Alert archive / Wisconsin / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 772
The Storm Prediction Center issued this severe thunderstorm watch at Jul 20, 2003, 2:55 PM EDT for 10 counties in Michigan; Carlton County, Lake County, Saint Louis County, Minnesota; 14 counties in Wisconsin. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 20, 2003, 2:55 PM EDT (18:55 UTC)
- Expired
- Jul 20, 2003, 10:00 PM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 27 counties
Alger County, MI, Baraga County, MI, Delta County, MI, Dickinson County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Marquette County, MI, Menominee County, MI, Ontonagon County, MI, Carlton County, MN, Lake County, MN, Saint Louis County, MN, Ashland County, WI, Bayfield County, WI, Door County, WI, Douglas County, WI, Florence County, WI, Forest County, WI, Iron County, WI, Langlade County, WI, Marinette County, WI, Oconto County, WI, Oneida County, WI, Price County, WI, Sawyer County, WI, Vilas County, WI
Warnings issued inside it
24 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 3:26 PM EDT | Severe Thunderstorm Warning | MQT | Delta | 49 min |
| Jul 20, 5:26 PM EDT | Severe Thunderstorm Warning | DLH | Bayfield | 64 min |
| Jul 20, 5:35 PM EDT | Severe Thunderstorm Warning | DLH | Bayfield | 55 min |
| Jul 20, 6:07 PM EDT | Severe Thunderstorm Warning | GRB | Florence, Forest | 38 min |
| Jul 20, 6:30 PM EDT | Severe Thunderstorm Warning | MQT | Gogebic | 60 min |
| Jul 20, 6:46 PM EDT | Severe Thunderstorm Warning | MQT | Ontonagon | 74 min |
| Jul 20, 6:46 PM EDT | Severe Thunderstorm Warning | GRB | Forest, Marinette | 59 min |
| Jul 20, 6:56 PM EDT | Severe Thunderstorm Warning | DLH | Ashland, Price | 49 min |
| Jul 20, 7:01 PM EDT | Severe Thunderstorm Warning | GRB | Door | 29 min |
| Jul 20, 7:04 PM EDT | Severe Thunderstorm Warning | MQT | Dickinson | 56 min |
| Jul 20, 7:15 PM EDT | Severe Thunderstorm Warning | MQT | Marquette, Menominee | 60 min |
| Jul 20, 7:26 PM EDT | Severe Thunderstorm Warning | MQT | Iron | 34 min |
| Jul 20, 7:28 PM EDT | Severe Thunderstorm Warning | GRB | Vilas | 47 min |
| Jul 20, 7:54 PM EDT | Severe Thunderstorm Warning | MQT | Houghton | 51 min |
| Jul 20, 8:00 PM EDT | Severe Thunderstorm Warning | MQT | Dickinson | 60 min |
| Jul 20, 8:03 PM EDT | Severe Thunderstorm Warning | MQT | Ontonagon | 27 min |
| Jul 20, 8:14 PM EDT | Severe Thunderstorm Warning | MQT | Menominee | 61 min |
| Jul 20, 8:16 PM EDT | Severe Thunderstorm Warning | DLH | Ashland, Iron | 59 min |
| Jul 20, 8:28 PM EDT | Severe Thunderstorm Warning | GRB | Forest, Oneida | 47 min |
| Jul 20, 8:46 PM EDT | Severe Thunderstorm Warning | MQT | Iron | 59 min |
| Jul 20, 8:57 PM EDT | Severe Thunderstorm Warning | MQT | Delta | 48 min |
| Jul 20, 9:22 PM EDT | Severe Thunderstorm Warning | DLH | Ashland, Sawyer | 53 min |
| Jul 20, 9:33 PM EDT | Severe Thunderstorm Warning | MQT | Gogebic, Ontonagon | 42 min |
| Jul 20, 9:37 PM EDT | Severe Thunderstorm Warning | MQT | Baraga, Houghton | 38 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, 6.9 hours before the alert went out and 295 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
- 765 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 716 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 1:41 PM EDT | Mesoscale Discussion | SPC | Barry, Branch, Calhoun, Eaton, Hillsdale, Ingham and 6 more | 64 min |
| Jul 20, 2:16 PM EDT | Mesoscale Discussion | SPC | Alger, Baraga, Dickinson, Gogebic, Houghton, Iron and 3 more | 119 min |
| Jul 20, 2:20 PM EDT | Severe Thunderstorm Watch | SPC | Alcona, Alpena, Arenac, Bay, Clare, Clinton and 28 more | 6 hr |
| Jul 20, 4:27 PM EDT | Mesoscale Discussion | SPC | Alger, Baraga, Delta, Dickinson, Gogebic, Houghton and 4 more | 63 min |
| Jul 20, 4:37 PM EDT | Mesoscale Discussion | SPC | Alcona, Alpena, Arenac, Bay, Crawford, Genesee and 21 more | 113 min |
| Jul 20, 7:23 PM EDT | Mesoscale Discussion | SPC | Berrien, Cass, Saint Joseph, Van Buren | 97 min |
| Jul 20, 7:45 PM EDT | Severe Thunderstorm Watch | SPC | Allegan, Antrim, Barry, Benzie, Berrien, Branch and 27 more | 5 hr |
| Jul 20, 7:47 PM EDT | Mesoscale Discussion | SPC | Baraga, Delta, Dickinson, Gogebic, Houghton, Iron and 3 more | 88 min |
| Jul 19, 8:16 PM EDT | Mesoscale Discussion | SPC | Beltrami, Clearwater, Itasca, Kittson, Koochiching, Marshall and 5 more | 89 min |
| Jul 20, 12:00 AM EDT | Severe Thunderstorm Watch | SPC | Becker, Beltrami, Clay, Clearwater, Hubbard, Mahnomen and 7 more | 5 hr |
| Jul 20, 2:15 AM EDT | Severe Thunderstorm Watch | SPC | Big Stone, Chippewa, Cottonwood, Douglas, Grant, Jackson and 15 more | 6 hr |
| Jul 20, 3:03 AM EDT | Mesoscale Discussion | SPC | Big Stone, Chippewa, Grant, Lac qui Parle, Lincoln, Lyon and 6 more | 117 min |
| Jul 20, 4:05 AM EDT | Severe Thunderstorm Watch | SPC | Becker, Clay, Grant, Norman, Otter Tail, Wilkin | 4 hr |
| Jul 20, 5:14 AM EDT | Mesoscale Discussion | SPC | Blue Earth, Brown, Carver, Chippewa, Cottonwood, Dakota and 34 more | 3 hr |
| Jul 20, 7:45 AM EDT | Severe Thunderstorm Watch | SPC | Blue Earth, Brown, Cottonwood, Faribault, Freeborn, Jackson and 15 more | 5 hr |
| Jul 20, 11:07 AM EDT | Mesoscale Discussion | SPC | Cottonwood, Jackson, Lincoln, Lyon, Murray, Nobles and 3 more | 53 min |
| Jul 20, 6:14 PM EDT | Mesoscale Discussion | SPC | Lincoln, Lyon, Murray, Pipestone, Rock, Yellow Medicine | 2 hr |
| Jul 20, 5:25 PM EDT | Severe Thunderstorm Watch | SPC | Brown, Calumet, Columbia, Dane, Dodge, Fond du Lac and 19 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Wisconsin, 2003Severe Thunderstorm Watches in Michigan, 2003Severe Thunderstorm Watches in Minnesota, 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.