Alert archive / Iowa / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 13, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Apr 12, 2014, 4:29 PM CDT for Allamakee County, Fayette County, Winneshiek County, Iowa. It was in force for 46 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
- Apr 12, 2014, 4:29 PM CDT (21:29 UTC)
- Expired
- Apr 12, 2014, 5:15 PM CDT
- In force
- 46 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Allamakee County, IA, Fayette County, IA, Winneshiek County, IA
The radar
The La Crosse radar (KARX), 82 km from the middle of the area, began a volume at 21:33 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 |
|---|---|---|---|
| Apr 12, 4:48 PM CDT | HAIL 0.5 | Calmar, IA | |
| Apr 12, 4:49 PM CDT | HAIL 0.5 | Frankville, IA |
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 |
|---|---|---|---|
| Apr 12, 3:15 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 9.5 hours before the alert went out and 204 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
- 2231 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 176 m²/s²
- 0-3 km storm-relative helicity
- 360 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
747 WUUS53 KARX 122129 SVRARX IAC005-065-191-122215- /O.NEW.KARX.SV.W.0013.140412T2129Z-140412T2215Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 429 PM CDT SAT APR 12 2014 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN FAYETTE COUNTY IN NORTHEAST IOWA... SOUTHWESTERN ALLAMAKEE COUNTY IN NORTHEAST IOWA... SOUTHERN WINNESHIEK COUNTY IN NORTHEAST IOWA... * UNTIL 515 PM CDT * AT 428 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER CALMAR...OR 10 MILES SOUTH OF DECORAH...MOVING EAST AT 30 MPH. AT 420 PM CDT... THIS STORM PRODUCED NICKEL SIZE HAIL IN CALMAR. HAZARD...QUARTER SIZE HAIL. SOURCE...TRAINED WEATHER SPOTTERS. IMPACT...DAMAGE TO VEHICLES IS EXPECTED. * THIS SEVERE THUNDERSTORM WILL BE NEAR... OSSIAN AROUND 435 PM CDT. WAUKON AROUND 515 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A BUILDING. THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4320 9199 4335 9150 4319 9135 4308 9190 TIME...MOT...LOC 2128Z 247DEG 24KT 4316 9184 HAIL...1.00IN WIND...<50MPH $$ BOYNE
5 follow-up statements
091
WWUS53 KARX 122139
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
439 PM CDT SAT APR 12 2014
IAC065-122146-
/O.CAN.KARX.SV.W.0013.000000T0000Z-140412T2215Z/
FAYETTE IA-
439 PM CDT SAT APR 12 2014
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN FAYETTE COUNTY IS
CANCELLED...
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
SATURDAY NIGHT FOR SOUTHWESTERN WISCONSIN AND NORTHEAST IOWA.
LAT...LON 4323 9189 4335 9150 4319 9135 4310 9180
TIME...MOT...LOC 2136Z 247DEG 24KT 4318 9177
$$
IAC005-191-122215-
/O.CON.KARX.SV.W.0013.000000T0000Z-140412T2215Z/
ALLAMAKEE IA-WINNESHIEK IA-
439 PM CDT SAT APR 12 2014
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR SOUTHWESTERN ALLAMAKEE AND SOUTHEASTERN WINNESHIEK COUNTIES...
AT 436 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER OSSIAN...OR 8
MILES SOUTH OF DECORAH...MOVING NORTHEAST AT 30 MPH. THIS STORM
PRODUCED NICKEL SIZE HAIL AT CALMAR AT 420 PM.
HAZARD...QUARTER SIZE HAIL.
SOURCE...TRAINED WEATHER SPOTTERS.
IMPACT...DAMAGE TO VEHICLES IS EXPECTED.
THIS SEVERE STORM WILL BE NEAR...
