Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 171, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 20, 1998, 9:31 AM CDT for Martin County, Minnesota. It was in force for 64 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 20, 1998, 9:31 AM CDT (14:31 UTC)
- Expired
- Jun 20, 1998, 10:35 AM CDT
- In force
- 64 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Martin County, MN
The radar
The Minneapolis radar (KMPX), 152 km from the middle of the area, began a volume at 14:31 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 20, 9:15 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 2.5 hours before the alert went out and 151 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
- 18 J/kg
- Mixed-layer CIN
- -384 J/kg
- Mixed-layer LCL
- 2049 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 416 m²/s²
- 0-3 km storm-relative helicity
- 589 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
872
WUUS1 KMSP 201433 RRA
SVRMSP
MNC091-201535-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
931 AM CDT SAT JUN 20 1998
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES/CHANHASSEN HAS
ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
MARTIN COUNTY IN SOUTH CENTRAL MINNESOTA
* UNTIL 1035 AM CDT
* AT 930 AM CDT...DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
HAIL NEAR TRIMONT OF 15 MILES NORTHWEST OF FAIRMONT. THE STORM
WAS MOVING NORTHEAST 25 MPH.
* SOME LOCATIONS AFFECTED
TRIMONT
FOX LAKE
WELCOM
SHERBURNE
THIS IS A DANGEROUS STORM...WITH LARGE HAIL. STAY INDOORS AWAY
FROM WINDOWS.
BAPWhat 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, Jun 20, 4:30 AM CDT, 5 hours 1 minute before
MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-202100- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 430 AM CDT SAT JUN 20 1998 ...SEVERE THUNDERSTORMS POSSIBLE OVER MUCH OF MINNESOTA TODAY... THE STORM PREDICTION CENTER HAS FORECAST A RISK OF SEVERE WEATHER OVER ALL OF CENTRAL AND SOUTHERN MINNESOTA TODAY...AND INTO WEST CENTRAL WISCONSIN LATER THIS AFTERNOON AND EVENING. COUNTERCLOCKWISE FLOW AROUND A STATIONARY LOW PRESSURE CENTER OVER SOUTHERN CANADA WILL HELP TO PUSH A COLD FRONT THROUGH MINNESOTA TODAY. SOUTHERLY WINDS AHEAD OF THE LOW WILL HELP TO DRAW AN INCREASINGLY WARM AND MOIST AIR MASS INTO THE GOPHER STATE. AS THE FRONT INTERACTS WITH THIS UNSTABLE AIR...THUNDERSTORMS ARE EXPECTED TO ERUPT...A FEW OF WHICH COULD BECOME SEVERE. THE STORMS SHOULD FIRST DEVELOP IN WESTERN MINNESOTA BY LATE MORNING OR EARLY AFTERNOON...THEN SPREAD INTO EASTERN MINNESOTA DURING THE AFTERNOON EVENTUALLY REACHING WEST CENTRAL WISCONSIN BY EVENING. THE AREA WITH THE HIGHEST THREAT FOR SEVERE WEATHER IS GENERALLY SOUTH OF A LINE FROM THE TWIN CITIES TO FAIRMONT. WHILE STRONG AND DAMAGING WINDS ARE EXPECTED TO BE THE MAIN THREAT FROM THE STORMS... A FEW TORNADOES WILL ALSO BE POSSIBLE. STORM SPOTTERS AND EMERGENCY MANAGERS SHOULD BE PREPARED FOR ACTIVATION TODAY. JUSKIE
Special weather statement, Jun 20, 4:30 AM CDT, 5 hours 1 minute before
MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-202100- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 430 AM CDT SAT JUN 20 1998 ...SEVERE THUNDERSTORMS POSSIBLE OVER MUCH OF MINNESOTA TODAY... THE STORM PREDICTION CENTER HAS FORECAST A RISK OF SEVERE WEATHER OVER ALL OF CENTRAL AND SOUTHERN MINNESOTA TODAY...AND INTO WEST CENTRAL WISCONSIN LATER THIS AFTERNOON AND EVENING. COUNTERCLOCKWISE FLOW AROUND A STATIONARY LOW PRESSURE CENTER OVER SOUTHERN CANADA WILL HELP TO PUSH A COLD FRONT THROUGH MINNESOTA TODAY. SOUTHERLY WINDS AHEAD OF THE LOW WILL HELP TO DRAW AN INCREASINGLY WARM AND MOIST AIR MASS INTO THE GOPHER STATE. AS THE FRONT INTERACTS WITH THIS UNSTABLE AIR...THUNDERSTORMS ARE EXPECTED TO ERUPT...A FEW OF WHICH COULD BECOME SEVERE. THE STORMS SHOULD FIRST DEVELOP IN WESTERN MINNESOTA BY LATE MORNING OR EARLY AFTERNOON...THEN SPREAD INTO EASTERN MINNESOTA DURING THE AFTERNOON EVENTUALLY REACHING WEST CENTRAL WISCONSIN BY EVENING. THE AREA WITH THE HIGHEST THREAT FOR SEVERE WEATHER IS GENERALLY SOUTH OF A LINE FROM THE TWIN CITIES TO FAIRMONT. WHILE STRONG AND DAMAGING WINDS ARE EXPECTED TO BE THE MAIN THREAT FROM THE STORMS... A FEW TORNADOES WILL ALSO BE POSSIBLE. STORM SPOTTERS AND EMERGENCY MANAGERS SHOULD BE PREPARED FOR ACTIVATION TODAY. JUSKIE
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 8:34 AM CDT | Severe Thunderstorm Warning | MPX | Martin | 61 min |
| Jun 20, 8:40 AM CDT | Severe Thunderstorm Warning | MPX | Brown, Watonwan | 65 min |
| Jun 20, 9:14 AM CDT | Severe Thunderstorm Warning | MPX | Nicollet, Sibley | 61 min |
| Jun 20, 9:35 AM CDT | Severe Thunderstorm Warning | MPX | Scott | 40 min |
| Jun 20, 9:54 AM CDT | Severe Thunderstorm Warning | MPX | Watonwan | 36 min |
| Jun 20, 10:25 AM CDT | Severe Thunderstorm Warning | MPX | Watonwan | 35 min |
| Jun 20, 11:19 AM CDT | Severe Thunderstorm Warning | MPX | Faribault, Martin | 46 min |
| Jun 20, 12:00 PM CDT | Severe Thunderstorm Warning | MPX | Faribault | 65 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1998Every severe thunderstorm warning in 1998
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; radar from the NEXRAD Level II archive.