Alert archive / Iowa / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 87, NWS Sioux Falls, SD

June 7, 2002O'Brien County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 7, 2002, 6:13 PM CDT for O'Brien County, Iowa. It was in force for 32 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 7, 2002, 6:13 PM CDT (23:13 UTC)
Expired: Jun 7, 2002, 6:45 PM CDT
In force: 32 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

County O'Brien County, IA

The radar

The Sioux Falls radar (KFSD), 103 km from the middle of the area, began a volume at 23:15 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 7, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 11.2 hours before the alert went out and 194 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1517 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFSD 072313
SVRFSD
IAC141-072345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
612 PM CDT FRI JUN 7 2002

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

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

* UNTIL 645 PM CDT

* AT 612 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES WEST OF PAULLINA...MOVING EAST AT 30
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  PAULLINA AROUND 620 PM CDT
  CALUMET AROUND 630 PM CDT
  SUTHERLAND AROUND 640 PM CDT

AT 545 PM CDT...A WIND GUST OF 77 MPH WAS REPORTED BY AUTOMATED 
EQUIPMENT IN ORANGE CITY.

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

LAT...LON 4305 9586 4292 9587 4292 9557 4306 9555

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 7, 5:01 PM CDT	Severe Thunderstorm Warning	FSD	Lyon, Sioux	29 min
Jun 7, 5:41 PM CDT	Severe Thunderstorm Warning	FSD	Sioux	34 min
Jun 7, 5:47 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	43 min
Jun 7, 5:49 PM CDT	Tornado Warning	FSD	O'Brien	26 min
Jun 7, 5:59 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee	46 min
Jun 7, 6:03 PM CDT	Severe Thunderstorm Warning	FSD	Dickinson, Osceola	42 min
Jun 7, 6:29 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	46 min
Jun 7, 6:41 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	34 min
Jun 7, 6:42 PM CDT	Severe Thunderstorm Warning	FSD	Clay	18 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2002 Every severe thunderstorm warning in 2002

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.