Alert archive / Iowa / Areal Flood Warnings in 2011

Areal Flood Warning 8, NWS Sioux Falls, SD

June 26, 20114 counties in Iowa

NWS Sioux Falls, SD issued this areal flood warning at Jun 26, 2011, 10:54 PM CDT for 4 counties in Iowa. It was in force for 36 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 26, 2011, 10:54 PM CDT (03:54 UTC)
Expired: Jun 28, 2011, 11:00 AM CDT
In force: 36 hr
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Flood severity: None

Counties Cherokee County, IA, O'Brien County, IA, Plymouth County, IA, Sioux County, IA

The radar

The Sioux Falls radar (KFSD), 100 km from the middle of the area, began a volume at 03:55 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

Omaha, NE (KOAX), launched 00:00Z, 3.9 hours before the alert went out and 181 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: 2873 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 501 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 248 m²/s²
0-3 km storm-relative helicity: 308 m²/s²
Significant tornado parameter: 6.2
Supercell composite: 26.5

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 Sioux Falls, SD wrote its last area forecast discussion before this areal flood warning went out at Jun 26, 9:55 PM CDT, 59 minutes earlier.

Area forecast discussion, Jun 26, 9:55 PM CDT, 59 minutes before

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Hazardous weather outlook, Jun 26, 12:28 PM CDT, 10 hours 26 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1228 PM CDT SUN JUN 26 2011

SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-
IAZ001>003-012>014-020>022-031-032-NEZ013-014-271200-
AURORA-BEADLE-BON HOMME-BROOKINGS-BRULE-BUENA VISTA IA-
CHARLES MIX-CHEROKEE IA-CLAY-CLAY IA-COTTONWOOD MN-DAKOTA NE-
DAVISON-DICKINSON IA-DIXON NE-DOUGLAS-GREGORY-HANSON-HUTCHINSON-
IDA IA-JACKSON MN-JERAULD-KINGSBURY-LAKE-LINCOLN-LINCOLN MN-
LYON IA-LYON MN-MCCOOK-MINER-MINNEHAHA-MOODY-MURRAY MN-NOBLES MN-
OBRIEN IA-OSCEOLA IA-PIPESTONE MN-PLYMOUTH IA-ROCK MN-SANBORN-
SIOUX IA-TURNER-UNION-WOODBURY IA-YANKTON-
1228 PM CDT SUN JUN 26 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA...
SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS...
STORMS WILL BECOME LIKELY LATER THIS AFTERNOON AND TONIGHT AS A
COLD FRONT MOVES EAST ACROSS THE REGION. SOME OF THESE STORMS MAY
BECOME SEVERE WITH LARGE HAIL THE SIZE OF GOLF BALLS AND DAMAGING
WINDS OF 60 TO 70 MPH. THERE MAY ALSO BE A FEW TORNADOES LATE
THIS AFTERNOON AND EVENING SOUTH OF INTERSTATE 90 AND ALONG AND
WEST OF INTERSTATE 29. IN ADDITION TO THE SEVERE THREAT...LOCALLY
HEAVY RAIN OF 1 TO 2 INCHES WILL OCCUR WITH SOME OF THE STORMS
WHICH COULD CAUSE LOCALIZED FLOODING...AS WELL AGGRAVATE EXISTING
FLOODING SITUATIONS.

FLOODING...
RECENT AND EXPECTED RAINFALL ACROSS THE REGION WILL CONTINUE TO
CAUSE AREA RIVERS AND STREAMS TO REMAIN ABOVE FLOOD STAGE IN MANY
LOCATIONS. RIVERS AND STREAMS IN THE WARNED AREAS ARE EXPECTED
REMAIN ABOVE FLOOD STAGE OVER THE NEXT SEVERAL DAYS.

RECORD HIGH RELEASES ALONG THE MISSOURI RIVER WILL CONTINUE INTO
MID SUMMER. HIGH WATER LEVELS WILL CAUSE SIGNIFICANT IMPACTS
BETWEEN CHAMBERLAIN AND SIOUX CITY.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE POSSIBLE BY EARLY AFTERNOON WEST OF
THE JAMES RIVER AND LATER THIS AFTERNOON AND EVENING EAST OF
THE JAMES.

&&

FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT
WWW.WEATHER.GOV/SIOUXFALLS. THIS INCLUDES THE GRAPHICAL HAZARDOUS
WEATHER OUTLOOK.

