Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 168, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 20, 1998, 8:34 AM CDT for Martin County, Minnesota. It was in force for 61 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
- Jun 20, 1998, 8:34 AM CDT (13:34 UTC)
- Expired
- Jun 20, 1998, 9:35 AM CDT
- In force
- 61 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 13:35 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 20, 9:28 AM CDT | Hail 0.75 | Trimont, 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.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 1.6 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.
000
TTAA00 KMSP 201336 RRA
SVRMSP
MNC091-201435-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
834 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 935 AM CDT
* AT 835 AM CDT...DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
HAIL JUST EAST OF WORTHINGTON OR ABOUT .40 MILES WEST OF FAIRMONT.
THE STORM WAS MOVING EAST AT 40 MPH.
* SOME LOCATIONS AFFECTED
SHERBURNE
DUNNELL
CEYLON
FAIRMONT
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, 4 hours 4 minutes 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, 4 hours 4 minutes 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, 8:40 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, 9:31 AM CDT | Severe Thunderstorm Warning | MPX | Martin | 64 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.