Alert archive / Michigan / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 563
The Storm Prediction Center issued this severe thunderstorm watch at Aug 1, 2002, 11:20 AM EDT for 41 counties in Michigan; 21 counties in Wisconsin. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 1, 2002, 11:20 AM EDT (15:20 UTC)
- Expired
- Aug 1, 2002, 4:00 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 62 counties
Alcona County, MI, Alpena County, MI, Antrim County, MI, Arenac County, MI, Bay County, MI, Benzie County, MI, Charlevoix County, MI, Cheboygan County, MI, Clare County, MI, Crawford County, MI, Delta County, MI, Dickinson County, MI, Emmet County, MI, Gladwin County, MI, Grand Traverse County, MI, Huron County, MI, Iosco County, MI, Iron County, MI, Isabella County, MI, Kalkaska County, MI, Lake County, MI, Lapeer County, MI, Leelanau County, MI, Manistee County, MI, Mason County, MI, Mecosta County, MI, Menominee County, MI, Midland County, MI, Missaukee County, MI, Montmorency County, MI, Newaygo County, MI, Ogemaw County, MI, Osceola County, MI, Oscoda County, MI, Otsego County, MI, Presque Isle County, MI, Roscommon County, MI, Saginaw County, MI, Sanilac County, MI, Tuscola County, MI, Wexford County, MI, Brown County, WI, Calumet County, WI, Door County, WI, Florence County, WI, Forest 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, Shawano County, WI, Vilas County, WI, Waupaca County, WI, Winnebago County, WI, Wood County, WI
The radar
The Green Bay radar (KGRB), 126 km from the middle of the area, began a volume at 15:20 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
14 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 11:58 AM EDT | Severe Thunderstorm Warning | GRB | Door | 47 min |
| Aug 1, 11:59 AM EDT | Severe Thunderstorm Warning | GRB | Vilas | 61 min |
| Aug 1, 12:09 PM EDT | Severe Thunderstorm Warning | MQT | Iron | 51 min |
| Aug 1, 12:37 PM EDT | Tornado Warning | MQT | Baraga, Iron | 53 min |
| Aug 1, 1:04 PM EDT | Severe Thunderstorm Warning | GRB | Vilas | 56 min |
| Aug 1, 1:28 PM EDT | Tornado Warning | MQT | Iron | 32 min |
| Aug 1, 1:39 PM EDT | Severe Thunderstorm Warning | APX | Antrim, Charlevoix | 51 min |
| Aug 1, 1:40 PM EDT | Severe Thunderstorm Warning | GRB | Forest, Oneida | 50 min |
| Aug 1, 1:47 PM EDT | Severe Thunderstorm Warning | MQT | Gogebic, Iron | 58 min |
| Aug 1, 1:48 PM EDT | Tornado Warning | APX | Charlevoix | 27 min |
| Aug 1, 2:04 PM EDT | Severe Thunderstorm Warning | APX | Otsego | 41 min |
| Aug 1, 2:13 PM EDT | Severe Thunderstorm Warning | APX | Cheboygan | 47 min |
| Aug 1, 2:18 PM EDT | Tornado Warning | APX | Otsego | 27 min |
| Aug 1, 3:11 PM EDT | Severe Thunderstorm Warning | MQT | Alger, Delta, Marquette | 64 min |
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 3.3 hours before the alert went out and 126 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
- 2319 J/kg
- Mixed-layer CIN
- -189 J/kg
- Mixed-layer LCL
- 922 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 207 m²/s²
- 0-3 km storm-relative helicity
- 198 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 8.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 5:45 AM EDT | Severe Thunderstorm Watch | SPC | Alger, Baraga, Delta, Dickinson, Houghton, Iron and 4 more | 4 hr |
| Aug 1, 3:25 PM EDT | Severe Thunderstorm Watch | SPC | Alger, Alpena, Antrim, Baraga, Benzie, Charlevoix and 24 more | 6 hr |
| Aug 1, 6:30 PM EDT | Tornado Watch | SPC | Alcona, Alpena, Antrim, Arenac, Bay, Cheboygan and 34 more | 6 hr |
| Aug 1, 7:10 PM EDT | Severe Thunderstorm Watch | SPC | Allegan, Berrien, Van Buren | 6 hr |
| Jul 31, 11:00 PM EDT | Severe Thunderstorm Watch | SPC | Douglas | 6 hr |
Nearby
Severe Thunderstorm Watches in Michigan, 2002Severe Thunderstorm Watches in Wisconsin, 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.