Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 287, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 20, 1998, 12:05 PM CDT for Le Sueur County, Minnesota. It was in force for 40 min. 2 reports 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
- Jul 20, 1998, 12:05 PM CDT (17:05 UTC)
- Expired
- Jul 20, 1998, 12:45 PM CDT
- In force
- 40 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Le Sueur County, MN
The radar
The Minneapolis radar (KMPX), 55 km from the middle of the area, began a volume at 17:09 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 |
|---|---|---|---|
| Jul 20, 12:30 PM CDT | Thunderstorm Wind 65 | Cleveland, MN | Trees and power lines down. |
| Jul 20, 12:30 PM CDT | Thunderstorm Wind 65 | Kasota, MN | Trees and power lines down. Estimated windspeed. |
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, 5.1 hours before the alert went out and 54 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
- 2372 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
028
WUUS1 KMSP 201706 RRA
SVRMSP
MNC079-201745-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1205 PM CDT MON JUL 20 1998
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES/CHANHASSEN HAS
ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA
* UNTIL 1245 PM CDT
* AT 1205 PM CDT...DOPPLER RADAR INDICATED A SEVERE STORM WITH
DAMAGING WINDS BETWEEN ST. PETER AND MANKATO. THE STORM WAS
MOVING EAST 35 MPH. WIND DAMAGE HAS BEEN REPORTED IN NEW ULM.
* SOME LOCATIONS AFFECTED
LE CENTER
MARYSVILLE
WATERVILLE
CLEVELAND
THIS IS A DANGEROUS STORM...WITH DAMAGING WINDS. STAY INDOORS
AWAY FROM WINDOWS.
EDWARDS
&The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 10:19 AM CDT | Severe Thunderstorm Warning | MPX | Redwood | 56 min |
| Jul 20, 10:51 AM CDT | Severe Thunderstorm Warning | MPX | Brown | 64 min |
| Jul 20, 11:35 AM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Nicollet | 60 min |
| Jul 20, 11:43 AM CDT | Tornado Warning | MPX | Nicollet | 32 min |
| Jul 20, 12:22 PM CDT | Severe Thunderstorm Warning | MPX | Rice | 63 min |
| Jul 20, 12:51 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue | 64 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.