Alert archive / Minnesota / Severe Thunderstorm Watches in 1997

Severe Thunderstorm Watch 601

July 13, 199733 counties in Minnesota; 10 counties in Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at Jul 13, 1997, 7:30 PM CDT for 33 counties in Minnesota; 10 counties in Wisconsin. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jul 13, 1997, 7:30 PM CDT (00:30 UTC)
Expired
Jul 14, 1997, 12:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 43 counties

Aitkin County, MN, Anoka County, MN, Benton County, MN, Carlton County, MN, Carver County, MN, Chisago County, MN, Crow Wing County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Itasca County, MN, Kanabec County, MN, Le Sueur County, MN, Mille Lacs County, MN, Mower County, MN, Olmsted County, MN, Pine County, MN, Ramsey County, MN, Rice County, MN, Saint Louis County, MN, Scott County, MN, Sherburne County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Winona County, MN, Wright County, MN, Barron County, WI, Buffalo County, WI, Burnett County, WI, Douglas County, WI, Dunn County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Saint Croix County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 89 km from the middle of the area, began a volume at 00:29 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 13, 7:34 PM CDTSevere Thunderstorm WarningDLHItasca56 min
Jul 13, 7:38 PM CDTSevere Thunderstorm WarningMPXScott52 min
Jul 13, 7:46 PM CDTTornado WarningMPXScott, Sibley29 min
Jul 13, 7:48 PM CDTSevere Thunderstorm WarningMPXDakota, Hennepin42 min
Jul 13, 7:48 PM CDTSevere Thunderstorm WarningMPXCarver42 min
Jul 13, 8:17 PM CDTSevere Thunderstorm WarningDLHAitkin58 min
Jul 13, 8:17 PM CDTSevere Thunderstorm WarningMPXAnoka, Ramsey, Washington58 min
Jul 13, 8:21 PM CDTSevere Thunderstorm WarningMPXRice, Steele, Waseca59 min
Jul 13, 8:21 PM CDTSevere Thunderstorm WarningMPXFreeborn59 min
Jul 13, 8:31 PM CDTSevere Thunderstorm WarningMPXDakota, Hennepin44 min
Jul 13, 8:55 PM CDTSevere Thunderstorm WarningARXDodge, Mower60 min
Jul 13, 8:55 PM CDTSevere Thunderstorm WarningMPXSaint Croix50 min
Jul 13, 9:11 PM CDTSevere Thunderstorm WarningMPXGoodhue49 min
Jul 13, 9:22 PM CDTSevere Thunderstorm WarningARXOlmsted, Wabasha63 min
Jul 13, 10:01 PM CDTSevere Thunderstorm WarningDLHBurnett, Washburn59 min
Jul 13, 10:35 PM CDTSevere Thunderstorm WarningMPXBarron35 min

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 0.5 hours before the alert went out and 284 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 1997-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 832 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 1997-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 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
832 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
1253 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
0 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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
Jul 13, 11:00 PM CDTSevere Thunderstorm WatchSPCAdams, Chippewa, Clark, Eau Claire, Jackson, Juneau and 16 more4 hr

Nearby

Severe Thunderstorm Watches in Minnesota, 1997Severe Thunderstorm Watches in Wisconsin, 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; radar from the NEXRAD Level II archive.