Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 40, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 28, 1991, 10:20 PM CDT for Sibley County, Minnesota. It was in force for 40 min.
The area
The counties it named.
The facts
- Issued
- May 28, 1991, 10:20 PM CDT (03:20 UTC)
- Expired
- May 28, 1991, 11:00 PM CDT
- In force
- 40 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Sibley County, MN
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 3.3 hours before the alert went out and 58 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.
- Mixed-layer CAPE
- 674 J/kg
- Mixed-layer CIN
- -182 J/kg
- Mixed-layer LCL
- 903 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 244 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSP 290318 SVRMSP MNC143-290400- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MINNEAPOLIS MN 1020 PM CDT TUE MAY 28 1991 THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1100 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN CENTRAL MINNESOTA ...EASTERN SIBLEY COUNTY AT 1015PM WEATHER RADAR INDICATED SEVERE THUNDERSTORMS THROUGH MUCH OF EASTERN SIBLEY CLOUDY. THE STRONGEST THUNDERSTORM WAS JUST WEST OF GAYLORD OR 45 MILES WEST OF DOWNTOWN MINNEAPOLIS. THUNDERSTORMS ACROSS SIBLEY CLOUDY WERE MOVING EAST AT 30 MILES PER HOUR. SOME CITIES UNDER THE THREAT OF THESE SEVERE THUNDERSTORMS INCLUDE GREEN ISLE AND ARLINGTON AND HENDERSON. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS.
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.
In the hours before
Special weather statement, May 28, 6:22 PM CDT, 3 hours 58 minutes before
MNZ013-290030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 622 PM CDT TUE MAY 28 1991 ...TORNADO WATCH UNTIL 11 PM... AT 620 PM CDT THUNDERSTORMS WERE IN EAST CENTRAL SOUTH DAKOTA EAST OF HURON. THE STORMS WERE MOVING RAPIDLY TO THE EAST NORTHEAST AT 50 MPH. PEOPLE IN WEST CENTRAL MINNESOTA IN THE COUNTIES OF LAC QUI PARLE AND YELLOW MEDICINE SHOULD STAY ALERT TO THE POSSIBILTY OF SEVERE WEATHER ENTERING THE COUNTIES BY 7 PM CDT. SOME CITIES IN THE PATH OF THESE STORMS ARE CANBY...MARIETTA...MADISON ...DAWSON...AND ST LEO. KRUSE NNNN
Special weather statement, May 28, 8:14 PM CDT, 2 hours 6 minutes before
MNZ014-290215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 814 PM CDT TUE MAY 28 1991 ...A TORNADO WATCH CONTINUES IN EFFECT UNTIL 11 PM... AT 815 PM THUNDERSTORMS WITH HEAVY RAIN...POSSIBLE SMALL HAIL...AND FREQUENT LIGHTNING WERE LOCATED 20 MILES SOUTHWEST OF WILLMAR NEAR CLARA CITY. ALSO OTHER THUNDERSTORMS EXTENDED FROM LITCHFIELD IN MEEKER COUNTY TO BECKER IN SHERBURNE COUNTY. THESE STORMS WERE MOVING NORTHGEAST AT 40 MPH AND WILL BE IN THE CITIES OF ANNANDALE...MONTICELLO..AND BIG LAKE BY 845 PM. KRUSE NNNN
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 8:12 PM CDT | Severe Thunderstorm Warning | MPX | Redwood | 48 min |
| May 28, 8:26 PM CDT | Severe Thunderstorm Warning | MPX | Kandiyohi | 49 min |
| May 28, 8:28 PM CDT | Tornado Warning | MPX | Redwood | 32 min |
| May 28, 8:51 PM CDT | Severe Thunderstorm Warning | MPX | Redwood, Renville | 54 min |
| May 28, 8:54 PM CDT | Severe Thunderstorm Warning | MPX | Sherburne | 21 min |
| May 28, 8:59 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Isanti | 46 min |
| May 28, 9:02 PM CDT | Severe Thunderstorm Warning | MPX | Meeker | 43 min |
| May 28, 9:25 PM CDT | Severe Thunderstorm Warning | MPX | McLeod, Sibley, Wright | 50 min |
| May 28, 9:40 PM CDT | Severe Thunderstorm Warning | MPX | Chisago | 50 min |
| May 28, 10:02 PM CDT | Severe Thunderstorm Warning | MPX | Carver | 43 min |
| May 28, 10:10 PM CDT | Severe Thunderstorm Warning | MPX | Nicollet | 35 min |
| May 28, 10:10 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Brown | 30 min |
| May 28, 10:27 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Hennepin, Scott | 48 min |
| May 28, 10:48 PM CDT | Severe Thunderstorm Warning | MPX | Le Sueur | 27 min |
| May 28, 10:57 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Ramsey, Washington | 63 min |
| May 28, 10:57 PM CDT | Severe Thunderstorm Warning | MPX | Dakota | 63 min |
| May 28, 11:11 PM CDT | Severe Thunderstorm Warning | MPX | Rice | 49 min |
| May 28, 11:39 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue | 36 min |
| May 29, 1:22 AM CDT | Severe Thunderstorm Warning | MPX | Stearns | 53 min |
| May 29, 2:18 AM CDT | Severe Thunderstorm Warning | MPX | Morrison | 27 min |
| May 29, 3:25 AM CDT | Severe Thunderstorm Warning | MPX | Benton, Stearns | 35 min |
| May 29, 3:38 AM CDT | Severe Thunderstorm Warning | MPX | Morrison | 37 min |
| May 29, 3:53 AM CDT | Severe Thunderstorm Warning | MPX | Wright | 22 min |
| May 29, 3:58 AM CDT | Severe Thunderstorm Warning | MPX | Meeker, Stearns | 32 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1991Every severe thunderstorm warning in 1991
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.