Alert archive / Iowa / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 151, NWS Sioux Falls, SD

June 14, 2012Woodbury County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 14, 2012, 6:47 PM CDT for Woodbury County, Iowa. It was in force for 23 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
Jun 14, 2012, 6:47 PM CDT (23:47 UTC)
Expired
Jun 14, 2012, 7:10 PM CDT
In force
23 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon
Hail
1.25 in
Wind
58.0 mph

County Woodbury County, IA

The radar

The Omaha radar (KOAX), 130 km from the middle of the area, began a volume at 23:50 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

TimeReportWhereRemark
Jun 14, 6:50 PM CDTHAIL 0.756 S Moville, IA
Jun 14, 6:50 PM CDTHAIL 17 Sse Moville, IA
Jun 14, 6:52 PM CDTHAIL 0.759 S Moville, 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.

IssuedProductOfficeLasted
Jun 14, 3:27 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 11.8 hours before the alert went out and 130 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, Omaha, NE at 12:00Z on 2012-06-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1190 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, Omaha, NE at 12:00Z on 2012-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 square meters per square second.193958Sfc1 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
1190 J/kg
Mixed-layer CIN
-322 J/kg
Mixed-layer LCL
951 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
158 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

540 
WUUS53 KFSD 142347
SVRFSD
IAC193-150030-
/O.NEW.KFSD.SV.W.0151.120614T2347Z-120615T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
647 PM CDT THU JUN 14 2012

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN WOODBURY COUNTY IN WEST CENTRAL IOWA...

* UNTIL 730 PM CDT

* AT 647 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR
  SIZE HAIL.  THIS STORM WAS LOCATED 7 MILES SOUTH OF MOVILLE...OR 20
  MILES EAST OF SIOUX CITY...AND MOVING EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ANTHON AROUND 705 PM CDT...
  CORRECTIONVILLE AROUND 715 PM CDT...
  CUSHING AROUND 730 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4244 9607 4249 9574 4248 9574 4248 9568
      4247 9567 4231 9567 4226 9610
TIME...MOT...LOC 2347Z 262DEG 20KT 4239 9599
WIND...HAIL <58MPH 1.25IN

$$

WEISSER
1 follow-up statement
573 
WWUS53 KFSD 150010
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
710 PM CDT THU JUN 14 2012

IAC193-150021-
/O.CAN.KFSD.SV.W.0151.000000T0000Z-120615T0030Z/
WOODBURY IA-
710 PM CDT THU JUN 14 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL WOODBURY COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY...HOWEVER HEAVY RAIN IS STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 4244 9607 4249 9574 4248 9574 4248 9568
      4247 9567 4231 9567 4226 9610
TIME...MOT...LOC 0011Z 262DEG 20KT 4241 9581

$$

WEISSER

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 14, 5:06 PM CDTSevere Thunderstorm WarningFSDIda, Woodbury39 min
Jun 14, 6:01 PM CDTSevere Thunderstorm WarningFSDBuena Vista29 min
Jun 14, 6:25 PM CDTSevere Thunderstorm WarningFSDClay, O'Brien35 min
Jun 14, 6:28 PM CDTSevere Thunderstorm WarningFSDBuena Vista, Clay17 min
Jun 14, 6:31 PM CDTSevere Thunderstorm WarningFSDCherokee, Ida, Plymouth, Woodbury29 min
Jun 14, 6:50 PM CDTSevere Thunderstorm WarningFSDCherokee26 min
Jun 14, 6:56 PM CDTSevere Thunderstorm WarningFSDClay34 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.