Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 167, NWS Twin Cities, MN

July 25, 1997Redwood County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 25, 1997, 2:07 AM CDT for Redwood County, Minnesota. It was in force for 48 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
Jul 25, 1997, 2:07 AM CDT (07:07 UTC)
Expired
Jul 25, 1997, 2:55 AM CDT
In force
48 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Redwood County, MN

The radar

The Minneapolis radar (KMPX), 142 km from the middle of the area, began a volume at 07:10 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

TimeReportWhereRemark
Jul 25, 2:15 AM CDTThunderstorm Wind 50Milroy, MNGrain bin rolled over. 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.

IssuedProductOfficeLasted
Jul 24, 10:00 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 7.1 hours before the alert went out and 140 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 1997-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 870 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 1997-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.1939Sfc1 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
870 J/kg
Mixed-layer CIN
-71 J/kg
Mixed-layer LCL
783 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
92 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 250708 RRA
SVRMSP
MNC127-250755-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
207 AM CDT FRI JUL 25 1997

* SEVERE THUNDERSTORM WARNING FOR
  EASTERN REDWOOD COUNTY - SOUTHWESTERN MINNESOTA

* UNTIL 255 AM CDT
 
* SOME LOCATIONS AFFECTED
    REDWOOD FALLS
    MORGAN
    CLEMENTS
    WABASSO

* AT 205 AM CDT DOPPLER RADAR INDICATED A SEVERE STORM WITH
  DAMAGING WINDS 20 MILES SOUTHWEST OF REDWOOD FALLS...BETWEEN
  LUCAN AND SEAFORTH.  THE STORM WAS MOVING EAST AT 35 MPH.

  A GRAIN BIN WAS ROLLED OVER IN MILROY...AS OF 200 AM.

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


TDK
 

&

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 1:01 AM CDTSevere Thunderstorm WarningMPXYellow Medicine49 min
Jul 25, 1:33 AM CDTTornado WarningMPXYellow Medicine32 min
Jul 25, 2:04 AM CDTSevere Thunderstorm WarningMPXRenville46 min
Jul 25, 2:23 AM CDTTornado WarningMPXRenville32 min
Jul 25, 2:26 AM CDTFlash Flood WarningMPXBlue Earth, Faribault, Freeborn, Le Sueur, Steele, Waseca4 hr
Jul 25, 2:26 AM CDTFlash Flood WarningMPXBrown, Nicollet, Redwood, Renville, Sibley4 hr
Jul 25, 2:26 AM CDTFlash Flood WarningMPXMartin, Watonwan4 hr
Jul 25, 2:28 AM CDTSevere Thunderstorm WarningMPXMcLeod, Sibley62 min
Jul 25, 2:34 AM CDTSevere Thunderstorm WarningMPXBrown, Nicollet61 min
Jul 25, 2:56 AM CDTTornado WarningMPXMcLeod34 min
Jul 25, 3:03 AM CDTSevere Thunderstorm WarningMPXCarver, Scott47 min
Jul 25, 3:16 AM CDTSevere Thunderstorm WarningMPXLe Sueur44 min
Jul 25, 3:49 AM CDTSevere Thunderstorm WarningMPXRice46 min
Jul 25, 4:15 AM CDTFlash Flood WarningMPXDakota, Goodhue, Rice, Scott4 hr

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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.