Alert archive / Wisconsin / Severe Thunderstorm Watches in 2007

Severe Thunderstorm Watch 428

June 20, 200711 counties in Michigan; 44 counties in Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at Jun 20, 2007, 3:10 PM EDT for 11 counties in Michigan; 44 counties in Wisconsin. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Jun 20, 2007, 3:10 PM EDT (19:10 UTC)
Expired
Jun 20, 2007, 11:00 PM EDT
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 55 counties

Alger County, MI, Baraga County, MI, Delta County, MI, Dickinson County, MI, Gogebic County, MI, Iron County, MI, Luce County, MI, Marquette County, MI, Menominee County, MI, Ontonagon County, MI, Schoolcraft County, MI, Ashland County, WI, Barron County, WI, Bayfield County, WI, Brown County, WI, Buffalo County, WI, Burnett County, WI, Calumet County, WI, Chippewa County, WI, Clark County, WI, Door County, WI, Douglas County, WI, Dunn County, WI, Eau Claire County, WI, Florence County, WI, Forest County, WI, Iron County, WI, Jackson County, WI, Kewaunee County, WI, Langlade County, WI, Lincoln County, WI, Manitowoc County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Outagamie County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Portage County, WI, Price County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Shawano County, WI, Taylor County, WI, Trempealeau County, WI, Vilas County, WI, Washburn County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI

