Alert archive / Minnesota / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 666

August 9, 20018 counties in Minnesota; 6 counties in Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at Aug 9, 2001, 12:00 AM CDT for 8 counties in Minnesota; 6 counties in Wisconsin. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Aug 9, 2001, 12:00 AM CDT (05:00 UTC)
Expired
Aug 9, 2001, 4:00 AM CDT
In force
4 hr
Issued by
the Storm Prediction Center

Counties Aitkin County, MN, Carlton County, MN, Cook County, MN, Kanabec County, MN, Lake County, MN, Mille Lacs County, MN, Morrison County, MN, Pine County, MN, Ashland County, WI, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Sawyer County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 22 km from the middle of the area, began a volume at 05:00 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

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

IssuedProductOfficeCountiesLasted
Aug 9, 12:07 AM CDTSevere Thunderstorm WarningDLHCarlton, Saint Louis68 min

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 5.0 hours before the alert went out and 231 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 2001-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1405 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 2001-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.1939587897117136156175Sfc1 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
1405 J/kg
Mixed-layer CIN
-81 J/kg
Mixed-layer LCL
1530 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
-17 m²/s²
Significant tornado parameter
0.1
Supercell composite
3.8

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, 9:45 PM CDTSevere Thunderstorm WatchSPCAitkin, Becker, Beltrami, Cass, Clay, Clearwater and 11 more4 hr
Aug 9, 12:45 PM CDTSevere Thunderstorm WatchSPCBrown, Door, Kewaunee, Manitowoc, Oconto, Outagamie7 hr
Aug 9, 4:30 PM CDTSevere Thunderstorm WatchSPCColumbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 11 more5 hr

Nearby

Severe Thunderstorm Watches in Minnesota, 2001Severe Thunderstorm Watches in Wisconsin, 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.