Alert archive / Minnesota / Severe Thunderstorm Watches in 1997

Severe Thunderstorm Watch 512

June 23, 199721 counties in Minnesota; 8 counties in North Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 23, 1997, 11:15 PM CDT for 21 counties in Minnesota; 8 counties in North Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jun 23, 1997, 11:15 PM CDT (04:15 UTC)
Expired
Jun 24, 1997, 5:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 29 counties

Aitkin County, MN, Becker County, MN, Beltrami County, MN, Carlton County, MN, Cass County, MN, Clay County, MN, Clearwater County, MN, Crow Wing County, MN, Hubbard County, MN, Itasca County, MN, Koochiching County, MN, Lake County, MN, Mahnomen County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Saint Louis County, MN, Wadena County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Grand Forks County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Traill County, ND

Warnings issued inside it

4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 23, 11:34 PM CDTSevere Thunderstorm WarningFGFPolk26 min
Jun 24, 12:04 AM CDTSevere Thunderstorm WarningFGFPolk26 min
Jun 24, 12:30 AM CDTSevere Thunderstorm WarningFGFPolk30 min
Jun 24, 4:34 AM CDTFlash Flood WarningFGFClearwater, Polk3 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 4.3 hours before the alert went out and 186 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, International Fa, MN at 00:00Z on 1997-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 141 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, International Fa, MN at 00:00Z on 1997-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 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
141 J/kg
Mixed-layer CIN
-442 J/kg
Mixed-layer LCL
601 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
180 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 24, 1:45 PM CDTTornado WatchSPCHouston, Pine, Wabasha, Winona6 hr
Jun 24, 2:45 AM CDTSevere Thunderstorm WatchSPCBarnes, Dickey, Emmons, LaMoure, Logan, McIntosh and 1 more4 hr

Nearby

Severe Thunderstorm Watches in Minnesota, 1997Severe Thunderstorm Watches in North Dakota, 1997Every severe thunderstorm watch 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.