Alert archive / Minnesota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 151, NWS Twin Cities, MN

July 19, 1994Hennepin County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 19, 1994, 2:37 AM CDT for Hennepin County, Minnesota. It was in force for 54 min.

The area

The counties it named.

The facts

Issued
Jul 19, 1994, 2:37 AM CDT (07:37 UTC)
Expired
Jul 19, 1994, 3:31 AM CDT
In force
54 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Hennepin County, MN

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 7.6 hours before the alert went out and 20 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 1994-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 600 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 1994-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 180 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
600 J/kg
Mixed-layer CIN
-104 J/kg
Mixed-layer LCL
1060 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
180 m²/s²
0-3 km storm-relative helicity
291 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.9

Open this sounding in Storm Lab

The text

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

000 
WUUS1 KMSP 190737 RRA
SVRMSP
MNC053-190845-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
237 AM CDT TUE JUL 19 1994
 
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING     EFFECTIVE UNTIL  345 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN EAST CENTRAL MINNESOTA
 
   ...HENNEPIN COUNTY
 
AT 234 AM...A LINE OF SEVERE THUNDERSTORMS WAS APPROACHING WESTERN
HENNEPIN COUNTY NEAR THE TOWNS OF ROGERS...ROCKFORD AND MAPLE PLAIN.
THESE TOWNS ARE LOCATED 20 TO 25 MILES NORTHWEST OF DOWNTOWN MINNEPOLIS.
 
THE STORMS WERE MOVING SOUTHEAST AT 20 MILES AN HOUR TOWARD MAPLE
GROVE...PLYMOUTH...MOUND...AND WAYZATA. THESE STROMS WILL BE MOVING INTO
MINNEAPOLIS BY 330 AM.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND...LARGE HAIL...
DEADLY LIGHTNING...AND VERY HEAVY RAIN.  FOR YOUR PROTECTION
MOVE TO AN INTERIOR ROOM.  PEOPLE IN MOBILE HOMES SHOULD GO
TO A STORM SHELTER.
 
KRC/DRB

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 8:13 PM CDTSevere Thunderstorm WarningMPXStearns47 min
Jul 19, 1:31 AM CDTSevere Thunderstorm WarningMPXBenton, Sherburne, Stearns59 min
Jul 19, 1:57 AM CDTSevere Thunderstorm WarningMPXWright48 min
Jul 19, 2:26 AM CDTSevere Thunderstorm WarningMPXCarver, McLeod39 min
Jul 19, 3:49 PM CDTSevere Thunderstorm WarningMPXBrown, Nicollet41 min
Jul 19, 4:04 PM CDTTornado WarningMPXMille Lacs26 min
Jul 19, 4:15 PM CDTTornado WarningMPXBenton30 min
Jul 19, 4:39 PM CDTTornado WarningMPXAnoka, Chisago, Isanti51 min
Jul 19, 5:27 PM CDTSevere Thunderstorm WarningMPXCarver48 min
Jul 19, 5:31 PM CDTSevere Thunderstorm WarningMPXChisago44 min
Jul 19, 5:48 PM CDTSevere Thunderstorm WarningMPXHennepin42 min
Jul 19, 6:11 PM CDTSevere Thunderstorm WarningMPXChisago49 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1994Every severe thunderstorm warning in 1994

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.