Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 311, NWS Twin Cities, MN

August 23, 1998Kandiyohi County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 23, 1998, 4:07 AM CDT for Kandiyohi County, Minnesota. It was in force for 58 min. 1 report 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: Aug 23, 1998, 4:07 AM CDT (09:07 UTC)
Expired: Aug 23, 1998, 5:05 AM CDT
In force: 58 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Kandiyohi County, MN

What was reported inside it

Time	Report	Where	Remark
Aug 23, 4:40 AM CDT	Thunderstorm Wind 55	Willmar, MN	Trees and power lines 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 9.1 hours before the alert went out and 115 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: 2973 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 823 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 255 m²/s²
0-3 km storm-relative helicity: 351 m²/s²
Significant tornado parameter: 4.3
Supercell composite: 21.4

Open this sounding in Storm Lab

The text

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

895 
WUUS1 KMSP 230909 RRA
SVRMSP
MNC067-231005-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
407 AM CDT SUN AUG 23 1998

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

* SEVERE THUNDERSTORM WARNING FOR...
  KANDIYOHI COUNTY IN CENTRAL MINNESOTA

* UNTIL 505 AM CDT

* AT 405 AM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE STORMS 20
  MILES NORTHWEST OF MONTEVIDEO TO MONTEVIDEO.  THE STORMS WERE
  MOVING EAST AT 50 MPH.

* SOME LOCATIONS AFFECTED
    WILLMAR
    PENNOCK
    SPICER
    SUNBERG
    ATWATER

THESE ARE DANGEROUS STORMS WITH A HISTORY OF PRODUCING WIND GUSTS
TO NEAR 70 MPH.  STAY INDOORS AWAY FROM WINDOWS.

JJ

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Aug 22, 11:22 PM CDT, 4 hours 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MINNESOTA
1122 PM CDT SAT AUG 22 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0753 PM    CHANHASSEN                MN   .75 INCH HAIL
08/22/98   CARVER

0808 PM    SAVAGE                    MN   TORNADO
08/22/98   SCOTT

0815 PM    SAVAGE                    MN   60 MPH TSTM GUST
08/22/98   SCOTT

0825 PM    BLOOMINGTON               MN   WIND DAMAGE
08/22/98   HENNEPIN                       8 INCH BRANCHES DOWN

0922 PM    SHAKOPEE                  MN   1 INCH HAIL
08/22/98   SCOTT

0922 PM    SHAKOPEE                  MN   60 MPH TSTM GUST
08/22/98   SCOTT
 RJN

Local storm report, Aug 22, 11:22 PM CDT, 4 hours 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MINNESOTA
1122 PM CDT SAT AUG 22 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0753 PM    CHANHASSEN                MN   .75 INCH HAIL
08/22/98   CARVER

0808 PM    SAVAGE                    MN   TORNADO
08/22/98   SCOTT

0815 PM    SAVAGE                    MN   60 MPH TSTM GUST
08/22/98   SCOTT

0825 PM    BLOOMINGTON               MN   WIND DAMAGE
08/22/98   HENNEPIN                       8 INCH BRANCHES DOWN

0922 PM    SHAKOPEE                  MN   1 INCH HAIL
08/22/98   SCOTT

0922 PM    SHAKOPEE                  MN   60 MPH TSTM GUST
08/22/98   SCOTT
 RJN

Special weather statement, Aug 22, 11:50 PM CDT, 4 hours 17 minutes before

MNZ049>053-058>063-066>070-074>079-082>088-091>096-230700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1150 PM CDT SAT AUG 22 1998

THE TORNADO WATCH THAT WAS IN EFFECT UNTIL 1 AM FOR SOUTHEAST MINNESOTA
HAS BEEN CANCELLED.  SCATTERED SHOWERS AND THUNDERSTORM WILL CONTINUE
OVER PARTS OF SOUTHEAST AND EAST CENTRAL MINNESOTA UNTIL AFTER
MIDNIGHT.  HOWEVER STORMS ARE NO LONGER EXPECTED TO BE SEVERE.

SCOTT

Special weather statement, Aug 22, 11:50 PM CDT, 4 hours 17 minutes before

MNZ049>053-058>063-066>070-074>079-082>088-091>096-230700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1150 PM CDT SAT AUG 22 1998

THE TORNADO WATCH THAT WAS IN EFFECT UNTIL 1 AM FOR SOUTHEAST MINNESOTA
HAS BEEN CANCELLED.  SCATTERED SHOWERS AND THUNDERSTORM WILL CONTINUE
OVER PARTS OF SOUTHEAST AND EAST CENTRAL MINNESOTA UNTIL AFTER
MIDNIGHT.  HOWEVER STORMS ARE NO LONGER EXPECTED TO BE SEVERE.

SCOTT

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 22, 7:30 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin	65 min
Aug 22, 7:57 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Scott	63 min
Aug 22, 8:10 PM CDT	Tornado Warning	MPX	Dakota, Scott	30 min
Aug 22, 8:35 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin, Ramsey, Washington	45 min
Aug 22, 8:35 PM CDT	Severe Thunderstorm Warning	MPX	Carver	45 min
Aug 22, 8:40 PM CDT	Tornado Warning	MPX	Dakota	65 min
Aug 22, 9:14 PM CDT	Flash Flood Warning	MPX	Carver, Dakota, Hennepin, Scott	2 hr
Aug 22, 9:19 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	51 min
Aug 22, 9:27 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Scott	63 min
Aug 22, 9:51 PM CDT	Flash Flood Warning	MPX	Scott	69 min
Aug 23, 3:15 AM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle	45 min
Aug 23, 3:33 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Swift	42 min
Aug 23, 4:10 AM CDT	Severe Thunderstorm Warning	MPX	Yellow Medicine	35 min
Aug 23, 4:14 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Swift	16 min
Aug 23, 4:40 AM CDT	Severe Thunderstorm Warning	MPX	Meeker	60 min
Aug 23, 5:02 AM CDT	Severe Thunderstorm Warning	MPX	Wright	43 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.