In the hours before

Local storm report, Jun 26, 10:15 PM CDT, 39 minutes before

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Local storm report, Jun 26, 10:24 PM CDT, 30 minutes before

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Local storm report, Jun 26, 10:25 PM CDT, 29 minutes before

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Local storm report, Jun 26, 10:29 PM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1029 PM CDT SUN JUN 26 2011

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

1015 AM     FLASH FLOOD      REMSEN                  42.81N 95.97W
06/26/2011                   PLYMOUTH           IA   EMERGENCY MNGR

            CONSIDERABLE AMOUNT OF FLOODING TAKING PLACE IN TOWN.

1024 AM     HEAVY RAIN       LE MARS                 42.79N 96.17W
06/26/2011  M0.00 INCH       PLYMOUTH           IA   EMERGENCY MNGR

            3.05 INCHES OF RAIN.

&&

HEITKAMP

Local storm report, Jun 26, 10:35 PM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1035 PM CDT SUN JUN 26 2011

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

0703 PM     TSTM WND DMG     3 NNE WAYNE             42.28N 97.00W
06/26/2011                   DIXON              NE   PUBLIC

            TREE DAMAGE INCLUDING LARGE BRANCHES BLOWN DOWN.

0723 PM     TSTM WND DMG     5 E WAKEFIELD           42.27N 96.77W
06/26/2011                   DIXON              NE   TRAINED SPOTTER

            NUMEROUS 4 TO 6 INCH DIAMETER BRANCHES DOWNED.

0730 PM     TSTM WND GST     2 N SALIX               42.34N 96.29W
06/26/2011  E70.00 MPH       WOODBURY           IA   TRAINED SPOTTER

0730 PM     FLASH FLOOD      6 N VERMILLION          42.87N 96.90W
06/26/2011                   CLAY               SD   TRAINED SPOTTER

            WATER RUNNING OVER UNIVERSITY ROAD

0740 PM     TSTM WND DMG     LAWTON                  42.48N 96.18W
06/26/2011                   WOODBURY           IA   TRAINED SPOTTER

            ONE INCH DIAMETER BRANCHES DOWNED IN TOWN.

0740 PM     TSTM WND DMG     BRONSON                 42.41N 96.21W
06/26/2011                   WOODBURY           IA   TRAINED SPOTTER

            NUMEROUS FOUR TO EIGHT DIAMETER BRANCHES DOWNED.

0746 PM     TSTM WND GST     2 N SALIX               42.34N 96.29W
06/26/2011  E75.00 MPH       WOODBURY           IA   TRAINED SPOTTER

0746 PM     TSTM WND DMG     SLOAN                   42.23N 96.22W
06/26/2011                   WOODBURY           IA   EMERGENCY MNGR

            AT LEAST SIX HOMES WITH ROOF DAMAGE WITH SHINGLES BLOWN
            OFF. POWER LINES DOWNED. GRAIN BIN DESTROYED IN THE
            OUTSKIRTS OF TOWN.

0753 PM     TSTM WND GST     4 SSE SIOUX CITY        42.45N 96.36W
06/26/2011  M71.00 MPH       WOODBURY           IA   TRAINED SPOTTER

0759 PM     TSTM WND DMG     HORNICK                 42.23N 96.10W
06/26/2011                   WOODBURY           IA   TRAINED SPOTTER

            TREE DAMAGE AND POWER LINE DAMAGE FROM TREE DEBRIS
            FALLING ON POWER LINES. POWER OUT. DAMAGING WINDS
            CONTINUED FOR 20 MINUTES TO AT LEAST 819 PM CDT.

0805 PM     TSTM WND GST     SIOUX CITY              42.50N 96.39W
06/26/2011  E0.00 MPH        WOODBURY           IA   EMERGENCY MNGR

            60 MPH WINDS IN SIOUX CITY ALONG WITH CONSIDERABLE STREET
            FLOODING IN THE DOWNTOWN AREA.

0810 PM     FLASH FLOOD      BRUNSVILLE              42.81N 96.27W
06/26/2011                   PLYMOUTH           IA   CO-OP OBSERVER

            MINK CREEK OUT OF ITS BANKS.

0830 PM     FLASH FLOOD      LE MARS                 42.79N 96.17W
06/26/2011                   PLYMOUTH           IA   EMERGENCY MNGR

            QUITE A BIT OF STREET FLOODING IN TOWN.

0830 PM     FLASH FLOOD      BRUNSVILLE              42.81N 96.27W
06/26/2011                   PLYMOUTH           IA   CO-OP OBSERVER

            WATER SURROUNDED TWO HOMES IN BRUNSVILLE NEAR GOLF
            COURSE.

