Alert archive / Iowa / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 76, NWS Sioux Falls, SD

June 23, 2003Cherokee County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 23, 2003, 11:53 PM CDT for Cherokee County, Iowa. It was in force for 22 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
Jun 23, 2003, 11:53 PM CDT (04:53 UTC)
Expired
Jun 24, 2003, 12:15 AM CDT
In force
22 min
Issued by
NWS Sioux Falls, SD
Area
Counties, with a storm outline in the text

County Cherokee County, IA

The radar

The Sioux Falls radar (KFSD), 123 km from the middle of the area, began a volume at 04:56 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
Jun 23, 8:55 PM CDTTornado WatchSPC4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 4.9 hours before the alert went out and 285 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 00:00Z on 2003-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1955 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 00:00Z on 2003-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 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
1955 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1314 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
79 m²/s²
Significant tornado parameter
0.8
Supercell composite
6.7

Open this sounding in Storm Lab

The text

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

076 
WUUS53 KFSD 240453
SVRFSD
IAC035-240515-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1152 PM CDT MON JUN 23 2003

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHEROKEE COUNTY IN NORTHWEST IOWA

* UNTIL 1215 AM CDT

* AT 1152 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS PRODUCING DAMAGING WINDS FROM 6 MILES 
  NORTHWEST OF MARCUS TO 12 MILES WEST OF QUIMBY...OR FROM 6 MILES 
  NORTHWEST OF MARCUS TO 5 MILES EAST OF KINGSLEY...MOVING EAST AT 
  20 MPH.  ANOTHER SEVERE STORM WILL LINGER THROUGH 1215 AM IN AREAS
  NORTHEAST OF LARRABEE.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  MARCUS AROUND MIDNIGHT CDT
  CLEGHORN AROUND 1210 AM CDT
  QUIMBY...CHEROKEE AROUND 1215 AM CDT

THIS EXTENDS THE PREVIOUS WARNING FOR CHEROKEE COUNTY.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE AREA. SEVERE THUNDERSTORMS
CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. PREPARE TO
MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE SUCH AS A BASEMENT OR
SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WIND. GO INSIDE A
STURDY BUILDING AND STAY AWAY FROM WINDOWS.

LAT...LON 4291 9587 4259 9586 4257 9542 4292 9541

$$
CHAPMAN

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 23, 9:12 PM CDTSevere Thunderstorm WarningFSDWoodbury48 min
Jun 23, 9:37 PM CDTSevere Thunderstorm WarningFSDPlymouth23 min
Jun 23, 10:02 PM CDTSevere Thunderstorm WarningFSDWoodbury28 min
Jun 23, 10:22 PM CDTSevere Thunderstorm WarningFSDCherokee, Plymouth38 min
Jun 23, 10:38 PM CDTSevere Thunderstorm WarningFSDBuena Vista52 min
Jun 23, 10:50 PM CDTTornado WarningFSDIda, Woodbury25 min
Jun 23, 11:12 PM CDTSevere Thunderstorm WarningFSDPlymouth48 min
Jun 23, 11:19 PM CDTSevere Thunderstorm WarningFSDWoodbury56 min
Jun 23, 11:21 PM CDTSevere Thunderstorm WarningFSDCherokee39 min
Jun 23, 11:31 PM CDTSevere Thunderstorm WarningFSDSioux44 min
Jun 23, 11:37 PM CDTSevere Thunderstorm WarningFSDClay, O'Brien53 min
Jun 23, 11:55 PM CDTSevere Thunderstorm WarningFSDIda65 min
Jun 24, 12:05 AM CDTSevere Thunderstorm WarningFSDPlymouth25 min
Jun 24, 12:16 AM CDTSevere Thunderstorm WarningFSDBuena Vista, Cherokee44 min
Jun 24, 12:52 AM CDTSevere Thunderstorm WarningFSDIda, Woodbury38 min
Jun 24, 2:25 AM CDTFlash Flood WarningFSDCherokee, Ida, Woodbury4 hr

Nearby

Severe Thunderstorm Warnings in Iowa, 2003Every severe thunderstorm warning in 2003

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.