Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 315, NWS Twin Cities, MN

August 23, 1998Wright County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 23, 1998, 5:02 AM CDT for Wright County, Minnesota. It was in force for 43 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
Aug 23, 1998, 5:02 AM CDT (10:02 UTC)
Expired
Aug 23, 1998, 5:45 AM CDT
In force
43 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Wright County, MN

The radar

The Minneapolis radar (KMPX), 48 km from the middle of the area, began a volume at 10:04 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 10.0 hours before the alert went out and 46 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 1998-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2973 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 1998-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 255 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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.

184 
WUUS1 KMSP 231004 RRA
SVRMSP
MNC171-231045-

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

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

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

* UNTIL 545 AM CDT

* AT 500 AM CDT...DOPPLER RADAR INDICATED A SEVERE STORM WITH
  DAMAGING WINDS NEAR LITCHFIELD OR ABOUT 18 MILES NORTH OF
  HUTCHINSON.  THE STORM WAS MOVING EAST AT 50 MPH.

* SOME LOCATIONS AFFECTED
    BUFFALO
    MONTICELLO
    COKATO
    ROCKFORD
    KNAPP

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

MBK

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, 5 hours 40 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, 5 hours 40 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, 5 hours 12 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, 5 hours 12 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.

IssuedProductOfficeCountiesLasted
Aug 22, 7:30 PM CDTSevere Thunderstorm WarningMPXCarver, Hennepin65 min
Aug 22, 7:57 PM CDTSevere Thunderstorm WarningMPXDakota, Scott63 min
Aug 22, 8:10 PM CDTTornado WarningMPXDakota, Scott30 min
Aug 22, 8:35 PM CDTSevere Thunderstorm WarningMPXHennepin, Ramsey, Washington45 min
Aug 22, 8:35 PM CDTSevere Thunderstorm WarningMPXCarver45 min
Aug 22, 8:40 PM CDTTornado WarningMPXDakota65 min
Aug 22, 9:14 PM CDTFlash Flood WarningMPXCarver, Dakota, Hennepin, Scott2 hr
Aug 22, 9:19 PM CDTSevere Thunderstorm WarningMPXGoodhue51 min
Aug 22, 9:27 PM CDTSevere Thunderstorm WarningMPXDakota, Scott63 min
Aug 22, 9:51 PM CDTFlash Flood WarningMPXScott69 min
Aug 23, 3:15 AM CDTSevere Thunderstorm WarningMPXLac qui Parle45 min
Aug 23, 3:33 AM CDTSevere Thunderstorm WarningMPXChippewa, Swift42 min
Aug 23, 4:07 AM CDTSevere Thunderstorm WarningMPXKandiyohi58 min
Aug 23, 4:10 AM CDTSevere Thunderstorm WarningMPXYellow Medicine35 min
Aug 23, 4:14 AM CDTSevere Thunderstorm WarningMPXChippewa, Swift16 min
Aug 23, 4:40 AM CDTSevere Thunderstorm WarningMPXMeeker60 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.