Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 145, NWS Twin Cities, MN

July 17, 1997Kandiyohi County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 17, 1997, 12:40 AM CDT for Kandiyohi County, Minnesota. It was in force for 65 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
Jul 17, 1997, 12:40 AM CDT (05:40 UTC)
Expired
Jul 17, 1997, 1:45 AM CDT
In force
65 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Kandiyohi County, MN

The radar

The Minneapolis radar (KMPX), 118 km from the middle of the area, began a volume at 05:41 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.

IssuedProductOfficeLasted
Jul 17, 12:00 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 5.7 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 1997-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2132 joules per kilogram.LCLLFCEL10008507005003002001001 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 1997-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 square meters per square second.193958Sfc1 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
2132 J/kg
Mixed-layer CIN
-110 J/kg
Mixed-layer LCL
1981 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
127 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

409 
WUUS1 KMSP 170543 RRA
SVRMSP
MNC067-170645-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1240 AM CDT THU JUL 17 1997

* SEVERE THUNDERSTORM WARNING FOR
  KANDIYOHI COUNTY - CENTRAL MINNESOTA

* UNTIL 145 AM CDT
 
* SOME LOCATIONS AFFECTED
    WILLMAR
    KANDIYOHI
    ATWATER
    SPICER

* AT 1240 AM CDT DOPPLER RADAR INDICATED SEVERE STORMS OVER
  WILLMAR...TO 6 MILES NORTHEAST OF WILLMAR...NEAR EAGLE LAKE.  THE
  STORMS WERE MOVING SLOWLY SOUTHEAST AT 5 MPH.

  ONE-HALF INCH HAIL AS REPORTED IN WILLMAR AT 1240 AM.  LARGER
  HAIL IS EXPECTED IN WILLMAR...ACCORDING TO RADAR.

THESE ARE DANGEROUS STORMS.  STAY INDOORS AWAY FROM WINDOWS.


TDK
 

&

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

Special weather statement, Jul 16, 6:42 PM CDT, 5 hours 58 minutes before
WIZ014>016-025-027-028-170030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHANHASSEN/TWIN CITIES MN
635 PM CDT WED JUL 16 1997

SEVERE THUNDERSTORM WATCH NUMBER 612 HAS BEEN CANCELLED FOR WEST
CE>NTRAL WISCONSIN.  THUNDERSTORMS MAY AGAIN DEVELOP LATER TONIGHT
ACROSS THE REGION.
Special weather statement, Jul 16, 7:20 PM CDT, 5 hours 20 minutes before
MNZ074>078-082>085-091>093-170130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHANHASSEN/TWIN CITIES MN
720 PM CDT WED JUL 16 1997

...TORNADO WATCH CANCELLED FOR SOUTH CENTRAL MINNESOTA...

TORNADO WATCH NUMBER 614 HAS BEEN CANCELLED FOR A PORTION OF SOUTH
CENTRAL MINNESOTA.  THUNDERSTORMS MAY DEVELOP LATER TONIGHT...SOME
OF WHICH COULD BE SEVERE.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 10:52 PM CDTSevere Thunderstorm WarningMPXStevens53 min
Jul 16, 11:07 PM CDTSevere Thunderstorm WarningMPXDakota53 min
Jul 16, 11:13 PM CDTSevere Thunderstorm WarningMPXSwift62 min
Jul 16, 11:47 PM CDTSevere Thunderstorm WarningMPXKandiyohi58 min
Jul 16, 11:58 PM CDTSevere Thunderstorm WarningMPXDakota62 min
Jul 17, 12:08 AM CDTSevere Thunderstorm WarningMPXChippewa, Swift52 min
Jul 17, 12:17 AM CDTSevere Thunderstorm WarningMPXLac qui Parle58 min
Jul 17, 12:33 AM CDTSevere Thunderstorm WarningMPXCarver, Wright57 min
Jul 17, 12:55 AM CDTSevere Thunderstorm WarningMPXDakota, Goodhue65 min
Jul 17, 12:55 AM CDTSevere Thunderstorm WarningMPXWashington65 min
Jul 17, 12:55 AM CDTSevere Thunderstorm WarningMPXHennepin65 min
Jul 17, 1:00 AM CDTSevere Thunderstorm WarningMPXRedwood, Renville, Yellow Medicine60 min
Jul 17, 1:12 AM CDTSevere Thunderstorm WarningMPXMeeker48 min
Jul 17, 1:29 AM CDTSevere Thunderstorm WarningMPXMcLeod, Sibley61 min
Jul 17, 1:41 AM CDTSevere Thunderstorm WarningMPXWright49 min
Jul 17, 1:51 AM CDTSevere Thunderstorm WarningMPXCarver54 min
Jul 17, 1:58 AM CDTSevere Thunderstorm WarningMPXDakota, Hennepin, Scott62 min
Jul 17, 2:26 AM CDTFlash Flood WarningMPXDakota, Hennepin, Ramsey3 hr
Jul 17, 2:34 AM CDTSevere Thunderstorm WarningMPXAnoka, Ramsey, Washington56 min
Jul 17, 2:55 AM CDTSevere Thunderstorm WarningMPXDakota, Goodhue65 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1997Every severe thunderstorm warning in 1997

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.