Alert archive / Iowa / Tornado Warnings in 2003

Tornado Warning 7, NWS Sioux Falls, SD

June 23, 2003Ida County, Woodbury County, Iowa

NWS Sioux Falls, SD issued this tornado warning at Jun 23, 2003, 10:50 PM CDT for Ida County, Woodbury County, Iowa. It was in force for 25 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, 10:50 PM CDT (03:50 UTC)
Expired: Jun 23, 2003, 11:15 PM CDT
In force: 25 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

Counties Ida County, IA, Woodbury County, IA

The radar

The Omaha radar (KOAX), 141 km from the middle of the area, began a volume at 03:54 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, 3.8 hours before the alert went out and 313 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.

991 
WFUS53 KFSD 240350
TORFSD
IAC093-193-240415-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1049 PM CDT MON JUN 23 2003

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  EXTREME NORTHEASTERN WOODBURY COUNTY IN NORTHWEST IOWA
  NORTHERN IDA COUNTY IN NORTHWEST IOWA

* UNTIL 1115 PM CDT

* AT 1049 PM CDT...LAW ENFORCEMENT REPORTED A TORNADO NEAR   
  CORRECTIONVILLE...MOVING EAST AT 15 MPH.

* SOME LOCATIONS AFFECTED...
  RURAL AREAS WEST OF HOLSTEIN THROUGH 1115 PM CDT

TAKE COVER NOW. TORNADOES AT NIGHT ARE EXTREMELY DANGEROUS. DO NOT
WAIT UNTIL YOU SEE OR HEAR THE TORNADO. IT MAY BE TOO LATE.

LAT...LON 4251 9586 4244 9586 4248 9551 4256 9563

$$
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, 10:38 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista	52 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

Tornado Warnings in Iowa, 2003 Every tornado warning in 2003 Tornadoes 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.