0843 PM     NON-TSTM WND GST SIOUX FALLS             43.54N 96.73W
06/26/2011  M0.00 MPH        MINNEHAHA          SD   ASOS

            63 MPH WIND GUST AT JOE FOSS FIELD.

0853 PM     NON-TSTM WND GST 1 NNW NORTH SIOUX CITY  42.55N 96.51W
06/26/2011  E65.00 MPH       UNION              SD   OTHER FEDERAL

0859 PM     NON-TSTM WND GST SIOUX CITY              42.50N 96.39W
06/26/2011  M0.00 MPH        WOODBURY           IA   ASOS

            63 MPH WIND GUST AT SIOUX GATEWAY AIRPORT

0900 PM     TSTM WND GST     BATTLE CREEK            42.32N 95.60W
06/26/2011  E0.00 MPH        IDA                IA   TRAINED SPOTTER

            60 TO 65 MPH WIND GUSTS CAUSING LARGE TREE BRANCHES TO BE
            DOWNED.

0915 PM     FLASH FLOOD      MARCUS                  42.82N 95.81W
06/26/2011                   CHEROKEE           IA   EMERGENCY MNGR

            WATER OVER MANY GRAVEL ROADS AROUND MARCUS.

0915 PM     HEAVY RAIN       SIOUX CITY              42.50N 96.39W
06/26/2011  E0.00 INCH       WOODBURY           IA   TRAINED SPOTTER

            2.91 INCHES OF RAIN IN AN HOUR.

0937 PM     FLASH FLOOD      MARCUS                  42.82N 95.81W
06/26/2011                   CHEROKEE           IA   BROADCAST MEDIA

            CULVERT WASHED OUT ALONG IOWA HIGHWAY 3 BETWEEN MARCUS
            AND REMSEN.

0937 PM     HEAVY RAIN       4 S PAULLINA            42.92N 95.69W
06/26/2011  E0.00 INCH       O'BRIEN            IA   BROADCAST MEDIA

            4.5 INCHES OF RAIN IN AN HOUR

1010 PM     FLASH FLOOD      MARCUS                  42.82N 95.81W
06/26/2011                   CHEROKEE           IA   EMERGENCY MNGR

            SIX INCHES OF WATER OVER MANY AREA COUNTY ROADS.

1010 PM     FLASH FLOOD      2 S MARCUS              42.80N 95.81W
06/26/2011                   CHEROKEE           IA   EMERGENCY MNGR

            PICK UP WASHED OFF ROAD DUE TO FLOODING ALONG C AVENUE
            SOUTH OF MARCUS. NO INJUERIES WERE REPORTED.

1015 PM     FLASH FLOOD      REMSEN                  42.81N 95.97W
06/26/2011                   PLYMOUTH           IA   EMERGENCY MNGR

            CONSIDERABLE AMOUNT OF FLOODING TAKING PLACE IN TOWN.

1024 PM     HEAVY RAIN       LE MARS                 42.79N 96.17W
06/26/2011  M0.00 INCH       PLYMOUTH           IA   EMERGENCY MNGR

            3.05 INCHES OF RAIN.

&&

HEITKAMP

Local storm report, Jun 26, 10:38 PM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1038 PM CDT SUN JUN 26 2011

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

0910 PM     TSTM WND DMG     STORM LAKE              42.65N 95.20W
06/26/2011                   BUENA VISTA        IA   LAW ENFORCEMENT

            TREES AND POWER LINES DOWN

&&

JSHEEHAN

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 26, 7:27 PM CDT	Flash Flood Warning	FSD	Union	3 hr
Jun 26, 8:58 PM CDT	High Wind Warning	FSD	Clay, Lincoln, Minnehaha, Moody, Turner, Union	4 hr
Jun 26, 7:29 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	31 min
Jun 26, 7:37 PM CDT	Severe Thunderstorm Warning	FSD	Ida, Woodbury	38 min
Jun 26, 7:56 PM CDT	Flash Flood Warning	FSD	Cherokee, O'Brien, Plymouth, Sioux	3 hr
Jun 26, 7:59 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	31 min
Jun 26, 8:14 PM CDT	Severe Thunderstorm Warning	FSD	Ida, Woodbury	31 min
Jun 26, 8:17 PM CDT	Flash Flood Warning	FSD	Plymouth	3 hr
Jun 26, 8:21 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Woodbury	24 min
Jun 26, 8:32 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee	28 min
Jun 26, 8:41 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Woodbury	34 min
Jun 26, 8:44 PM CDT	Severe Thunderstorm Warning	FSD	Ida, Woodbury	31 min
Jun 26, 8:52 PM CDT	Flash Flood Warning	FSD	Cherokee	2 hr
Jun 26, 8:56 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista	34 min
Jun 26, 8:59 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee	31 min
Jun 26, 9:02 PM CDT	Flash Flood Warning	FSD	Buena Vista, Clay	3 hr
Jun 26, 9:29 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista	31 min
Jun 27, 3:16 PM CDT	River Flood Warning	FSD	Woodbury	42 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.