Alert archive / Iowa / Tornado Warnings in 2000

Tornado Warning 31, NWS Sioux Falls, SD

July 25, 2000Osceola County, Iowa; Nobles County, Minnesota

NWS Sioux Falls, SD issued this tornado warning at Jul 25, 2000, 8:39 PM CDT for Osceola County, Iowa; Nobles County, Minnesota. It was in force for 51 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
Jul 25, 2000, 8:39 PM CDT (01:39 UTC)
Expired
Jul 25, 2000, 9:30 PM CDT
In force
51 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

Counties Osceola County, IA, Nobles County, MN

The radar

The Sioux Falls radar (KFSD), 84 km from the middle of the area, began a volume at 01:41 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.

What was reported inside it

TimeReportWhereRemark
Jul 25, 9:23 PM CDTHail 1.75Worthington, MN

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.

IssuedProductOfficeLasted
Jul 25, 8:30 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 25, 5:15 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.7 hours before the alert went out and 222 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 2000-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1668 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 2000-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 square meters per square second.193958Sfc1 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
1668 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1176 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.9
Supercell composite
5.2

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KFSD 260143
TORFSD

IAC143-MNC105-260230-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
839 PM CDT TUE JUL 25 2000

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEAST OSCEOLA COUNTY IN NORTHWEST IOWA
  NOBLES COUNTY IN SOUTHWEST MINNESOTA

* UNTIL 930 PM CDT

* AT 839 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO OVER RUSHMORE...OR ABOUT 10 MILES WEST OF WORTHINGTON...
  MOVING SOUTHEAST AT 20 MPH.

* THE TORNADO WILL BE NEAR...
  BIGELOW  AROUND 905 PM CDT
  OCHEYEDAN AROUND 920 PM CDT

THERE HAVE BEEN SEVERAL REPORTS OF TORNADOES BY THE PUBLIC IN THE 
ADRIAN AND RUSHMORE AREAS. 

ANOTHER THUNDERSTORM DEVELOPING NEAR WILMONT IS BEGINING TO SHOW A 
TORNADIC SIGNATURE ON RADAR. 

THIS IS AN EXTREMELY DANGEROUS AND POTENTIALLY LIFE THREATENING
SITUATION. IF YOU ARE IN THE PATH OF THIS TORNADO...TAKE COVER
IMMEDIATELY. GO TO THE BASEMENT. IF A BASEMENT IS NOT AVAILABLE...GO
TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 9:41 PM CDTSevere Thunderstorm WarningFSDDickinson, Lyon, Osceola49 min
Jul 25, 10:03 PM CDTSevere Thunderstorm WarningFSDO'Brien, Sioux42 min
Jul 25, 10:10 PM CDTTornado WarningFSDDickinson35 min
Jul 25, 10:17 PM CDTTornado WarningFSDLyon, Sioux43 min
Jul 25, 10:28 PM CDTTornado WarningFSDClay47 min
Jul 25, 10:35 PM CDTSevere Thunderstorm WarningFSDOsceola25 min
Jul 25, 10:51 PM CDTSevere Thunderstorm WarningFSDO'Brien24 min
Jul 25, 10:59 PM CDTSevere Thunderstorm WarningFSDSioux31 min
Jul 25, 11:18 PM CDTSevere Thunderstorm WarningFSDO'Brien27 min
Jul 25, 11:19 PM CDTSevere Thunderstorm WarningFSDBuena Vista, Clay26 min
Jul 25, 11:32 PM CDTSevere Thunderstorm WarningFSDCherokee28 min
Jul 25, 11:47 PM CDTSevere Thunderstorm WarningFSDBuena Vista43 min
Jul 25, 11:59 PM CDTSevere Thunderstorm WarningFSDCherokee31 min
Jul 26, 12:28 AM CDTSevere Thunderstorm WarningFSDBuena Vista32 min
Jul 26, 1:53 AM CDTSevere Thunderstorm WarningFSDClay22 min
Jul 25, 7:13 PM CDTTornado WarningFSDLincoln, Lyon47 min
Jul 25, 7:13 PM CDTTornado WarningFSDMurray47 min
Jul 25, 8:12 PM CDTTornado WarningFSDNobles33 min
Jul 25, 9:29 PM CDTTornado WarningFSDNobles46 min

Nearby

Tornado Warnings in Iowa, 2000Tornado Warnings in Minnesota, 2000Every tornado warning in 2000Tornadoes 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.