Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 28, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 1, 2012, 10:45 PM CDT for Kossuth County, Palo Alto County, Iowa. It was in force for 45 min. 1 report 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 1, 2012, 10:45 PM CDT (03:45 UTC)
- Expired
- May 1, 2012, 11:30 PM CDT
- In force
- 45 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Kossuth County, IA, Palo Alto County, IA
The radar
The Des Moines radar (KDMX), 153 km from the middle of the area, began a volume at 03:48 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 1, 10:55 PM CDT | TSTM WND GST 60 | 3 Nne Whittemore, IA | TRAINED SPOTTER DRIVING ON HIGHWAY 15 BETWEEN WHITTEMORE AND FENTON ESTIMATED 60 MPH WINDS AND HAD TROUBLE CONTROLLING HIS CAR. REPORTED SEVERAL CARS IN THE DITCH AND QUARTER HAIL BEGAN FALLING AT 1058 PM. |
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 1, 9:18 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 3.8 hours before the alert went out and 205 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
- 279 J/kg
- Mixed-layer CIN
- -111 J/kg
- Mixed-layer LCL
- 1279 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 227 m²/s²
- 0-3 km storm-relative helicity
- 393 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 4.9
The text
As transmitted, in the capitals the NWS used until 2016.
464
WUUS53 KDMX 020345
SVRDMX
IAC109-147-020430-
/O.NEW.KDMX.SV.W.0028.120502T0345Z-120502T0430Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1045 PM CDT TUE MAY 1 2012
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN KOSSUTH COUNTY IN NORTH CENTRAL IOWA...
EASTERN PALO ALTO COUNTY IN NORTHWEST IOWA...
* UNTIL 1130 PM CDT
* AT 1043 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 10
MILES SOUTHEAST OF EMMETSBURG...OR 16 MILES WEST OF ALGONA...AND
MOVING EAST AT 45 MPH.
* LOCATIONS IMPACTED INCLUDE...
ALGONA...WEST BEND...WHITTEMORE...ALGONA AIRPORT...BURT...LU VERNE
AND WESLEY.
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 4323 9397 4291 9397 4291 9410 4291 9466
4316 9467
TIME...MOT...LOC 0345Z 268DEG 39KT 4301 9451
WIND...HAIL 60MPH 1.00IN
$$
DONAVON3 follow-up statements
041
WWUS53 KDMX 020402
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1102 PM CDT TUE MAY 1 2012
IAC109-147-020430-
/O.CON.KDMX.SV.W.0028.000000T0000Z-120502T0430Z/
PALO ALTO IA-KOSSUTH IA-
1102 PM CDT TUE MAY 1 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
KOSSUTH AND SOUTHEASTERN PALO ALTO COUNTIES UNTIL 1130 PM CDT...
AT 1059 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM WAS LOCATED 7
MILES WEST OF ALGONA...MOVING EAST AT 35 MPH.
LOCATIONS IMPACTED INCLUDE...
ALGONA...ALGONA AIRPORT...BURT...LU VERNE AND WESLEY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION...IMMEDIATELY GO TO THE BASEMENT OR AN INTERIOR
ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. THIS STORM HAS THE
POTENTIAL TO CAUSE SERIOUS INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.
THIS STORM HAS PRODUCED QUARTER SIZED HAIL NORTH OF WHITTEMORE AND
WINDS IN EXCESS OF 60 MPH IN THE SAME VICINITY. THERE ARE REPORTS OF
CARS BEING BLOWN INTO THE DITCH WITH THIS STORM.
&&
LAT...LON 4323 9397 4291 9397 4292 9450 4317 9454
4318 9452
TIME...MOT...LOC 0401Z 261DEG 32KT 4309 9434
WIND...HAIL 70MPH 1.00IN
$$
DONAVON045 WWUS53 KDMX 020412 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1112 PM CDT TUE MAY 1 2012 IAC147-020422- /O.CAN.KDMX.SV.W.0028.000000T0000Z-120502T0430Z/ PALO ALTO IA- 1112 PM CDT TUE MAY 1 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PALO ALTO COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 4323 9397 4291 9397 4295 9434 4319 9438 TIME...MOT...LOC 0412Z 261DEG 32KT 4305 9420 $$ IAC109-020430- /O.CON.KDMX.SV.W.0028.000000T0000Z-120502T0430Z/ KOSSUTH IA- 1112 PM CDT TUE MAY 1 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN KOSSUTH COUNTY UNTIL 1130 PM CDT... AT 1110 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM WAS LOCATED NEAR ALGONA...MOVING EAST AT 35 MPH. LOCATIONS IMPACTED INCLUDE... WESLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FOR YOUR PROTECTION...IMMEDIATELY GO TO THE BASEMENT OR AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS INJURY AND SIGNIFICANT DAMAGE TO PROPERTY. && LAT...LON 4323 9397 4291 9397 4295 9434 4319 9438 TIME...MOT...LOC 0412Z 261DEG 32KT 4305 9420 WIND...HAIL 70MPH 1.00IN $$ DONAVON
655 WWUS53 KDMX 020430 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1130 PM CDT TUE MAY 1 2012 IAC109-020440- /O.EXP.KDMX.SV.W.0028.000000T0000Z-120502T0430Z/ KOSSUTH IA- 1130 PM CDT TUE MAY 1 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN KOSSUTH COUNTY HAS EXPIRED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 2 AM. LAT...LON 4323 9397 4291 9397 4295 9434 4319 9438 TIME...MOT...LOC 0430Z 261DEG 32KT 4307 9398 $$ DONAVON
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 9:59 PM CDT | Severe Thunderstorm Warning | DMX | Emmet, Palo Alto | 46 min |
| May 1, 11:24 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt, Webster, Wright | 51 min |
| May 1, 11:35 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 25 min |
| May 2, 12:01 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Crawford, Sac | 44 min |
| May 2, 12:38 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Crawford, Greene, Sac | 52 min |
| May 2, 1:02 AM CDT | Severe Thunderstorm Warning | DMX | Audubon, Guthrie | 43 min |
| May 2, 1:07 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Carroll, Dallas, Greene, Guthrie | 38 min |
| May 2, 1:24 AM CDT | Tornado Warning | DMX | Boone | 36 min |
| May 2, 1:27 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Hamilton, Story, Webster | 48 min |
| May 2, 1:39 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Polk, Story | 51 min |
| May 2, 1:47 AM CDT | Tornado Warning | DMX | Boone, Hamilton, Hardin, Story | 28 min |
| May 2, 1:53 AM CDT | Severe Thunderstorm Warning | DMX | Dallas, Polk | 52 min |
| May 2, 2:04 AM CDT | Severe Thunderstorm Warning | DMX | Grundy, Hardin, Marshall, Story | 41 min |
| May 2, 2:37 AM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Grundy, Marshall, Tama | 36 min |
| May 2, 3:18 AM CDT | Severe Thunderstorm Warning | DMX | Jasper, Mahaska, Marion, Poweshiek | 15 min |
| May 2, 3:46 PM CDT | Flash Flood Watch | DMX | Black Hawk, Bremer, Butler, Cerro Gordo, Franklin, Grundy and 1 more | 12 hr |
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.