Alert archive / Wisconsin / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 709
The Storm Prediction Center issued this severe thunderstorm watch at Sep 30, 2002, 7:25 PM EDT for 5 counties in Michigan; 11 counties in Wisconsin. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 30, 2002, 7:25 PM EDT (23:25 UTC)
- Expired
- Oct 1, 2002, 12:00 AM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
Counties Baraga County, MI, Dickinson County, MI, Iron County, MI, Marquette County, MI, Menominee County, MI, Florence County, WI, Forest County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Shawano County, WI, Vilas County, WI
The radar
The Green Bay radar (KGRB), 123 km from the middle of the area, began a volume at 23:24 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
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 30, 7:54 PM EDT | Tornado Warning | GRB | Lincoln | 51 min |
| Sep 30, 7:55 PM EDT | Severe Thunderstorm Warning | MQT | Dickinson | 50 min |
| Sep 30, 8:11 PM EDT | Tornado Warning | MQT | Dickinson | 34 min |
| Sep 30, 8:15 PM EDT | Tornado Warning | GRB | Marathon, Wood | 45 min |
| Sep 30, 8:29 PM EDT | Tornado Warning | GRB | Oneida | 61 min |
| Sep 30, 8:43 PM EDT | Tornado Warning | GRB | Lincoln | 32 min |
| Sep 30, 8:44 PM EDT | Severe Thunderstorm Warning | MQT | Menominee | 61 min |
| Sep 30, 8:51 PM EDT | Severe Thunderstorm Warning | MQT | Iron | 24 min |
| Sep 30, 8:56 PM EDT | Severe Thunderstorm Warning | MQT | Dickinson | 49 min |
| Sep 30, 9:12 PM EDT | Severe Thunderstorm Warning | MQT | Baraga, Houghton | 48 min |
| Sep 30, 9:15 PM EDT | Severe Thunderstorm Warning | GRB | Lincoln | 45 min |
| Sep 30, 9:15 PM EDT | Severe Thunderstorm Warning | GRB | Lincoln | 45 min |
| Sep 30, 9:25 PM EDT | Severe Thunderstorm Warning | MQT | Iron | 35 min |
| Sep 30, 9:46 PM EDT | Severe Thunderstorm Warning | MQT | Marquette | 59 min |
| Sep 30, 11:04 PM EDT | Flash Flood Warning | MQT | Dickinson | 6 hr |
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.4 hours before the alert went out and 125 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
- 460 J/kg
- Mixed-layer CIN
- -228 J/kg
- Mixed-layer LCL
- 1152 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 321 m²/s²
- 0-3 km storm-relative helicity
- 377 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.8
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 30, 4:05 PM EDT | Tornado Watch | SPC | Ashland, Barron, Bayfield, Buffalo, Burnett, Chippewa and 17 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Wisconsin, 2002Severe Thunderstorm Watches in Michigan, 2002Every severe thunderstorm watch in 2002
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.