Alert archive / Iowa / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 190, NWS Des Moines, IA

June 21, 20104 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 21, 2010, 11:04 PM CDT for 4 counties in Iowa. It was in force for 45 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
Jun 21, 2010, 11:04 PM CDT (04:04 UTC)
Expired
Jun 21, 2010, 11:49 PM CDT
In force
45 min
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Appanoose County, IA, Davis County, IA, Monroe County, IA, Wapello County, IA

The radar

The Des Moines radar (KDMX), 130 km from the middle of the area, began a volume at 04:07 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 00:00Z, 4.1 hours before the alert went out and 196 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, Davenport, at 00:00Z on 2010-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2621 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2010-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 square meters per square second.1939587897Sfc1 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
2621 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
930 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
154 m²/s²
Significant tornado parameter
1.5
Supercell composite
7.6

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 Jun 21, 9:43 PM CDT, 1 hour 21 minutes earlier.

Area forecast discussion, Jun 21, 9:43 PM CDT, 1 hour 21 minutes before
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Hazardous weather outlook, Jun 21, 3:31 PM CDT, 7 hours 33 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
331 PM CDT MON JUN 21 2010

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086-
092>097-222045-
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-
331 PM CDT MON JUN 21 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS A SLIGHT CHANCE FOR SEVERE WEATHER LATE THIS AFTERNOON
AND OVERNIGHT TONIGHT. A FEW SUPER CELL THUNDERSTORMS ARE POSSIBLE
SOUTH OF INTERSTATE 80 BETWEEN 5 AND 10 PM THIS EVENING AND WOULD
BRING THE POTENTIAL FOR GOLF BALL SIZED HAIL...70 MPH WINDS AND
ISOLATED TORNADOES. ADDITIONAL SCATTERED STORMS ARE POSSIBLE OVER
THE REMAINDER OF THE AREA AFTER 10 PM WITH QUARTER SIZED HAIL AND
60 MPH WINDS POSSIBLE. LOCALIZED HEAVY RAINFALL MAY OCCUR.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

ADDITIONAL SEVERE STORMS ALONG WITH HEAVY RAINFALL ARE POSSIBLE
TUESDAY INTO WEDNESDAY. A SLIGHT CHANCE OF THUNDERSTORMS WILL
RETURN THURSDAY NIGHT AND CONTINUE FOR ALL OR PART OF THE AREA
THROUGH SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED BETWEEN 5 PM AND 10 PM THIS
EVENING SOUTH OF INTERSTATE 80.

DONAVON

In the hours before

Special weather statement, Jun 21, 6:07 PM CDT, 4 hours 57 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
607 PM CDT MON JUN 21 2010

IAZ084>086-094>097-220100-
LUCAS-MONROE-WAPELLO-DECATUR-WAYNE-APPANOOSE-DAVIS-
INCLUDING THE CITIES OF...CHARITON...ALBIA...OTTUMWA...LEON...
CORYDON...CENTERVILLE...BLOOMFIELD
607 PM CDT MON JUN 21 2010

...STRONG TO SEVERE THUNDERSTORMS EXPECTED EARLY THIS EVENING...

SCATTERED THUNDERSTORMS CONTINUE TO DEVELOP OVER SOUTHERN IOWA
NEAR LEON AND CORYDON. THESE STORMS WILL CONTINUE ADVANCING EAST NORTHEAST
TOWARD CENTERVILLE...BLOOMFIELD AND OTTUMWA BETWEEN 600 PM AND 800 PM.

THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING LARGE
HAIL...DAMAGING WINDS...LOCALLY HEAVY RAIN...AND ISOLATED
TORNADOES.  A TORNADO WATCH REMAINS IN EFFECT UNTIL 10 PM.

SMALL
Special weather statement, Jun 21, 7:59 PM CDT, 3 hours 5 minutes before
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Special weather statement, Jun 21, 10:25 PM CDT, 39 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1025 PM CDT MON JUN 21 2010

IAZ097-220400-
DAVIS-
1025 PM CDT MON JUN 21 2010

AT 1020 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER EXTREME SOUTH CENTRAL DAVIS COUNTY...MOVING
EAST AT 30 MPH.

PENNY SIZE HAIL...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS
STORM.

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

BEITLICH
Special weather statement, Jun 21, 10:32 PM CDT, 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1032 PM CDT MON JUN 21 2010

IAZ085-096-220400-
APPANOOSE-MONROE-
1032 PM CDT MON JUN 21 2010

AT 1029 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER NORTH CENTRAL APPANOOSE COUNTY...MOVING EAST
AT 20 MPH.

NICKEL SIZE HAIL...WINDS UP TO 50 MPH...FREQUENT CLOUD TO GROUND
LIGHTNING...BRIEF MODERATE DOWNPOURS...ARE POSSIBLE WITH THIS STORM.

* THE THUNDERSTORM WILL BE NEAR...
  MORAVIA BY 1050 PM CDT...
  UNIONVILLE BY 1100 PM CDT...

GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE
OBJECTS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS
TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS
PASSED.

PODRAZIK
Special weather statement, Jun 21, 11:00 PM CDT, 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1100 PM CDT MON JUN 21 2010

IAZ096-097-220500-
APPANOOSE-DAVIS-
INCLUDING THE CITIES OF...CENTERVILLE...BLOOMFIELD
1100 PM CDT MON JUN 21 2010

...STRONG THUNDERSTORMS CONTINUE THIS EVENING...

SCATTERED THUNDERSTORMS CONTINUE TO AFFECT PORTIONS OF SOUTHEAST
IOWA LATE THIS EVENING. SOME OF THESE STORMS MAY BE STRONG
PRODUCING UP TO NICKEL SIZED HAIL AND LOCALLY HEAVY RAINS. THE
STORMS WILL PRIMARILY AFFECT EASTERN APPANOOSE AND DAVIS COUNTIES
THROUGH 100 AM.

SMALL

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 7:25 PM CDTSevere Thunderstorm WarningDMXDavis32 min
Jun 21, 9:29 PM CDTSevere Thunderstorm WarningDMXDavis31 min
Jun 22, 4:32 AM CDTSevere Thunderstorm WarningDMXClarke, Decatur, Madison, Ringgold, Union43 min
Jun 22, 4:59 AM CDTSevere Thunderstorm WarningDMXClarke, Lucas, Madison, Marion, Warren46 min
Jun 22, 5:42 AM CDTSevere Thunderstorm WarningDMXJasper, Mahaska, Marion, Polk, Warren48 min
Jun 22, 6:02 AM CDTSevere Thunderstorm WarningDMXMahaska, Monroe, Wapello43 min
Jun 22, 6:15 AM CDTSevere Thunderstorm WarningDMXMahaska, Poweshiek30 min
Jun 22, 6:36 AM CDTSevere Thunderstorm WarningDMXDavis39 min
Jun 22, 8:26 AM CDTRiver Flood WarningDMXMadison, Warren43 hr
Jun 22, 8:27 AM CDTFlash Flood WarningDMXWapello4 hr
Jun 22, 2:40 PM CDTRiver Flood WarningDMXMahaska, Marion6 hr
Jun 22, 3:40 PM CDTFlash Flood WatchDMXAdair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more20 hr

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.