Alert archive / Minnesota / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 62, NWS Twin Cities, MN

July 31, 1993Blue Earth County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 31, 1993, 4:31 AM CDT for Blue Earth County, Minnesota. It was in force for 29 min.

The area

The counties it named.

The facts

Issued
Jul 31, 1993, 4:31 AM CDT (09:31 UTC)
Expired
Jul 31, 1993, 5:00 AM CDT
In force
29 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Blue Earth County, MN

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 9.5 hours before the alert went out and 98 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 1993-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1153 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 1993-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 square meters per square second.1939Sfc1 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
1153 J/kg
Mixed-layer CIN
-243 J/kg
Mixed-layer LCL
1041 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
246 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 
TTAA00 KRST 310946 COR
SVRRST
MNC013-043-047-311000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED
NATIONAL WEATHER SERVICE ROCHESTER MN
431 AM CDT SAT JUL 31 1993

THE NATIONAL WEATHER SERVICE IN ROCHESTER MN HAS ISSUED A
SEVERE THUNDERSTORM WARNING     EFFECTIVE UNTIL  500 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN SOUTH CENTRAL MINNESOTA

   ...EASTERN BLUE EARTH COUNTY...EASTERN FARIBAULT COUNTY
   ...WESTERN FREEBORN COUNTY

AT 425 AM RADAR INDICATED A SEVERE THUNDERSTORM NEAR WELLS OR 19 MILES
NORTHWEST OF ALBERT LEA. ANOTHER SEVERE THUNDERSTORM WAS LOCATED
NEAR BUEFORD OR 11 MILES SOUTH OF MANKATO.

THESE STORMS ARE MOVING TO THE EAST AT 30 MPH AND WILL PASS THROUGH
THE CITY OF ALBERT LEA.


WHEN SEVERE THUNDERSTORMS ARE OCCURRING...STAY INSIDE A STRONG
BUILDING.  PROTECT YOURSELF FROM DAMAGING WINDS OR HAIL BY
KEEPING AWAY FROM WINDOWS.  LISTEN TO YOUR RADIO OR TELEVISION...
BUT TURN OFF ALL OTHER EL\ECTRICAL APPLIANCES.  DO NOT USE THE
PHONE DURING PERIODS OF FREQUENT LIGHTNING.



&

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 31, 3:33 AM CDTSevere Thunderstorm WarningMPXBlue Earth, Watonwan27 min
Jul 31, 4:31 AM CDTSevere Thunderstorm WarningMPXFaribault, Freeborn29 min
Jul 31, 5:24 AM CDTSevere Thunderstorm WarningMPXBlue Earth, Le Sueur, Nicollet36 min
Jul 31, 5:43 AM CDTSevere Thunderstorm WarningMPXDodge, Mower32 min
Jul 31, 8:20 AM CDTSevere Thunderstorm WarningMPXMcLeod, Renville, Sibley55 min
Jul 31, 8:34 AM CDTSevere Thunderstorm WarningMPXBrown, Nicollet26 min
Jul 31, 9:14 AM CDTSevere Thunderstorm WarningMPXCarver, Hennepin, Wright61 min
Jul 31, 9:14 AM CDTSevere Thunderstorm WarningMPXMeeker46 min
Jul 31, 9:40 AM CDTSevere Thunderstorm WarningMPXSherburne50 min
Jul 31, 9:49 AM CDTSevere Thunderstorm WarningMPXDakota, Hennepin, Scott43 min
Jul 31, 9:50 AM CDTSevere Thunderstorm WarningMPXSteele30 min
Jul 31, 10:01 AM CDTSevere Thunderstorm WarningMPXAnoka, Chisago, Ramsey, Washington59 min
Jul 31, 10:03 AM CDTSevere Thunderstorm WarningMPXMeeker57 min
Jul 31, 10:20 AM CDTSevere Thunderstorm WarningMPXSherburne55 min
Jul 31, 10:27 AM CDTSevere Thunderstorm WarningMPXStearns63 min
Jul 31, 10:38 AM CDTSevere Thunderstorm WarningMPXMorrison52 min
Jul 31, 11:29 AM CDTSevere Thunderstorm WarningMPXStearns61 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1993Every severe thunderstorm warning in 1993

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.