Alert archive / Wisconsin / Tornado Watches in 1999

Tornado Watch 543

July 8, 199918 counties in Wisconsin

The Storm Prediction Center issued this tornado watch at Jul 8, 1999, 8:00 PM CDT for 18 counties in Wisconsin. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 8, 1999, 8:00 PM CDT (01:00 UTC)
Expired
Jul 9, 1999, 2:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center

Counties Adams County, WI, Brown County, WI, Calumet County, WI, Columbia County, WI, Dodge County, WI, Fond du Lac County, WI, Green Lake County, WI, Juneau County, WI, Kewaunee County, WI, Manitowoc County, WI, Marquette County, WI, Outagamie County, WI, Portage County, WI, Sauk County, WI, Shawano County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 8, 8:02 PM CDTSevere Thunderstorm WarningGRBWaupaca, Waushara48 min
Jul 8, 8:23 PM CDTSevere Thunderstorm WarningGRBOutagamie, Shawano, Winnebago62 min
Jul 8, 8:32 PM CDTSevere Thunderstorm WarningGRBBrown, Calumet, Oconto63 min
Jul 8, 9:24 PM CDTSevere Thunderstorm WarningMKXFond du Lac, Sheboygan66 min
Jul 8, 9:51 PM CDTSevere Thunderstorm WarningMKXSauk59 min
Jul 8, 10:24 PM CDTSevere Thunderstorm WarningMKXDodge, Fond du Lac, Washington61 min
Jul 8, 10:27 PM CDTSevere Thunderstorm WarningMKXColumbia, Dane58 min

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.0 hours before the alert went out and 100 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, Green Bay/Straub, WI at 00:00Z on 1999-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Green Bay/Straub, WI at 00:00Z on 1999-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 467 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
770 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
467 m²/s²
0-3 km storm-relative helicity
831 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

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
Jul 8, 10:45 PM CDTSevere Thunderstorm WatchSPCColumbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 14 more4 hr
Jul 9, 2:30 PM CDTSevere Thunderstorm WatchSPCAdams, Brown, Calumet, Chippewa, Clark, Forest and 20 more5 hr

Nearby

Tornado Watches in Wisconsin, 1999Every tornado watch in 1999

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.