Alert archive / Iowa / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 48, NWS Des Moines, IA

May 3, 2012Kossuth County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 3, 2012, 5:06 PM CDT for Kossuth County, Iowa. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 3, 2012, 5:06 PM CDT (22:06 UTC)
Expired
May 3, 2012, 5:45 PM CDT
In force
39 min
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Kossuth County, IA

The radar

The Des Moines radar (KDMX), 162 km from the middle of the area, began a volume at 22:09 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.1 hours before the alert went out and 191 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.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2012-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1755 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2012-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

354 
WUUS53 KDMX 032206
SVRDMX
IAC109-032245-
/O.NEW.KDMX.SV.W.0048.120503T2206Z-120503T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
506 PM CDT THU MAY 3 2012

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL KOSSUTH COUNTY IN NORTH CENTRAL IOWA...

* UNTIL 545 PM CDT

* AT 502 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED 8 MILES NORTH OF ALGONA...AND MOVING EAST AT 15
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  TITONKA AND WESLEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

LARGE HAIL CAN CAUSE INJURY AND PROPERTY DAMAGE. SEEK SAFETY INDOORS
UNTIL THE STORM PASSES.

&&

LAT...LON 4323 9397 4307 9397 4307 9398 4315 9424
      4324 9421
TIME...MOT...LOC 2206Z 282DEG 12KT 4318 9416
WIND...HAIL <50MPH 1.00IN

$$

COGIL
2 follow-up statements
545 
WWUS53 KDMX 032231
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
531 PM CDT THU MAY 3 2012

IAC109-032245-
/O.CON.KDMX.SV.W.0048.000000T0000Z-120503T2245Z/
KOSSUTH IA-
531 PM CDT THU MAY 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
KOSSUTH COUNTY UNTIL 545 PM CDT...

AT 530 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED 12 MILES WEST OF BRITT...OR 12 MILES NORTHEAST OF
ALGONA...MOVING EAST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  WESLEY.

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 4323 9397 4307 9397 4307 9398 4311 9412
      4323 9406
TIME...MOT...LOC 2231Z 284DEG 14KT 4315 9402
WIND...HAIL <50MPH 1.00IN

$$

COGIL
176 
WWUS53 KDMX 032238
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
538 PM CDT THU MAY 3 2012

IAC109-032248-
/O.EXP.KDMX.SV.W.0048.000000T0000Z-120503T2245Z/
KOSSUTH IA-
538 PM CDT THU MAY 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL KOSSUTH COUNTY
WILL EXPIRE AT 545 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.

LAT...LON 4323 9397 4307 9397 4307 9398 4311 9412
      4323 9406
TIME...MOT...LOC 2238Z 284DEG 14KT 4314 9398

$$

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 3, 5:11 AM CDTSevere Thunderstorm WarningDMXButler, Cerro Gordo, Franklin47 min
May 3, 2:24 PM CDTSevere Thunderstorm WarningDMXKossuth21 min
May 3, 2:48 PM CDTSevere Thunderstorm WarningDMXKossuth42 min
May 3, 3:31 PM CDTSevere Thunderstorm WarningDMXHancock, Kossuth, Winnebago44 min
May 3, 3:48 PM CDTFlash Flood WarningDMXKossuth4 hr
May 3, 4:03 PM CDTSevere Thunderstorm WarningDMXEmmet, Kossuth42 min
May 3, 4:18 PM CDTSevere Thunderstorm WarningDMXCerro Gordo, Hancock, Winnebago, Worth42 min
May 3, 4:52 PM CDTSevere Thunderstorm WarningDMXCerro Gordo53 min
May 3, 6:13 PM CDTSevere Thunderstorm WarningDMXHumboldt47 min
May 3, 6:57 PM CDTSevere Thunderstorm WarningDMXHumboldt48 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.