WAUKON AROUND 515 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 4323 9189 4335 9150 4319 9135 4310 9180
TIME...MOT...LOC 2136Z 247DEG 24KT 4318 9177
HAIL...1.00IN
WIND...<50MPH
$$
BOYNE915 WWUS53 KARX 122146 SVSARX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 446 PM CDT SAT APR 12 2014 IAC005-191-122215- /O.CON.KARX.SV.W.0013.000000T0000Z-140412T2215Z/ ALLAMAKEE IA-WINNESHIEK IA- 446 PM CDT SAT APR 12 2014 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR SOUTHWESTERN ALLAMAKEE AND SOUTHEASTERN WINNESHIEK COUNTIES... AT 446 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES NORTH OF POSTVILLE...OR 8 MILES SOUTHWEST OF WAUKON...MOVING EAST AT 40 MPH. HAZARD...QUARTER SIZE HAIL. SOURCE...TRAINED WEATHER SPOTTERS. IMPACT...DAMAGE TO VEHICLES IS EXPECTED. THIS SEVERE STORM WILL BE NEAR... WAUKON AROUND 500 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4323 9189 4335 9150 4319 9135 4310 9180 TIME...MOT...LOC 2146Z 249DEG 33KT 4319 9160 HAIL...1.00IN WIND...<50MPH $$ BOYNE
250 WWUS53 KARX 122155 SVSARX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 455 PM CDT SAT APR 12 2014 IAC005-191-122215- /O.CON.KARX.SV.W.0013.000000T0000Z-140412T2215Z/ ALLAMAKEE IA-WINNESHIEK IA- 455 PM CDT SAT APR 12 2014 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR SOUTHWESTERN ALLAMAKEE AND SOUTHEASTERN WINNESHIEK COUNTIES... AT 455 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR WAUKON... MOVING NORTHEAST AT 30 MPH. HAZARD...QUARTER SIZE HAIL. SOURCE...RADAR INDICATED. IMPACT...DAMAGE TO VEHICLES IS EXPECTED. THIS SEVERE STORM WILL BE NEAR... WAUKON AROUND 505 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4317 9184 4331 9147 4319 9135 4310 9180 TIME...MOT...LOC 2155Z 247DEG 24KT 4321 9152 HAIL...1.00IN WIND...<50MPH $$ BOYNE
230 WWUS53 KARX 122204 SVSARX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 504 PM CDT SAT APR 12 2014 IAC005-191-122215- /O.CON.KARX.SV.W.0013.000000T0000Z-140412T2215Z/ ALLAMAKEE IA-WINNESHIEK IA- 504 PM CDT SAT APR 12 2014 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR SOUTHWESTERN ALLAMAKEE AND SOUTHEASTERN WINNESHIEK COUNTIES... AT 503 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER WAUKON... MOVING NORTHEAST AT 30 MPH. HAZARD...QUARTER SIZE HAIL. SOURCE...RADAR INDICATED. IMPACT...DAMAGE TO VEHICLES IS EXPECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4317 9184 4331 9147 4319 9135 4310 9180 TIME...MOT...LOC 2203Z 247DEG 24KT 4323 9144 HAIL...1.00IN WIND...<50MPH $$ BOYNE
920
WWUS53 KARX 122210
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
510 PM CDT SAT APR 12 2014
IAC005-191-122219-
/O.EXP.KARX.SV.W.0013.000000T0000Z-140412T2215Z/
ALLAMAKEE IA-WINNESHIEK IA-
510 PM CDT SAT APR 12 2014
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ALLAMAKEE AND
SOUTHEASTERN WINNESHIEK COUNTIES WILL EXPIRE AT 515 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
SATURDAY NIGHT FOR SOUTHWEST WISCONSIN AND NORTHEAST IOWA.
LAT...LON 4317 9184 4331 9147 4319 9135 4310 9180
TIME...MOT...LOC 2208Z 247DEG 24KT 4323 9144
$$
BOYNEThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 12, 3:37 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee, Winneshiek | 38 min |
| Apr 12, 3:49 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Fayette, Floyd, Howard, Winneshiek | 41 min |
| Apr 12, 4:05 PM CDT | Special Weather Statement | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 1 more | 70 min |
| Apr 12, 4:14 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee | 46 min |
| Apr 12, 4:54 PM CDT | Severe Thunderstorm Warning | ARX | Fayette | 66 min |
| Apr 12, 5:39 PM CDT | Severe Thunderstorm Warning | ARX | Clayton, Fayette | 66 min |
| Apr 12, 6:07 PM CDT | Special Weather Statement | ARX | Allamakee, Clayton, Fayette | 83 min |
| Apr 12, 6:46 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Floyd | 44 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2014Every severe thunderstorm warning in 2014
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.