Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 174, NWS Twin Cities, MN

June 20, 1998Watonwan County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 20, 1998, 10:25 AM CDT for Watonwan County, Minnesota. It was in force for 35 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, 10:25 AM CDT (15:25 UTC)
Expired: Jun 20, 1998, 11:00 AM CDT
In force: 35 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Watonwan County, MN

The radar

The Minneapolis radar (KMPX), 128 km from the middle of the area, began a volume at 15:28 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, 3.4 hours before the alert went out and 126 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

168 
WUUS1 KMSP 201526 RRA
SVRMSP
MNC165-201600-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1025 AM CDT SAT JUN 20 1998

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES/CHANHASSEN HAS
ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WATONWAN COUNTY IN SOUTH CENTRAL MINNESOTA

* UNTIL 1100 AM CDT

* AT 1025 AM CDT...DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL NEAR SOUTH BRANCH OR 10 MILES SOUTH OF ST JAMES.  THE STORM
  WAS MOVING NORTHEAST 30 MPH. THREE QUARTER INCH HAIL WAS REPORTED
  AT SOUTH BRANCH AT 1020 AM.

* SOME LOCATIONS AFFECTED
    ST JAMES
    LEWISVILLE
    ODIN
    BUTTERFIELD

THIS IS A DANGEROUS STORM...WITH LARGE HAIL.  STAY INDOORS AWAY
FROM WINDOWS.


BAP


&

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, 9:31 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, 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, 1998 Every 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.