Alert archive / Iowa / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 341, NWS Des Moines, IA

September 15, 2010Kossuth County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Sep 15, 2010, 5:38 PM CDT for Kossuth County, Iowa. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 15, 2010, 5:38 PM CDT (22:38 UTC)
Expired
Sep 15, 2010, 6:05 PM CDT
In force
27 min
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Kossuth County, IA

The radar

The Des Moines radar (KDMX), 169 km from the middle of the area, began a volume at 22:37 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Sep 15, 2:19 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.6 hours before the alert went out and 189 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-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2010-09-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2010-09-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 210 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
732 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
210 m²/s²
0-3 km storm-relative helicity
302 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 severe thunderstorm 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 severe thunderstorm warning went out at Sep 15, 12:45 PM CDT, 4 hours 53 minutes earlier.

Area forecast discussion, Sep 15, 12:45 PM CDT, 4 hours 53 minutes before
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Hazardous weather outlook, Sep 15, 3:37 PM CDT, 2 hours 1 minute before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
337 PM CDT WED SEP 15 2010

IAZ025>028-033>039-044>050-057>062-070>075-081>086-092>097-162045-
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-
337 PM CDT WED SEP 15 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR A PORTION OF CENTRAL IOWA
MAINLY SOUTH OF HIGHWAY 20.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS WILL DEVELOP OVER THE AREA THIS AFTERNOON
AND PERSIST THROUGH THE EVENING HOURS. NICKEL HAIL...STRONG WIND
GUSTS AND HEAVY RAINFALL ARE LIKELY WITH THESE STORMS. AN ISOLATED
SEVERE STORM IS POSSIBLE WITH LARGE HAIL AND DAMAGING WIND THE
MAIN THREAT. FLASH FLOODING IS NOT ANTICIPATED BUT LOCATIONS SOUTH
OF INTERSTATE 80 AND EAST OF INTERSTATE 35 WILL NEED TO BE
MONITORED IF HEAVY RAINFALL OCCURS FOR A LONG DURATION OF TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

ADDITIONAL THUNDERSTORMS ARE IN THE FORECAST FOR THE WEEKEND AND
AGAIN LATE MONDAY INTO TUESDAY. MODERATE TO LOCALLY HEAVY RAIN ARE
POSSIBLE...WITH THE POTENTIAL FOR SOME FLOODING. THE SEVERE
WEATHER POTENTIAL WILL BE BETTER DEFINED IN THE COMING DAYS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING AND RAINFALL REPORTS WOULD
BE APPRECIATED.

IAZ004>007-015>017-023-024-162045-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-
337 PM CDT WED SEP 15 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR A PORTION OF CENTRAL IOWA
MAINLY NORTH OF HIGHWAY 20.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED THROUGH THE EVENING. SOME
STORMS MAY BECOME SEVERE MID EVENING. LARGE HAIL AND DAMAGING
WIND ARE THE MAIN THREATS BUT AN ISOLATED TORNADO CANNOT BE RULED
OUT...ESPECIALLY THROUGH EARLY EVENING. LOCALLY HEAVY RAINFALL IS
POSSIBLE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

ADDITIONAL THUNDERSTORMS ARE IN THE FORECAST FOR THE WEEKEND AND
AGAIN LATE MONDAY INTO TUESDAY. MODERATE TO LOCALLY HEAVY RAIN ARE
POSSIBLE...WITH THE POTENTIAL FOR SOME FLOODING. THE SEVERE
WEATHER POTENTIAL WILL BE BETTER DEFINED IN THE COMING DAYS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED MID EVENING. RAINFALL REPORTS
WOULD ALSO BE APPRECIATED.

FAB

In the hours before

Special weather statement, Sep 15, 5:26 PM CDT, 12 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
526 PM CDT WED SEP 15 2010

IAZ005-015-024-152300-
HUMBOLDT-KOSSUTH-PALO ALTO-
526 PM CDT WED SEP 15 2010

...STRONG THUNDERSTORMS OVER NORTHERN IOWA...

AT 524 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER EXTREME SOUTHWESTERN KOSSUTH COUNTY...MOVING
EAST AT 30 MPH.

UP TO NICKEL SIZED HAIL IS ARE POSSIBLE WITH THIS STORM.

* THE THUNDERSTORM WILL BE NEAR...
  BODE BY 535 PM CDT...
  ALGONA AIRPORT BY 550 PM CDT...
  ALGONA BY 555 PM CDT...

SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.

WILKINS

Nearby

Severe Thunderstorm Warnings in Iowa, 2010Every severe thunderstorm warning in 2010

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.