The radar

The Green Bay radar (KGRB), 189 km from the middle of the area, began a volume at 19:13 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
20%
One or more EF2 to EF5 tornadoes
5%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
50%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 20, 3:22 PM EDTTornado WarningMQTAlger38 min
Jun 20, 3:41 PM EDTSevere Thunderstorm WarningDLHSawyer34 min
Jun 20, 3:47 PM EDTSevere Thunderstorm WarningMQTGogebic, Iron43 min
Jun 20, 3:50 PM EDTSevere Thunderstorm WarningDLHPrice40 min
Jun 20, 3:52 PM EDTSevere Thunderstorm WarningMQTAlger, Marquette38 min
Jun 20, 3:52 PM EDTSevere Thunderstorm WarningDLHWashburn23 min
Jun 20, 3:53 PM EDTSevere Thunderstorm WarningGRBLincoln, Oneida52 min
Jun 20, 3:54 PM EDTSevere Thunderstorm WarningGRBForest, Vilas66 min
Jun 20, 4:04 PM EDTSevere Thunderstorm WarningDLHSawyer56 min
Jun 20, 4:05 PM EDTSevere Thunderstorm WarningMQTDickinson, Menominee40 min
Jun 20, 4:25 PM EDTSevere Thunderstorm WarningGRBFlorence, Marinette55 min
Jun 20, 4:39 PM EDTSevere Thunderstorm WarningMQTDelta66 min
Jun 20, 4:40 PM EDTSevere Thunderstorm WarningDLHPrice50 min
Jun 20, 4:40 PM EDTSevere Thunderstorm WarningGRBOneida20 min
Jun 20, 4:45 PM EDTSevere Thunderstorm WarningGRBLincoln45 min
Jun 20, 4:45 PM EDTSevere Thunderstorm WarningMPXRusk45 min
Jun 20, 4:49 PM EDTSevere Thunderstorm WarningARXTaylor71 min
Jun 20, 5:00 PM EDTSevere Thunderstorm WarningGRBForest45 min
Jun 20, 5:03 PM EDTSevere Thunderstorm WarningGRBLanglade42 min
Jun 20, 5:20 PM EDTSevere Thunderstorm WarningGRBMarathon55 min
Jun 20, 5:29 PM EDTSevere Thunderstorm WarningDLHPrice16 min
Jun 20, 5:36 PM EDTSevere Thunderstorm WarningMQTMenominee39 min
Jun 20, 5:37 PM EDTSevere Thunderstorm WarningGRBMenominee, Oconto, Shawano53 min
Jun 20, 5:44 PM EDTSevere Thunderstorm WarningGRBOneida20 min
Jun 20, 5:48 PM EDTSevere Thunderstorm WarningGRBForest, Marinette57 min
Jun 20, 6:03 PM EDTSevere Thunderstorm WarningMQTMenominee57 min
Jun 20, 6:14 PM EDTSevere Thunderstorm WarningMPXPolk46 min
Jun 20, 6:18 PM EDTSevere Thunderstorm WarningGRBDoor57 min
Jun 20, 6:21 PM EDTSevere Thunderstorm WarningGRBMarathon54 min
Jun 20, 6:43 PM EDTSevere Thunderstorm WarningMPXBarron62 min
Jun 20, 6:46 PM EDTSevere Thunderstorm WarningGRBMarinette29 min
Jun 20, 7:04 PM EDTSevere Thunderstorm WarningGRBOconto19 min
Jun 20, 7:12 PM EDTSevere Thunderstorm WarningGRBMarathon, Portage63 min
Jun 20, 7:18 PM EDTSevere Thunderstorm WarningGRBDoor27 min
Jun 20, 7:18 PM EDTSevere Thunderstorm WarningMPXPolk57 min
Jun 20, 7:21 PM EDTSevere Thunderstorm WarningGRBLincoln28 min
Jun 20, 7:30 PM EDTSevere Thunderstorm WarningMPXRusk60 min
Jun 20, 7:42 PM EDTSevere Thunderstorm WarningMPXBarron63 min
Jun 20, 7:43 PM EDTSevere Thunderstorm WarningARXTaylor77 min
Jun 20, 7:47 PM EDTSevere Thunderstorm WarningGRBWaupaca58 min
Jun 20, 7:51 PM EDTSevere Thunderstorm WarningDLHPrice24 min
Jun 20, 8:07 PM EDTSevere Thunderstorm WarningMPXPolk38 min
Jun 20, 8:15 PM EDTSevere Thunderstorm WarningGRBMarathon60 min
Jun 20, 8:34 PM EDTSevere Thunderstorm WarningMPXChippewa56 min
Jun 20, 8:38 PM EDTSevere Thunderstorm WarningGRBLincoln67 min
Jun 20, 8:59 PM EDTSevere Thunderstorm WarningMPXRusk27 min
Jun 20, 9:01 PM EDTSevere Thunderstorm WarningARXTaylor44 min
Jun 20, 9:08 PM EDTSevere Thunderstorm WarningGRBLanglade48 min
Jun 20, 9:15 PM EDTSevere Thunderstorm WarningGRBMarathon60 min
Jun 20, 9:21 PM EDTSevere Thunderstorm WarningGRBMenominee, Shawano54 min
Jun 20, 9:35 PM EDTSevere Thunderstorm WarningGRBBrown25 min
Jun 20, 9:48 PM EDTSevere Thunderstorm WarningARXClark, Taylor42 min
Jun 20, 9:48 PM EDTSevere Thunderstorm WarningGRBOutagamie19 min
Jun 20, 9:50 PM EDTSevere Thunderstorm WarningGRBOconto55 min
Jun 20, 10:10 PM EDTSevere Thunderstorm WarningGRBMarathon49 min
Jun 20, 10:15 PM EDTSevere Thunderstorm WarningGRBShawano15 min
Jun 20, 10:20 PM EDTSevere Thunderstorm WarningMPXSaint Croix55 min
Jun 20, 10:36 PM EDTSevere Thunderstorm WarningGRBWaupaca24 min
Jun 20, 10:48 PM EDTSevere Thunderstorm WarningGRBDoor, Kewaunee27 min
Jun 20, 10:51 PM EDTSevere Thunderstorm WarningGRBOutagamie, Shawano39 min
Jun 20, 11:00 PM EDTSevere Thunderstorm WarningMPXPierce60 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 7.2 hours before the alert went out and 191 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 12:00Z on 2007-06-20Temperature 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 12:00Z on 2007-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 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
1326 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 20, 2:52 PM EDTMesoscale DiscussionSPCAlger, Baraga, Delta, Dickinson, Gogebic, Iron and 2 more23 min
Jun 20, 7:57 PM EDTMesoscale DiscussionSPCAntrim, Benzie, Grand Traverse, Kalkaska, Lake, Manistee and 4 more63 min

Nearby

Severe Thunderstorm Watches in Wisconsin, 2007Severe Thunderstorm Watches in Michigan, 2007Every severe thunderstorm watch in 2007

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.