Alert archive / Minnesota / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 104, NWS Sioux Falls, SD

June 8, 1999Murray County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 8, 1999, 11:29 PM CDT for Murray County, Minnesota. It was in force for 31 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
Jun 8, 1999, 11:29 PM CDT (04:29 UTC)
Expired
Jun 9, 1999, 12:00 AM CDT
In force
31 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Murray County, MN

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 4.5 hours before the alert went out and 195 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 1999-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1002 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 1999-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 245 square meters per square second.19395878Sfc1 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
1002 J/kg
Mixed-layer CIN
-159 J/kg
Mixed-layer LCL
1650 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
245 m²/s²
0-3 km storm-relative helicity
309 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Jun 8, 9:55 PM CDT, 1 hour 34 minutes earlier.

Area forecast discussion, Jun 8, 9:55 PM CDT, 1 hour 34 minutes before
AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
955 PM CDT TUE JUN 8 1999

STORM WHICH PRODUCED UP TO GOLFBALL SIZE HAIL EARLIER DISSIPATED AS
IT APPROACHED FSD...WHERE WINDOW CHECK REVEALED BACKWARD TILT TO
STORM.  NICE MAMMATUS...BUT NOT MUCH UNDERNEATH IT. ANOTHER ISOLATED
CELL POPPED UP NORTHEAST OF MHE...BUT CALLS TO AREA INDICATE THIS
TOO HAS LITTLE LOW LEVEL STRUCTURE...WITH LITTLE RAIN AND NO HAIL
REPORTED.  LOOP OF KLNX RADAR SHOWS LINE APPEARS TO BE WEAKENING
SOMEWHAT AS IT MOVES NORTHEAST...BUT STILL WARRANTS SOME WATCHING
AS AN ISOLATED HAIL OR WIND REPORT CANNOT BE RULED OUT.  LATEST RUC
STILL SHOWS 40-50KT LLJ AIMED AT WESTERN CWA OVERNIGHT...AND WITH
APPROACHING STORMS...HAVE UPPED POPS IN SOUTHWEST COUNTIES.  LITTLE
CHANGE TO REMAINDER OF ZONE SET OTHER THAN CLEANING UP WINDS AND
PUSHING TSRA CHANCES TO AFTER MIDNIGHT EVERYWHERE EXCEPT WESTERN
ARE$A.

.FSD...NONE

In the hours before

Local storm report, Jun 8, 8:46 PM CDT, 2 hours 43 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
846 PM CDT TUE JUN 08 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0813 PM    PARKER                    SD    1 INCH HAIL
06/08/99   TURNER

0827 PM    12 SE PARKER              SD    1.75 INCH HAIL
06/08/99   TURNER

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 8, 8:15 PM CDTSevere Thunderstorm WarningFSDTurner30 min
Jun 8, 10:18 PM CDTSevere Thunderstorm WarningFSDBrule, Jerauld42 min
Jun 8, 10:42 PM CDTSevere Thunderstorm WarningFSDJerauld33 min
Jun 8, 10:56 PM CDTSevere Thunderstorm WarningFSDKingsbury34 min
Jun 9, 12:40 AM CDTFlash Flood WarningFSDDouglas, Hutchinson110 min
Jun 9, 1:40 PM CDTSevere Thunderstorm WarningFSDClay, Dickinson30 min
Jun 9, 2:09 PM CDTSevere Thunderstorm WarningFSDClay, Dickinson31 min
Jun 9, 6:50 PM CDTSevere Thunderstorm WarningFSDCherokee25 min
Jun 9, 6:53 PM CDTSevere Thunderstorm WarningFSDIda52 min
Jun 9, 6:59 PM CDTSevere Thunderstorm WarningFSDWoodbury46 min
Jun 8, 11:10 PM CDTSevere Thunderstorm WarningFSDLincoln, Lyon35 min
Jun 8, 11:44 PM CDTSevere Thunderstorm WarningFSDLincoln, Lyon46 min
Jun 9, 12:29 AM CDTSevere Thunderstorm WarningFSDLincoln, Lyon61 min
Jun 9, 4:00 AM CDTFlash Flood WarningFSDLincoln, Pipestone2 hr
Jun 9, 2:03 PM CDTSevere Thunderstorm WarningFSDJackson32 min
Jun 9, 2:59 PM CDTSevere Thunderstorm WarningFSDCottonwood31 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1999Every severe thunderstorm warning in 1999

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.