Alert archive / South Dakota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 135, NWS Sioux Falls, SD

July 5, 1998Charles Mix County, Douglas County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 5, 1998, 9:33 PM CDT for Charles Mix County, Douglas County, South Dakota. It was in force for 32 min. 3 reports 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 5, 1998, 9:33 PM CDT (02:33 UTC)
Expired: Jul 5, 1998, 10:05 PM CDT
In force: 32 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

Counties Charles Mix County, SD, Douglas County, SD

What was reported inside it

Time	Report	Where
Jul 5, 9:35 PM CDT	Thunderstorm Wind 52	Armour, SD
Jul 5, 9:45 PM CDT	Thunderstorm Wind 52	Wagner, SD
Jul 5, 9:45 PM CDT	Hail 0.75	Wagner, SD

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 nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 2.6 hours before the alert went out and 178 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: 2216 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 844 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 7.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 060233 RRA
SVRFSD
SDC023-043-060305-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
933 PM CDT SUN JUL 5 1998

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CHARLES MIX COUNTY IN SOUTHEASTERN SOUTH DAKOTA
  SOUTHERN DOUGLAS COUNTY IN SOUTH CENTRAL SOUTH DAKOTA

* UNTIL 1005 PM CDT

* AT 929 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A SEVERE THUNDERSTORM 14 MILES NORTH OF LAKE ANDES  OR 14 MILES
  NORTH OF LAKE ANDES MOVING SOUTH AT 25 MPH.

AT 915 PM CDT 60 MPH WINDS WERE REPORTED 15 MILES NORTHWEST OF
CORSICA.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ARMOUR                   AROUND 935 PM CDT
  DELMONT                  AROUND 940 PM CDT
  LAKE ANDES               AROUND 945 PM CDT
  WAGNER                   AROUND 1000 PM CDT


WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DO NOT USE TELEPHONES OR
ELECTRICAL APPLIANCES UNTIL THE STORM HAS PASSED UNLESS IN AN
EMERGENCY.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

THIS WARNING REPLACES THE PREVIOUS WARNING FOR ALL OF pDOUGLAS
COUNTY.

&
WILLIAMS

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 5, 8:30 PM CDT, 1 hour 3 minutes earlier.

Area forecast discussion, Jul 5, 8:30 PM CDT, 1 hour 3 minutes before

AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
830 PM CDT SUN JUL 5 1998

CURNT FCST LOOKS OK FOR NOW...WILL PRBLY BE ABLE TO UPDATE LATER THIS
EVE WHEN CURNT STORMS MOVE OUT OR DIE AS WE DONT THINK THERE WILL BE
MORE TNGT. REST OF FCST LOOKS OK.

.FSD...NONE
WILLIAMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 7:34 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule	51 min
Jul 5, 8:26 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule	29 min
Jul 5, 8:56 PM CDT	Severe Thunderstorm Warning	FSD	Douglas	34 min
Jul 6, 8:10 AM CDT	Severe Thunderstorm Warning	FSD	Brule	35 min
Jul 6, 8:48 AM CDT	Severe Thunderstorm Warning	FSD	Brule	32 min
Jul 6, 9:21 AM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Douglas	49 min
Jul 6, 10:04 AM CDT	Severe Thunderstorm Warning	FSD	Charles Mix	46 min
Jul 6, 10:11 AM CDT	Severe Thunderstorm Warning	FSD	Douglas	34 min
Jul 6, 1:31 PM CDT	Severe Thunderstorm Warning	FSD	Brule	49 min
Jul 6, 1:53 PM CDT	Severe Thunderstorm Warning	FSD	Aurora	47 min
Jul 6, 2:00 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix	35 min
Jul 6, 2:16 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Douglas	34 min
Jul 6, 2:39 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix	36 min
Jul 6, 2:46 PM CDT	Severe Thunderstorm Warning	FSD	Hutchinson	49 min
Jul 6, 3:18 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix	32 min
Jul 6, 3:54 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Yankton	36 min
Jul 6, 4:30 PM CDT	Severe Thunderstorm Warning	FSD	Yankton	35 min
Jul 6, 5:33 PM CDT	Severe Thunderstorm Warning	FSD	Clay	32 min
Jul 6, 5:37 PM CDT	Flash Flood Warning	FSD	Yankton	2 hr

Nearby

Severe Thunderstorm Warnings in South Dakota, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.