Alert archive / Iowa / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 146, NWS Sioux Falls, SD

June 14, 2012Ida County, Woodbury County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 14, 2012, 5:06 PM CDT for Ida County, Woodbury County, Iowa. It was in force for 39 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: Jun 14, 2012, 5:06 PM CDT (22:06 UTC)
Expired: Jun 14, 2012, 5:45 PM CDT
In force: 39 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 70.0 mph

Counties Ida County, IA, Woodbury County, IA

The radar

The Omaha radar (KOAX), 138 km from the middle of the area, began a volume at 22:06 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
Jun 14, 5:20 PM CDT	HAIL 0.75	4 Sse Cushing, 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
Jun 14, 3:27 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.1 hours before the alert went out and 138 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

866 
WUUS53 KFSD 142206
SVRFSD
IAC093-193-142245-
/O.NEW.KFSD.SV.W.0146.120614T2206Z-120614T2245Z/

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

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

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

* UNTIL 545 PM CDT

* AT 506 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR
  SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM
  WAS LOCATED NEAR DANBURY...OR 16 MILES WEST OF IDA GROVE...AND
  MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BATTLE CREEK AROUND 520 PM CDT...
  IDA GROVE AROUND 535 PM CDT...
  ARTHUR AND GALVA AROUND 545 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 4222 9583 4236 9582 4253 9539 4252 9538
      4248 9538 4248 9533 4247 9531 4221 9532
TIME...MOT...LOC 2206Z 249DEG 26KT 4230 9575
WIND...HAIL 70MPH 1.25IN

$$

WEISSER

2 follow-up statements

329 
WWUS53 KFSD 142223
SVSFSD

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

IAC093-193-142245-
/O.CON.KFSD.SV.W.0146.000000T0000Z-120614T2245Z/
IDA IA-WOODBURY IA-
523 PM CDT THU JUN 14 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
WOODBURY AND IDA COUNTIES UNTIL 545 PM CDT...

AT 523 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL...
AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS LOCATED
NEAR BATTLE CREEK...OR 8 MILES WEST OF IDA GROVE...MOVING EAST AT 30
MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  BATTLE CREEK AROUND 525 PM CDT... 
  IDA GROVE AROUND 535 PM CDT...
  ARTHUR AND GALVA AROUND 545 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 4222 9583 4236 9582 4253 9539 4252 9538
      4248 9538 4248 9533 4247 9531 4221 9532
TIME...MOT...LOC 2223Z 249DEG 26KT 4234 9559
WIND...HAIL 70MPH 1.25IN

$$

WEISSER

933 
WWUS53 KFSD 142243
SVSFSD

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

IAC093-193-142253-
/O.EXP.KFSD.SV.W.0146.000000T0000Z-120614T2245Z/
IDA IA-WOODBURY IA-
543 PM CDT THU JUN 14 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WOODBURY AND IDA
COUNTIES WILL EXPIRE AT 545 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR 
PROPERTY. HAIL TO THE SIZE OF NICKELS WILL STILL BE POSSIBLE IN FAR 
SOUTHERN IDA COUNTY THROUGH 600 PM CDT.

LAT...LON 4222 9583 4236 9582 4253 9539 4252 9538
      4248 9538 4248 9533 4247 9531 4221 9532
TIME...MOT...LOC 2243Z 249DEG 26KT 4239 9541

$$

WEISSER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 6:01 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista	29 min
Jun 14, 6:25 PM CDT	Severe Thunderstorm Warning	FSD	Clay, O'Brien	35 min
Jun 14, 6:28 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Clay	17 min
Jun 14, 6:31 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Ida, Plymouth, Woodbury	29 min
Jun 14, 6:47 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	23 min
Jun 14, 6:50 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee	26 min
Jun 14, 6:56 PM CDT	Severe Thunderstorm Warning	FSD	Clay	34 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2012 Every 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.