Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 38, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at May 24, 2012, 4:53 PM CDT for 4 counties in Iowa. It was in force for 37 min. 3 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
- May 24, 2012, 4:53 PM CDT (21:53 UTC)
- Expired
- May 24, 2012, 5:30 PM CDT
- In force
- 37 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Allamakee County, IA, Clayton County, IA, Fayette County, IA, Winneshiek County, IA
The radar
The La Crosse radar (KARX), 78 km from the middle of the area, began a volume at 21:56 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 |
|---|---|---|---|
| May 24, 4:54 PM CDT | TSTM WND DMG | 2 Nnw Hawkeye, IA | MULTIPLE TREES DOWN ALONG HWY 18 AND A UTILITY POLE SNAPPED ALONG W14 NORTH OF TOWN. |
| May 24, 4:58 PM CDT | TSTM WND GST 65 | Hawkeye, IA | WIND DAMAGE TO POWER LINES...BUILDINGS AND TREES FROM HAWKEYE AREA TO WEST UNION AND ST LUCAS |
| May 24, 5:18 PM CDT | TSTM WND DMG | Frankville, IA | A NUMBER OF TREES DOWN IN FRANKVILLE |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 24, 3:30 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 9.9 hours before the alert went out and 197 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1568 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
183 WUUS53 KARX 242153 SVRARX IAC005-043-065-191-242230- /O.NEW.KARX.SV.W.0038.120524T2153Z-120524T2230Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 453 PM CDT THU MAY 24 2012 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... ALLAMAKEE COUNTY IN NORTHEAST IOWA... NORTHWESTERN CLAYTON COUNTY IN NORTHEAST IOWA... NORTHERN FAYETTE COUNTY IN NORTHEAST IOWA... SOUTHEASTERN WINNESHIEK COUNTY IN NORTHEAST IOWA... * UNTIL 530 PM CDT * AT 451 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM LOCATED NEAR DOUGLAS...OR NEAR WEST UNION... MOVING NORTHEAST AT 65 MPH. THIS STORM CAN PRODUCE QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... OSSIAN AND CLERMONT AROUND 500 PM... POSTVILLE AND CASTALIA AROUND 505 PM... FRANKVILLE AROUND 510 PM... WAUKON AROUND 515 PM... PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM THURSDAY EVENING FOR SOUTHEAST MINNESOTA AND WESTERN WISCONSIN. && LAT...LON 4348 9143 4320 9115 4277 9203 4302 9204 TIME...MOT...LOC 2153Z 228DEG 58KT 4300 9185 WIND...HAIL 60MPH 1.00IN $$ 04
3 follow-up statements
565 WWUS53 KARX 242203 SVSARX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 503 PM CDT THU MAY 24 2012 IAC005-043-065-191-242230- /O.CON.KARX.SV.W.0038.000000T0000Z-120524T2230Z/ FAYETTE IA-ALLAMAKEE IA-CLAYTON IA-WINNESHIEK IA- 503 PM CDT THU MAY 24 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN WINNESHIEK...NORTHWESTERN CLAYTON...ALLAMAKEE AND NORTHERN FAYETTE COUNTIES UNTIL 530 PM CDT... TRAINED WEATHER SPOTTERS REPORTED STOP SIGNS BLOWN OVER NEAR HAWKEYE WITH A SEVERE THUNDERSTORM. AT 500 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE SEVERE THUNDERSTORM WAS LOCATED NEAR COUNTY ROADS W 42 AND B 40...OR 7 MILES NORTH OF WEST UNION...MOVING NORTHEAST AT 60 MPH. THIS STORM CAN PRODUCE QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... POSTVILLE AND FRANKVILLE AROUND 510 PM... LUDLOW AROUND 515 PM... WAUKON AROUND 520 PM... ELON AROUND 525 PM... PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM THURSDAY EVENING FOR NORTHEAST IOWA AND SOUTHWEST WISCONSIN. && LAT...LON 4309 9195 4348 9143 4320 9115 4277 9203 TIME...MOT...LOC 2203Z 226DEG 53KT 4309 9173 WIND...HAIL 60MPH 1.00IN $$ 04
312 WWUS53 KARX 242216 SVSARX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 516 PM CDT THU MAY 24 2012 IAC005-043-065-191-242230- /O.CON.KARX.SV.W.0038.000000T0000Z-120524T2230Z/ FAYETTE IA-ALLAMAKEE IA-CLAYTON IA-WINNESHIEK IA- 516 PM CDT THU MAY 24 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN WINNESHIEK...NORTHWESTERN CLAYTON...ALLAMAKEE AND NORTHEASTERN FAYETTE COUNTIES UNTIL 530 PM CDT... AT 514 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM LOCATED NEAR LUDLOW...OR 7 MILES SOUTHWEST OF WAUKON...MOVING NORTHEAST AT 60 MPH. THIS STORM CAN PRODUCE QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... MAUD AROUND 520 PM... CHURCHTOWN AROUND 525 PM... THOMPSON CORNER AROUND 530 PM... PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM THURSDAY EVENING FOR NORTHEAST IOWA AND SOUTHWEST WISCONSIN. && LAT...LON 4283 9192 4318 9183 4348 9143 4320 9115 TIME...MOT...LOC 2216Z 226DEG 53KT 4322 9154 WIND...HAIL 60MPH 1.00IN $$ 04
576 WWUS53 KARX 242224 SVSARX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 524 PM CDT THU MAY 24 2012 IAC005-043-065-191-242234- /O.EXP.KARX.SV.W.0038.000000T0000Z-120524T2230Z/ FAYETTE IA-ALLAMAKEE IA-CLAYTON IA-WINNESHIEK IA- 524 PM CDT THU MAY 24 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WINNESHIEK... NORTHWESTERN CLAYTON...ALLAMAKEE AND NORTHEASTERN FAYETTE COUNTIES WILL EXPIRE AT 530 PM CDT... AT 523 PM CDT SPOTTERS REPORTED PEA SIZED HAIL IN FRANKVILLE. THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS. HOWEVER...THE STORM REMAINS STRONG AND COULD PRODUCE SMALL HAIL AND GUSTY WINDS...IN ADDITION TO LIGHTNING AND HEAVY RAIN. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT THURSDAY EVENING FOR NORTHEAST IOWA AND SOUTHWEST WISCONSIN. LAT...LON 4283 9192 4318 9183 4348 9143 4320 9115 TIME...MOT...LOC 2224Z 226DEG 53KT 4330 9142 $$ 04
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 3:11 AM CDT | Wind Advisory | ARX | Allamakee, Clayton, Fayette, Winneshiek | 16 hr |
| May 24, 3:13 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 32 min |
| May 24, 4:27 PM CDT | Severe Thunderstorm Warning | ARX | Winneshiek | 33 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2012Every severe thunderstorm warning in 2012
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.