Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 46, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 3, 2012, 4:18 PM CDT for 4 counties in Iowa. It was in force for 42 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 3, 2012, 4:18 PM CDT (21:18 UTC)
- Expired
- May 3, 2012, 5:00 PM CDT
- In force
- 42 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Cerro Gordo County, IA, Hancock County, IA, Winnebago County, IA, Worth County, IA
The radar
The Minneapolis radar (KMPX), 173 km from the middle of the area, began a volume at 21:21 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 3, 4:20 PM CDT | HAIL 0.88 | 2 Nw Forest City Airpor, IA | MAINLY PEA SIZE HAIL WITH BIGGER HAIL UP TO NICKEL SIZE MIXED IN. LASTED FOR ABOUT 7 MINTUES AND STARTED TO COVER THE GROUND. |
| May 3, 4:23 PM CDT | HAIL 1 | 1 Ene Forest City, IA | |
| May 3, 4:24 PM CDT | HAIL 1 | 1 N Forest City, IA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 9.3 hours before the alert went out and 174 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
- 1755 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 521 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
827 WUUS53 KDMX 032118 SVRDMX IAC033-081-189-195-032200- /O.NEW.KDMX.SV.W.0046.120503T2118Z-120503T2200Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 418 PM CDT THU MAY 3 2012 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN CERRO GORDO COUNTY IN NORTH CENTRAL IOWA... NORTHEASTERN HANCOCK COUNTY IN NORTH CENTRAL IOWA... SOUTHEASTERN WINNEBAGO COUNTY IN NORTH CENTRAL IOWA... SOUTHWESTERN WORTH COUNTY IN NORTH CENTRAL IOWA... * UNTIL 500 PM CDT * AT 417 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR FOREST CITY...OR 23 MILES WEST OF MASON CITY...AND MOVING EAST AT 25 MPH. * LOCATIONS IMPACTED INCLUDE... FERTILE. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOVE TO AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS. IF YOU ARE IN A MOBILE HOME...GET OUT NOW...AND SEEK SHELTER IN A REINFORCED BUILDING. && LAT...LON 4336 9339 4319 9338 4321 9371 4333 9371 TIME...MOT...LOC 2118Z 273DEG 21KT 4326 9363 WIND...HAIL <50MPH 1.00IN $$ COGIL
2 follow-up statements
283 WWUS53 KDMX 032132 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 432 PM CDT THU MAY 3 2012 IAC033-081-189-195-032200- /O.CON.KDMX.SV.W.0046.000000T0000Z-120503T2200Z/ HANCOCK IA-CERRO GORDO IA-WORTH IA-WINNEBAGO IA- 432 PM CDT THU MAY 3 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN WINNEBAGO...SOUTHWESTERN WORTH...NORTHWESTERN CERRO GORDO AND NORTHEASTERN HANCOCK COUNTIES UNTIL 500 PM CDT... AT 431 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED 6 MILES EAST OF FOREST CITY...OR 18 MILES WEST OF MASON CITY...MOVING EAST AT 25 MPH. LOCATIONS IMPACTED INCLUDE... FERTILE. PRECAUTIONARY/PREPAREDNESS ACTIONS... PREPARE FOR LARGE HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A REINFORCED BUILDING AND AWAY FROM WINDOWS. && LAT...LON 4334 9359 4334 9339 4319 9338 4320 9361 TIME...MOT...LOC 2133Z 279DEG 22KT 4325 9351 WIND...HAIL <50MPH 1.00IN $$ COGIL
780 WWUS53 KDMX 032158 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 458 PM CDT THU MAY 3 2012 IAC033-081-189-195-032208- /O.EXP.KDMX.SV.W.0046.000000T0000Z-120503T2200Z/ HANCOCK IA-CERRO GORDO IA-WORTH IA-WINNEBAGO IA- 458 PM CDT THU MAY 3 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WINNEBAGO... SOUTHWESTERN WORTH...NORTHWESTERN CERRO GORDO AND NORTHEASTERN HANCOCK COUNTIES WILL EXPIRE AT 500 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 4334 9359 4334 9339 4319 9338 4320 9361 TIME...MOT...LOC 2158Z 279DEG 22KT 4323 9330 $$
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 5:11 AM CDT | Severe Thunderstorm Warning | DMX | Butler, Cerro Gordo, Franklin | 47 min |
| May 3, 2:24 PM CDT | Severe Thunderstorm Warning | DMX | Kossuth | 21 min |
| May 3, 2:48 PM CDT | Severe Thunderstorm Warning | DMX | Kossuth | 42 min |
| May 3, 3:31 PM CDT | Severe Thunderstorm Warning | DMX | Hancock, Kossuth, Winnebago | 44 min |
| May 3, 3:48 PM CDT | Flash Flood Warning | DMX | Kossuth | 4 hr |
| May 3, 4:03 PM CDT | Severe Thunderstorm Warning | DMX | Emmet, Kossuth | 42 min |
| May 3, 4:52 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 53 min |
| May 3, 5:06 PM CDT | Severe Thunderstorm Warning | DMX | Kossuth | 39 min |
| May 3, 6:13 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt | 47 min |
| May 3, 6:57 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt | 48 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.