Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 284, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 20, 1998, 10:19 AM CDT for Redwood County, Minnesota. It was in force for 56 min. 5 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, 10:19 AM CDT (15:19 UTC)
- Expired
- Jul 20, 1998, 11:15 AM CDT
- In force
- 56 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Redwood County, MN
The radar
The Minneapolis radar (KMPX), 142 km from the middle of the area, began a volume at 15:20 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, 10:30 AM CDT | Hail 1.75 | Milroy, MN | Large swath of hail damage across southern Redwood county. |
| Jul 20, 10:49 AM CDT | Hail 0.75 | Lamberton, MN | |
| Jul 20, 10:55 AM CDT | Thunderstorm Wind 52 | Sanborn, MN | Roof ripped off bldg. Severe hail damage to areas across southern Redwood county. |
| Jul 20, 11:00 AM CDT | Thunderstorm Wind 65 | Clements, MN | Power lines down. Estimated windspeed. |
| Jul 20, 11:00 AM CDT | Thunderstorm Wind 65 | Clements, MN | Trees blown onto houses and vehicles. 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, 3.3 hours before the alert went out and 140 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.
000
TTAA00 KMSP 201519 RRA
SVRMSP
MNC127-201615-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1019 AM CDT MON JUL 20 1998
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES/CHANHASSEN HAS
ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN REDWOOD COUNTY IN SOUTHWESTERN MINNESOTA
* UNTIL 1115 AM CDT
* AT 1017 AM CDT...DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
HAIL 10 MILES SOUTH OF MARSHALL. THE STORM WAS MOVING EAST AT 35
MPH.
* SOME LOCATIONS AFFECTED
WALNUT GROVE
LAMBERTON
REVERE
SANBORN
THIS IS A DANGEROUS STORM. STAY INDOORS AWAY FROM WINDOWS.
WHThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 12:05 PM CDT | Severe Thunderstorm Warning | MPX | Le Sueur | 40 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.