Alert archive / Iowa / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 93, NWS Sioux Falls, SD

June 13, 2000Woodbury County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 13, 2000, 2:35 PM CDT for Woodbury County, Iowa. It was in force for 25 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 13, 2000, 2:35 PM CDT (19:35 UTC)
Expired: Jun 13, 2000, 3:00 PM CDT
In force: 25 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

County Woodbury County, IA

The radar

The Omaha radar (KOAX), 122 km from the middle of the area, began a volume at 19:34 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 13, 2:45 PM CDT	Thunderstorm Wind 52 E	Sioux City, IA	Thunderstorm winds caused tree damage.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

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 13, 2:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 7.6 hours before the alert went out and 122 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: 997 J/kg
Mixed-layer CIN: -254 J/kg
Mixed-layer LCL: 1473 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 83 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 131936
SVRFSD
IAC193-132000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
235 PM CDT TUE JUN 13 2000

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN WOODBURY COUNTY IN NORTHWEST IOWA

* UNTIL 300 PM CDT

* AT 235 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES WEST OF SERGEANT BLUFF...OR ABOUT 7
  MILES SOUTHWEST OF SIOUX CITY...MOVING NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SIOUX CITY AROUND 240 PM CDT
 
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS IN EXCESS OF 58 MPH...LARGE HAIL...AND DEADLY
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

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.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN SIOUX FALLS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 2:02 PM CDT	Severe Thunderstorm Warning	FSD	Sioux	28 min
Jun 13, 2:32 PM CDT	Severe Thunderstorm Warning	FSD	Sioux	28 min
Jun 13, 3:37 PM CDT	Severe Thunderstorm Warning	FSD	Clay	23 min
Jun 13, 3:40 PM CDT	Flash Flood Warning	FSD	Cherokee, O'Brien, Plymouth, Sioux, Woodbury	2 hr
Jun 13, 3:40 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, O'Brien	35 min
Jun 13, 4:01 PM CDT	Flash Flood Warning	FSD	Clay, Dickinson	119 min
Jun 13, 4:01 PM CDT	Severe Thunderstorm Warning	FSD	Clay	29 min
Jun 13, 4:18 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista	27 min
Jun 13, 4:19 PM CDT	Severe Thunderstorm Warning	FSD	Clay	26 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2000 Every severe thunderstorm warning in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.