVFR/IFR CIGS AND MVFR VSBYS.

&&

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

&&

DISCUSSION...FAB
AVIATION...BSS

Hazardous weather outlook, Jun 10, 4:40 AM CDT, 3 hours 49 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
440 AM CDT FRI JUN 10 2011

IAZ004>007-015>017-023>025-033>035-044-045-111200-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-SAC-CALHOUN-WEBSTER-CRAWFORD-CARROLL-
440 AM CDT FRI JUN 10 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TODAY AND TONIGHT

AN ISOLATED TO WIDELY SCATTERED NON SEVERE THUNDERSTORM IS
POSSIBLE OVER THE AREA THIS MORNING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THERE WILL BE PERIODS OF THUNDERSTORMS IN THE FORECAST FROM SUNDAY
NIGHT THROUGH TUESDAY NIGHT. IT IS TOO EARLY TO ASSESS THE SEVERE
WEATHER THREAT FOR STORMS NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

IAZ026>028-036>039-046>050-059-061-062-072-075-083>085-094>097-
111200-
FRANKLIN-BUTLER-BREMER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-GREENE-
BOONE-STORY-MARSHALL-TAMA-DALLAS-JASPER-POWESHIEK-MADISON-MAHASKA-
CLARKE-LUCAS-MONROE-DECATUR-WAYNE-APPANOOSE-DAVIS-
440 AM CDT FRI JUN 10 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TODAY AND TONIGHT

WIDELY SCATTERED THUNDERSTORMS ARE POSSIBLE OVER THE OUTLOOK AREA
TODAY. THE THREAT FOR SEVERE STORMS IS LOW.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THERE WILL BE PERIODS OF THUNDERSTORMS IN THE FORECAST FROM SUNDAY
THROUGH TUESDAY NIGHT. IT IS TOO EARLY TO ASSESS THE SEVERE
WEATHER THREAT FOR STORMS NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

IAZ060-073-074-086-111200-
POLK-WARREN-MARION-WAPELLO-
440 AM CDT FRI JUN 10 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TODAY AND TONIGHT

ISOLATED THUNDERSTORMS ARE POSSIBLE TODAY. THE THREAT FOR SEVERE
STORMS IS LOW. RIVER FLOOD WARNINGS ARE ALSO IN EFFECT FOR PORTIONS OF
THE DES MOINES RIVER VALLEY. PLEASE REFER TO THE NATIONAL WEATHER
SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THERE WILL BE PERIODS OF THUNDERSTORMS IN THE FORECAST FROM SUNDAY
THROUGH TUESDAY NIGHT. LARGE HAIL AND DAMAGING WIND ARE POSSIBLE
WITH STORMS SUNDAY NIGHT. HEAVY RAIN IS ALSO POSSIBLE.  IT IS TOO
EARLY TO ASSESS THE SEVERE WEATHER THREAT FOR STORMS EARLY NEXT
WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

IAZ057-058-070-071-081-082-092-093-111200-
AUDUBON-GUTHRIE-CASS-ADAIR-ADAMS-UNION-TAYLOR-RINGGOLD-
440 AM CDT FRI JUN 10 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TODAY AND TONIGHT

WIDELY SCATTERED THUNDERSTORMS ARE POSSIBLE OVER THE OUTLOOK AREA
TODAY. THE THREAT FOR SEVERE STORMS IS LOW.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THERE WILL BE PERIODS OF THUNDERSTORMS IN THE FORECAST FROM SUNDAY
THROUGH TUESDAY NIGHT. LARGE HAIL AND DAMAGING WIND ARE POSSIBLE
WITH STORMS SUNDAY NIGHT. HEAVY RAIN IS ALSO POSSIBLE.  IT IS TOO
EARLY TO ASSESS THE SEVERE WEATHER THREAT FOR STORMS EARLY NEXT
WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

FAB

In the hours before

Local storm report, Jun 10, 3:45 AM CDT, 4 hours 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
345 AM CDT FRI JUN 10 2011

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

0344 AM     HEAVY RAIN       ST. MARYS               41.31N 93.73W
06/10/2011  M5.40 INCH       WARREN             IA   TRAINED SPOTTER

            RAINFALL SINCE 300 PM THURSDAY.

&&

SMALL

Local storm report, Jun 10, 4:35 AM CDT, 3 hours 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
435 AM CDT FRI JUN 10 2011

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

0432 AM     FLASH FLOOD      4 NE PELLA AIRPORT      41.45N 92.89W
06/10/2011                   MARION             IA   EMERGENCY MNGR

            THUNDER CREEK OVER 240TH STREET. ROAD CLOSED. DEPUTY
            REPORTED IT LOOKED LIKE WHITE WATER RAPIDS.

