Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 15, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 27, 1991, 3:43 PM CDT for Winona County, Minnesota. It was in force for 57 min. 1 report 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
- May 27, 1991, 3:43 PM CDT (20:43 UTC)
- Expired
- May 27, 1991, 4:40 PM CDT
- In force
- 57 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Winona County, MN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 27, 3:49 PM CDT | Hail 0.75 | Winona, MN |
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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 8.7 hours before the alert went out and 174 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1238 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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.
In the hours before
Local storm report, May 27, 3:18 PM CDT, 25 minutes before
STORM REPORT NATIONAL WEATHER SERVICE MINNEAPOLIS, MN 315 PM CDT MON MAY 27 1991 XCLNT WORK SELS.............HAIL (HALE) RPT....... WSO RST PUT OUT SVR WRNG FOR 1 INCH HAIL EAST OF CITY OF RST AT 308 PM.......... ELMWOOD, WI IN ERN PIERCE 1 INCH HAIL...... MSP.......................................OPERATIONS WAY TO GO, FORECASTERS..........
Special weather statement, May 27, 3:38 PM CDT, 5 minutes before
MNZ014-011-012-272145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 338 PM CDT MON MAY 27 1991 ...A LINE OF HEAVY THUNDERSTORMS IN CENTRAL MINNESOTA... AT 330 PM CDT A LINE OF THUNDERSTORMS WITH HEAVY RAIN...BRIEF GUSTY WINDS...POSSIBLE SMALL HAIL...AND LIGHTNING WAS IN CENTRAL MORRISON COUNTY. THE STORMS STRETCHED FROM UPSULA TO JUST EAST OF LITTLE FALLS TO MILLE LACS LAKE. THE THUNDERSTORMS WERE MOVING SLOWLY EAST AT 15 MPH. PERSONS IN SOUTHEASTERN MORRISON COUNTY SHOULD BE PREPARED TO SEEK SHELTER IF THREATENING WEATHER APPROACHES. KRUSE NNNN
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 12:29 AM CDT | Severe Thunderstorm Warning | MPX | Carver, Hennepin, Wright | 46 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.