Alert archive / Iowa / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 65, NWS Sioux Falls, SD

June 23, 2003Buena Vista County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 23, 2003, 10:38 PM CDT for Buena Vista County, Iowa. It was in force for 52 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, 10:38 PM CDT (03:38 UTC)
Expired: Jun 23, 2003, 11:30 PM CDT
In force: 52 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

County Buena Vista County, IA

The radar

The Sioux Falls radar (KFSD), 147 km from the middle of the area, began a volume at 03:41 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.

Issued	Product	Office	Lasted
Jun 23, 8:55 PM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.6 hours before the alert went out and 266 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: 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.

683 
WUUS53 KFSD 240338
SVRFSD
IAC021-240430-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1038 PM CDT MON JUN 23 2003

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BUENA VISTA COUNTY IN NORTHWEST IOWA

* UNTIL 1130 PM CDT

* AT 1037 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES NORTHWEST OF ALTA...OR ABOUT 2 MILES
  NORTHEAST OF AURELIA...MOVING NORTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  TRUESDALE AROUND 1055 PM
  REMBRANDT AROUND 1105 PM

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 LARGE HAIL. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS.

LAT...LON 4282 9540 4264 9540 4275 9502 4292 9519

$$
CHAPMAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 9:12 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	48 min
Jun 23, 9:37 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	23 min
Jun 23, 10:02 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	28 min
Jun 23, 10:22 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Plymouth	38 min
Jun 23, 10:50 PM CDT	Tornado Warning	FSD	Ida, Woodbury	25 min
Jun 23, 11:12 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	48 min
Jun 23, 11:19 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	56 min
Jun 23, 11:21 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee	39 min
Jun 23, 11:31 PM CDT	Severe Thunderstorm Warning	FSD	Sioux	44 min
Jun 23, 11:37 PM CDT	Severe Thunderstorm Warning	FSD	Clay, O'Brien	53 min
Jun 23, 11:53 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee	22 min
Jun 23, 11:55 PM CDT	Severe Thunderstorm Warning	FSD	Ida	65 min
Jun 24, 12:05 AM CDT	Severe Thunderstorm Warning	FSD	Plymouth	25 min
Jun 24, 12:16 AM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee	44 min
Jun 24, 12:52 AM CDT	Severe Thunderstorm Warning	FSD	Ida, Woodbury	38 min
Jun 24, 2:25 AM CDT	Flash Flood Warning	FSD	Cherokee, Ida, Woodbury	4 hr

Nearby

Severe Thunderstorm Warnings in Iowa, 2003 Every 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.