Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 320, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 25, 1998, 10:59 PM CDT for Morrison County, Minnesota. It was in force for 61 min. 4 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
- Sep 25, 1998, 10:59 PM CDT (03:59 UTC)
- Expired
- Sep 26, 1998, 12:00 AM CDT
- In force
- 61 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Morrison County, MN
The radar
The Minneapolis radar (KMPX), 141 km from the middle of the area, began a volume at 04:03 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 |
|---|---|---|---|
| Sep 25, 11:15 PM CDT | Thunderstorm Wind 65 | Bowlus, MN | Farmstead buildings blown down. Mobile home destroyed. Estimated windspeed. |
| Sep 25, 11:39 PM CDT | Thunderstorm Wind 55 | Royalton, MN | Shed destroyed. Roof damage. Estimated windspeed. |
| Sep 25, 11:40 PM CDT | Hail 2 | Pierz, MN | Windows shattered and buildings pockmarked. Hail size estimated. |
| Sep 25, 11:48 PM CDT | Hail 1.75 | Morrill, 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 00:00Z, 4.0 hours before the alert went out and 139 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
- 1859 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 247 m²/s²
- 0-3 km storm-relative helicity
- 276 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
757
WUUS1 KMSP 260401 RRA
SVRMSP
MNC097-260500-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1059 PM CDT FRI SEP 25 1998
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES/CHANHASSEN HAS
ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
MORRISON COUNTY IN CENTRAL MINNESOTA
* UNTIL MIDNIGHT CDT
* AT 1057 PM CDT...DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
HAIL 8 MILES EAST OF LONG PRAIRIE OR ABOUT 30 MILES NORTHWEST OF
ST CLOUD. THE STORM WAS MOVING EAST AT 35 MPH.
* SOME LOCATIONS AFFECTED
FLENSBURG
SWANVILLE
LITTLE FALLS
GOLFBALL SIZE HAIL WAS REPORTED AT LONG PRAIRIE. THIS IS A
DANGEROUS STORM. STAY INDOORS AWAY FROM WINDOWS.
SCOTT
&The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 25, 10:20 PM CDT | Severe Thunderstorm Warning | MPX | Douglas, Todd | 65 min |
| Sep 25, 11:48 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Mille Lacs | 62 min |
| Sep 26, 12:12 AM CDT | Tornado Warning | MPX | Isanti, Kanabec | 33 min |
| Sep 26, 12:26 AM CDT | Severe Thunderstorm Warning | MPX | Chisago | 34 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.