&&

SMALL

Local storm report, Jun 10, 5:26 AM CDT, 3 hours 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
526 AM CDT FRI JUN 10 2011

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

0522 AM     FLOOD            HARTFORD                41.46N 93.40W
06/10/2011                   WARREN             IA   DEPT OF HIGHWAYS

            WATER OVER HIGHWAY 5 BETWEEN COUNTY ROADS S31 AND S23.

&&

SMALL

Local storm report, Jun 10, 6:52 AM CDT, 1 hour 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
652 AM CDT FRI JUN 10 2011

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

0652 AM     HEAVY RAIN       2 NE PATTERSON          41.37N 93.85W
06/10/2011  M6.70 INCH       MADISON            IA   TRAINED SPOTTER

&&

BF

Local storm report, Jun 10, 6:54 AM CDT, 1 hour 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
654 AM CDT FRI JUN 10 2011

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

0645 AM     FLOOD            3 W OSKALOOSA           41.29N 92.70W
06/10/2011                   MAHASKA            IA   DEPT OF HIGHWAYS

            HIGHWAY 92 CLOSED DUE TO HIGH WATER BETWEEN COUNTY
            HIGHWAY T25 AND HIGHWAY 163.

&&

SMALL

Local storm report, Jun 10, 7:06 AM CDT, 1 hour 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
706 AM CDT FRI JUN 10 2011

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

0704 AM     HEAVY RAIN       2 SE PELLA AIRPORT      41.38N 92.92W
06/10/2011  M4.77 INCH       MARION             IA   CO-OP OBSERVER

            24 HOUR TOTAL

&&

BF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 7:10 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Humboldt, Kossuth, Winnebago, Wright	50 min
Jun 9, 7:41 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Hancock, Worth	37 min
Jun 9, 8:07 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Greene, Webster	41 min
Jun 9, 8:13 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Jasper, Polk, Story, Warren	47 min
Jun 9, 8:33 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin, Hancock, Wright	26 min
Jun 9, 8:37 PM CDT	Flash Flood Warning	DMX	Dallas, Madison, Polk, Warren	6 hr
Jun 9, 8:37 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene, Webster	38 min
Jun 9, 8:39 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene	21 min
Jun 9, 8:47 PM CDT	Severe Thunderstorm Warning	DMX	Story	43 min
Jun 9, 8:55 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Polk	50 min
Jun 9, 8:58 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Story	47 min
Jun 9, 9:02 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Story	28 min
Jun 9, 9:11 PM CDT	Severe Thunderstorm Warning	DMX	Polk	34 min
Jun 9, 9:15 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Hardin, Story	20 min
Jun 9, 9:26 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Polk, Story	22 min
Jun 9, 9:30 PM CDT	Flash Flood Warning	DMX	Boone, Polk, Story	4 hr
Jun 9, 10:04 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion, Polk, Warren	41 min
Jun 9, 10:29 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Taylor	31 min
Jun 9, 10:34 PM CDT	Severe Thunderstorm Warning	DMX	Polk, Warren	26 min
Jun 9, 10:45 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk	31 min
Jun 9, 10:49 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion	41 min
Jun 9, 10:56 PM CDT	Severe Thunderstorm Warning	DMX	Madison, Warren	34 min
Jun 9, 11:11 PM CDT	Flash Flood Warning	DMX	Jasper, Madison, Marion, Warren	6 hr
Jun 9, 11:14 PM CDT	High Wind Warning	DMX	Marshall, Tama	106 min
Jun 9, 11:14 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Audubon, Cass	46 min
Jun 9, 11:36 PM CDT	Flash Flood Warning	DMX	Adair, Audubon, Dallas, Guthrie, Madison	4 hr
Jun 10, 12:07 AM CDT	River Flood Warning	DMX	Polk	6 hr
Jun 10, 1:59 AM CDT	Severe Thunderstorm Warning	DMX	Adams, Ringgold, Union	46 min
Jun 10, 2:21 AM CDT	Flash Flood Warning	DMX	Mahaska, Marion, Monroe	6 hr
Jun 10, 5:05 AM CDT	Areal Flood Warning	DMX	Marion, Warren	24 hr
Jun 10, 7:20 AM CDT	River Flood Warning	DMX	Polk	20 hr
Jun 10, 7:20 AM CDT	River Flood Warning	DMX	Polk	20 hr

Nearby

Areal Flood Warnings in Iowa, 2011 Every areal flood warning in 2011

Sources

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