Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 164, NWS Sioux Falls, SD

July 15, 1998Nobles County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 15, 1998, 12:26 AM CDT for Nobles County, Minnesota. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 15, 1998, 12:26 AM CDT (05:26 UTC)
Expired: Jul 15, 1998, 1:00 AM CDT
In force: 34 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

County Nobles County, MN

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 14, 8:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 5.4 hours before the alert went out and 216 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: 2121 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 1376 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 150526 RRA
SVRFSD
MNC105-150600-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1226 AM CDT WED JUL 15 1998

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN NOBLES COUNTY IN SOUTHWESTERN MINNESOTA

* UNTIL 100 AM CDT

* AT 1223 AM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED LARGE HAIL 9 MILES SOUTHWEST OF WORTHINGTON  OR 4 MILES
  NORTH OF BIGELOW MOVING SOUTH AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BIGELOW                  AROUND 1230 AM CDT

GOLFBALL SIZE HAIL WAS REPORTED AT RUSHMORE AT 1220 AM CDT.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE XWEATHER IN A
STRONG BUILDING.  DAMAGING WINDS AND LARGE HAIL OCCUR WITH SEVERE
THUNDERSTORMS.  STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS
PASSED.

FUHS



&

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Sioux Falls, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 14, 9:00 PM CDT, 3 hours 26 minutes earlier.

Area forecast discussion, Jul 14, 9:00 PM CDT, 3 hours 26 minutes before

AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
900 PM CDT TUE JUL 14 1998

MAINLY UPDATING CRNT ZONES FOR CONVECTIVE WATCH BOXES. STRONG TSTMS
HAVE DEVELOPED SW OF THE LINE IN NERN SD AND WCNTRL MN. DIR SHEAR
IS FAVORABLE FOR CONVECTIVE DEVELOPMENT AND CAP MAY BE BEGINNING
TO BREAK IN NRN PART OF CWA. FURTHER UPDATES WL PROBABLY BE ISSUED
FOR EXPIRATION OF WATCH BOXES AND DEVELOPMENT OF NEW TSTM ACTIVITY.
FOR GENERALY WEATHER...WINDS AND LOWS LOOK TO BE ON TRACK.

.FSD...NONE
 FUHS

In the hours before

Special weather statement, Jul 14, 10:47 PM CDT, 1 hour 39 minutes before

SDZ038>040-052-053-057-150400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1047 PM CDT TUE JUL 14 1998

...TORNADO WATCH NUMBER 743 EXPIRES...

TORNADO WATCH NUMBER 743 HAS BEEN ALLOWED TO EXPIRE AT 1000 PM
CDT FOR BRULE...JERAULD...BEADLE...SANBORN...KINGSBURY...AND
BROOKINGS COUNTIES.

A SEVERE THUNDERSTORM WATCH HAS REPLACED THIS WATCH FOR THE
COUNTIES OF SANBORN...BEADLE...KINGSBURY...AND BROOKINGS.  THIS
SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 2AM CDT.

CHAPMAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 10:29 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln	36 min
Jul 14, 10:34 PM CDT	Severe Thunderstorm Warning	FSD	Lyon	31 min
Jul 14, 11:02 PM CDT	Severe Thunderstorm Warning	FSD	Murray, Pipestone	48 min
Jul 14, 11:07 PM CDT	Severe Thunderstorm Warning	FSD	Cottonwood	33 min
Jul 14, 11:10 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Lyon	35 min
Jul 14, 11:42 PM CDT	Severe Thunderstorm Warning	FSD	Nobles, Rock	33 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1998 Every severe thunderstorm warning in 1998

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.