Alert archive / Iowa / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 2, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Mar 22, 2011, 7:26 PM CDT for Chickasaw County, Fayette County, Winneshiek County, Iowa. It was in force for 34 min. 2 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
- Mar 22, 2011, 7:26 PM CDT (00:26 UTC)
- Expired
- Mar 22, 2011, 8:00 PM CDT
- In force
- 34 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Chickasaw County, IA, Fayette County, IA, Winneshiek County, IA
The radar
The La Crosse radar (KARX), 115 km from the middle of the area, began a volume at 00:27 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 |
|---|---|---|---|
| Mar 22, 7:27 PM CDT | HAIL 0.75 | 2 Nw Lawler, IA | PUBLIC REPORTED DIME SIZE HAIL |
| Mar 22, 7:31 PM CDT | HAIL 0.88 | Waucoma, IA | EMERGENCY MANAGEMENT REPORTED NICKEL SIZE IN THE NORTHWEST CORNER OF FAYETTE COUNTY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 0.4 hours before the alert went out and 216 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.
- Mixed-layer CAPE
- 8 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 418 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 787 m²/s²
- 0-3 km storm-relative helicity
- 972 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
175 WUUS53 KARX 230026 SVRARX IAC037-065-191-230100- /O.NEW.KARX.SV.W.0002.110323T0026Z-110323T0100Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 726 PM CDT TUE MAR 22 2011 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN CHICKASAW COUNTY IN NORTHEAST IOWA... NORTHWESTERN FAYETTE COUNTY IN NORTHEAST IOWA... SOUTHWESTERN WINNESHIEK COUNTY IN NORTHEAST IOWA... * UNTIL 800 PM CDT * AT 722 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM LOCATED NEAR COUNTY ROADS B 54 AND V 56...OR 9 MILES EAST OF NEW HAMPTON...MOVING NORTHEAST AT 40 MPH. QUARTER SIZE HAIL CAN BE EXPECTED WITH THIS STORM. * THE SEVERE THUNDERSTORM WILL BE NEAR... JACKSON JUNCTION AROUND 730 PM... SPILLVILLE AROUND 735 PM... PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4322 9237 4322 9194 4291 9195 4291 9238 TIME...MOT...LOC 0025Z 214DEG 57KT 4306 9211 WIND...HAIL <50MPH 1.00IN $$ RABERDING
2 follow-up statements
929 WWUS53 KARX 230035 SVSARX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 735 PM CDT TUE MAR 22 2011 IAC037-065-191-230100- /O.CON.KARX.SV.W.0002.000000T0000Z-110323T0100Z/ WINNESHIEK IA-FAYETTE IA-CHICKASAW IA- 735 PM CDT TUE MAR 22 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN CHICKASAW...NORTHWESTERN FAYETTE AND SOUTHWESTERN WINNESHIEK COUNTIES UNTIL 800 PM CDT... AT 731 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM LOCATED NEAR JACKSON JUNCTION...OR 15 MILES EAST OF NEW HAMPTON...MOVING NORTHEAST AT 65 MPH. THIS STORM CAN PRODUCE QUARTER SIZE HAIL. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4297 9206 4322 9237 4322 9194 4296 9195 TIME...MOT...LOC 0036Z 214DEG 57KT 4320 9197 WIND...HAIL <50MPH 1.00IN $$ RABERDING
318 WWUS53 KARX 230046 SVSARX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 746 PM CDT TUE MAR 22 2011 IAC037-065-191-230056- /O.CAN.KARX.SV.W.0002.000000T0000Z-110323T0100Z/ WINNESHIEK IA-FAYETTE IA-CHICKASAW IA- 746 PM CDT TUE MAR 22 2011 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CHICKASAW... NORTHWESTERN FAYETTE AND SOUTHWESTERN WINNESHIEK COUNTIES IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF THE WARNED AREA. LAT...LON 4297 9206 4322 9237 4322 9194 4296 9195 TIME...MOT...LOC 0046Z 214DEG 57KT 4333 9185 $$
Nearby
Severe Thunderstorm Warnings in Iowa, 2011Every severe thunderstorm 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.