Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 288, NWS Twin Cities, MN

July 20, 1998Rice County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 20, 1998, 12:22 PM CDT for Rice County, Minnesota. It was in force for 63 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, 12:22 PM CDT (17:22 UTC)
Expired: Jul 20, 1998, 1:25 PM CDT
In force: 63 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Rice County, MN

The radar

The Minneapolis radar (KMPX), 59 km from the middle of the area, began a volume at 17:24 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, 12:25 PM CDT	Thunderstorm Wind 55	Morristown, MN
Jul 20, 12:38 PM CDT	Thunderstorm Wind 52	Faribault, MN	Trees down across county per sheriffs department.

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, 5.4 hours before the alert went out and 60 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: 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

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 201722 RRA
SVRMSP
MNC131-201825-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1222 PM CDT MON JUL 20 1998

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

* SEVERE THUNDERSTORM WARNING FOR...
  RICE COUNTY IN EAST CENTRAL MINNESOTA

* UNTIL 125 PM CDT

* AT 1220 PM CDT...DOPPLER RADAR INDICATED A SEVERE STORM WITH
  DAMAGING WINDS NEAR KILKENNY OR ABOUT 23 MILES NORTHEAST OF
  MANKATO.  THE STORM WAS MOVING EAST AT 40 MPH.

* SOME LOCATIONS AFFECTED
    SHIELDSVILLE
    WARSAW
    FARIBAULT
    MORRISTOWN

THIS IS A DANGEROUS STORM...WITH DAMAGING WINDS.  STAY INDOORS
AWAY FROM WINDOWS.

JJ

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, 12:05 PM CDT	Severe Thunderstorm Warning	MPX	Le Sueur	40 min
Jul 20, 12:51 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	64 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.