Alert archive / Wisconsin / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 816
The Storm Prediction Center issued this severe thunderstorm watch at Jul 30, 2003, 3:20 PM EDT for 6 counties in Michigan; 32 counties in Wisconsin. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 30, 2003, 3:20 PM EDT (19:20 UTC)
- Expired
- Jul 30, 2003, 9:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 38 counties
Baraga County, MI, Dickinson County, MI, Gogebic County, MI, Iron County, MI, Menominee County, MI, Ontonagon County, MI, Ashland County, WI, Barron County, WI, Bayfield County, WI, Brown County, WI, Chippewa County, WI, Clark County, WI, Douglas County, WI, Dunn County, WI, Eau Claire County, WI, Florence County, WI, Forest County, WI, Iron 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, Portage County, WI, Price County, WI, Rusk County, WI, Sawyer County, WI, Shawano County, WI, Taylor County, WI, Vilas County, WI, Washburn County, WI, Waupaca County, WI, Wood County, WI
The radar
The Duluth radar (KDLH), 188 km from the middle of the area, began a volume at 19:19 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
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 3:27 PM EDT | Severe Thunderstorm Warning | GRB | Outagamie | 33 min |
| Jul 30, 5:02 PM EDT | Severe Thunderstorm Warning | MQT | Dickinson | 48 min |
| Jul 30, 5:25 PM EDT | Flash Flood Warning | GRB | Outagamie | 4 hr |
| Jul 30, 6:08 PM EDT | Severe Thunderstorm Warning | GRB | Brown, Outagamie | 37 min |
| Jul 30, 6:57 PM EDT | Severe Thunderstorm Warning | MQT | Baraga | 58 min |
| Jul 30, 7:26 PM EDT | Severe Thunderstorm Warning | MQT | Baraga | 29 min |
| Jul 30, 7:34 PM EDT | Severe Thunderstorm Warning | GRB | Calumet, Outagamie, Winnebago | 56 min |
| Jul 30, 7:53 PM EDT | Flash Flood Warning | GRB | Waupaca | 3 hr |
| Jul 30, 8:17 PM EDT | Flash Flood Warning | GRB | Brown, Calumet, Manitowoc | 3 hr |
| Jul 30, 8:22 PM EDT | Severe Thunderstorm Warning | MQT | Ontonagon | 53 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, 7.3 hours before the alert went out and 228 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.
- Mixed-layer CAPE
- 239 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 1038 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -70 m²/s²
- 0-3 km storm-relative helicity
- -72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 3:06 PM EDT | Mesoscale Discussion | SPC | Iron | 114 min |
| Jul 30, 1:26 PM EDT | Mesoscale Discussion | SPC | Barron, Burnett, Douglas, Polk, Sawyer, Washburn | 2 hr |
| Jul 30, 7:22 PM EDT | Mesoscale Discussion | SPC | Adams, Calumet, Columbia, Crawford, Dane, Dodge and 21 more | 113 min |
Nearby
Severe Thunderstorm Watches in Wisconsin, 2003Severe Thunderstorm Watches in Michigan, 2003Every severe thunderstorm watch in 2003
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.