Alert archive / Wisconsin / Mesoscale Discussions in 2003
Mesoscale Discussion 1913
The Storm Prediction Center issued this mesoscale discussion at Jul 20, 2003, 4:27 PM EDT for 10 counties in Michigan; Carlton County, Lake County, Saint Louis County, Minnesota; 14 counties in Wisconsin. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Jul 20, 2003, 4:27 PM EDT (20:27 UTC)
- Expired
- Jul 20, 2003, 5:30 PM EDT
- In force
- 63 min
- 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
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.5 hours before the alert went out and 257 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
The text
As transmitted, in the capitals the NWS used until 2016.
603 ACUS11 KWNS 202027 SWOMCD SPC MCD 202027 MIZ000-WIZ000-MNZ000-202130- MESOSCALE DISCUSSION 1913 NWS STORM PREDICTION CENTER NORMAN OK 0327 PM CDT SUN JUL 20 2003 AREAS AFFECTED...NERN MN...NRN WI...U.P. OF MI CONCERNING...SEVERE THUNDERSTORM WATCH 772... VALID 202027Z - 202130Z CU FIELD IS DEEPENING ACROSS MUCH OF WW WITH ISOLATED THUNDERSTORMS NOW EVIDENT NEAR DLH...AND DOWNSTREAM ACROSS THE U.P. OF MI. STRONG SUNSHINE AND APPROACHING SPEED MAX SHOULD ENHANCE THIS ACTIVITY OVER THE NEXT FEW HOURS. ..DARROW.. 07/20/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...MQT...GRB...DLH... 46159271 48199270 46478632 44478631
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, 2:55 PM EDT | Severe Thunderstorm Watch | SPC | Alger, Baraga, Delta, Dickinson, Gogebic, Houghton and 4 more | 7 hr |
| 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
Mesoscale Discussions in Wisconsin, 2003Mesoscale Discussions in Michigan, 2003Mesoscale Discussions in Minnesota, 2003Every mesoscale discussion 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.