Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 175, NWS Twin Cities, MN

June 20, 1998Faribault County, Martin County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 20, 1998, 11:19 AM CDT for Faribault County, Martin County, Minnesota. It was in force for 46 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: Jun 20, 1998, 11:19 AM CDT (16:19 UTC)
Expired: Jun 20, 1998, 12:05 PM CDT
In force: 46 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Faribault County, MN, Martin County, MN

The radar

The Minneapolis radar (KMPX), 142 km from the middle of the area, began a volume at 16:19 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, 11:30 AM CDT	Hail 1.75	Winnebago, MN
Jun 20, 12:14 PM CDT	Thunderstorm Wind 50	Wells, MN	Large tree limbs blown 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 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, 4.3 hours before the alert went out and 141 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.

484 
WUUS1 KMSP 201620 RRA
SVRMSP
MNC043-091-201705-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1119 AM CDT SAT JUN 20 1998

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

* SEVERE THUNDERSTORM WARNING FOR...
  FARIBAULT COUNTY IN SOUTH CENTRAL MINNESOTA
  EASTERN MARTIN COUNTY IN SOUTH CENTRAL MINNESOTA

* UNTIL 1205 PM CDT

* AT 1118AM CDT...DOPPLER RADAR INDICATED A SEVERE STORM WITH
LARGE HAIL NORTH OF FAIRMONT.  THE STORM WAS MOVING EAST 30 MPH.

* SOME LOCATIONS AFFECTED
    IMOGENE
    FAIRMONT
    BLUE EARTH
    WINNEBAGO

DAMAGING WINDS AND LARGE HAIL ARE LIKELY.  GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS.


CME

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, 10:25 AM CDT	Severe Thunderstorm Warning	MPX	Watonwan	35 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.