Alert archive / Wisconsin / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 663

August 8, 20016 counties in Minnesota; 7 counties in Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at Aug 8, 2001, 4:00 PM CDT for 6 counties in Minnesota; 7 counties in Wisconsin. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Aug 8, 2001, 4:00 PM CDT (21:00 UTC)
Expired
Aug 8, 2001, 10:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center

Counties Aitkin County, MN, Carlton County, MN, Cass County, MN, Crow Wing County, MN, Kanabec County, MN, Pine County, MN, Ashland County, WI, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Price County, WI, Sawyer County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 58 km from the middle of the area, began a volume at 21:00 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

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

IssuedProductOfficeCountiesLasted
Aug 8, 4:16 PM CDTSevere Thunderstorm WarningDLHAitkin44 min
Aug 8, 4:25 PM CDTSevere Thunderstorm WarningDLHCass, Crow Wing35 min
Aug 8, 5:00 PM CDTSevere Thunderstorm WarningDLHCarlton60 min
Aug 8, 5:00 PM CDTSevere Thunderstorm WarningDLHAitkin, Saint Louis60 min

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 9.0 hours before the alert went out and 204 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 12:00Z on 2001-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 389 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 12:00Z on 2001-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 130 square meters per square second.1939587897Sfc1 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
389 J/kg
Mixed-layer CIN
-148 J/kg
Mixed-layer LCL
1452 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
130 m²/s²
0-3 km storm-relative helicity
141 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.0

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
Aug 8, 1:00 AM CDTSevere Thunderstorm WatchSPCBecker, Cass, Clay, Crow Wing, Hubbard, Mahnomen and 7 more5 hr
Aug 8, 4:30 AM CDTSevere Thunderstorm WatchSPCAitkin, Carlton, Lake, Saint Louis6 hr
Aug 8, 6:00 PM CDTTornado WatchSPCBecker, Clay, Kittson, Mahnomen, Marshall, Norman and 4 more5 hr
Aug 8, 8:45 AM CDTSevere Thunderstorm WatchSPCFlorence4 hr

Nearby

Severe Thunderstorm Watches in Wisconsin, 2001Severe Thunderstorm Watches in Minnesota, 2001Every severe thunderstorm watch in 2001

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.