Alert archive / Iowa / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 69, NWS Des Moines, IA

May 5, 2012Kossuth County, Winnebago County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 5, 2012, 1:57 PM CDT for Kossuth County, Winnebago County, Iowa. It was in force for 33 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 5, 2012, 1:57 PM CDT (18:57 UTC)
Expired
May 5, 2012, 2:30 PM CDT
In force
33 min
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Kossuth County, IA, Winnebago County, IA

The radar

The Minneapolis radar (KMPX), 164 km from the middle of the area, began a volume at 18:59 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 5, 11:38 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.0 hours before the alert went out and 163 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 2012-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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 2012-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 174 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
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

Open this sounding in Storm Lab

The text

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

516 
WUUS53 KDMX 051857
SVRDMX
IAC109-189-051930-
/O.NEW.KDMX.SV.W.0069.120505T1857Z-120505T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
157 PM CDT SAT MAY 5 2012

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN KOSSUTH COUNTY IN NORTH CENTRAL IOWA...
  NORTHWESTERN WINNEBAGO COUNTY IN NORTH CENTRAL IOWA...

* UNTIL 230 PM CDT

* AT 156 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED 11 MILES NORTH OF BANCROFT...OR 26 MILES NORTH OF
  ALGONA...AND MOVING EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BUFFALO CENTER...LEDYARD...LAKOTA...RAKE AND THOMPSON.

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 4332 9378 4339 9438 4351 9433 4350 9372
TIME...MOT...LOC 1857Z 272DEG 30KT 4345 9422
WIND...HAIL <50MPH 1.00IN

$$

SKOW
2 follow-up statements
799 
WWUS53 KDMX 051912
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
212 PM CDT SAT MAY 5 2012

IAC109-189-051930-
/O.CON.KDMX.SV.W.0069.000000T0000Z-120505T1930Z/
KOSSUTH IA-WINNEBAGO IA-
212 PM CDT SAT MAY 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
WINNEBAGO AND NORTHEASTERN KOSSUTH COUNTIES UNTIL 230 PM CDT...

AT 210 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED 7 MILES NORTHWEST OF BUFFALO CENTER...OR 27 MILES
NORTH OF ALGONA...MOVING EAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  BUFFALO CENTER...RAKE AND THOMPSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4337 9420 4350 9416 4350 9372 4332 9378
TIME...MOT...LOC 1912Z 272DEG 30KT 4344 9405
WIND...HAIL <50MPH 1.00IN

$$

SKOW
258 
WWUS53 KDMX 051931
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
231 PM CDT SAT MAY 5 2012

IAC109-189-051939-
/O.EXP.KDMX.SV.W.0069.000000T0000Z-120505T1930Z/
KOSSUTH IA-WINNEBAGO IA-
231 PM CDT SAT MAY 5 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN KOSSUTH AND 
NORTHWESTERN WINNEBAGO COUNTIES WILL EXPIRE AT 230 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA. A NEW SEVERE THUNDERSTORM WARNING HAS BEEN ISSUED FOR 
WINNEBAGO COUNTY.

LAT...LON 4337 9420 4350 9416 4350 9372 4332 9378
TIME...MOT...LOC 1929Z 272DEG 30KT 4343 9385

$$

SKOW

The office that day

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

IssuedProductOfficeCountiesLasted
May 4, 10:27 PM CDTSevere Thunderstorm WarningDMXPalo Alto, Pocahontas48 min
May 5, 2:31 AM CDTSevere Thunderstorm WarningDMXCarroll, Crawford33 min
May 5, 2:28 PM CDTSevere Thunderstorm WarningDMXWinnebago32 min
May 5, 2:54 PM CDTSevere Thunderstorm WarningDMXCerro Gordo, Winnebago, Worth66 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.