Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 70, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 5, 2012, 2:28 PM CDT for Winnebago County, Iowa. It was in force for 32 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 5, 2012, 2:28 PM CDT (19:28 UTC)
- Expired
- May 5, 2012, 3:00 PM CDT
- In force
- 32 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Winnebago County, IA
The radar
The Minneapolis radar (KMPX), 160 km from the middle of the area, began a volume at 19:32 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 5, 2:39 PM CDT | HAIL 1 | 4 Ne Thompson, 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 |
|---|---|---|---|
| May 5, 11:38 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 7.5 hours before the alert went out and 160 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
- 480 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 174 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
618
WUUS53 KDMX 051928
SVRDMX
IAC189-052000-
/O.NEW.KDMX.SV.W.0070.120505T1928Z-120505T2000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
228 PM CDT SAT MAY 5 2012
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WINNEBAGO COUNTY IN NORTH CENTRAL IOWA...
* UNTIL 300 PM CDT
* AT 224 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 NEAR
BUFFALO CENTER...OR 30 MILES NORTHEAST OF ALGONA...AND MOVING EAST
AT 40 MPH.
* LOCATIONS IMPACTED INCLUDE...
LAKE MILLS...THOMPSON...LELAND AND SCARVILLE.
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 4343 9349 4325 9350 4334 9396 4350 9397
4350 9349
TIME...MOT...LOC 1927Z 275DEG 33KT 4343 9384
WIND...HAIL 60MPH 1.00IN
$$
SKOW2 follow-up statements
055
WWUS53 KDMX 051944
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
244 PM CDT SAT MAY 5 2012
IAC189-052000-
/O.CON.KDMX.SV.W.0070.000000T0000Z-120505T2000Z/
WINNEBAGO IA-
244 PM CDT SAT MAY 5 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WINNEBAGO
COUNTY UNTIL 300 PM CDT...
AT 241 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED 7
MILES WEST OF LAKE MILLS...OR 30 MILES NORTHWEST OF MASON
CITY...MOVING EAST AT 40 MPH. THIS THUNDERSTORM IS ALSO CAPABLE OF
PRODUCING DAMAGING WINDS OF OVER 60 MPH.
LOCATIONS IMPACTED INCLUDE...
LAKE MILLS AND SCARVILLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE FOR LARGE HAIL...DAMAGING WINDS AND DEADLY CLOUD TO GROUND
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A REINFORCED BUILDING AND AWAY FROM WINDOWS.
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS. TURN AROUND DON/T DROWN.
&&
LAT...LON 4349 9349 4326 9350 4326 9351 4326 9353
4334 9394 4350 9383 4350 9350
TIME...MOT...LOC 1943Z 275DEG 33KT 4341 9364
WIND...HAIL 60MPH 1.00IN
$$
SKOW142
WWUS53 KDMX 051959
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
259 PM CDT SAT MAY 5 2012
IAC189-052008-
/O.EXP.KDMX.SV.W.0070.000000T0000Z-120505T2000Z/
WINNEBAGO IA-
259 PM CDT SAT MAY 5 2012
...THE SEVERE THUNDERSTORM WARNING FOR WINNEBAGO COUNTY WILL EXPIRE
AT 300 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF CENTRAL AND
WESTERN WINNEBAGO COUNTY. A NEW SEVERE THUNDERSTORM WARNING HAS BEEN
ISSUED FOR EASTERN WINNEBAGO COUNTY.
LAT...LON 4349 9349 4326 9350 4326 9351 4326 9353
4334 9394 4350 9383 4350 9350
TIME...MOT...LOC 1958Z 275DEG 33KT 4339 9345
$$
SKOWThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 10:27 PM CDT | Severe Thunderstorm Warning | DMX | Palo Alto, Pocahontas | 48 min |
| May 5, 2:31 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Crawford | 33 min |
| May 5, 1:57 PM CDT | Severe Thunderstorm Warning | DMX | Kossuth, Winnebago | 33 min |
| May 5, 2:54 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Winnebago, Worth | 66 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.