Alert archive / Wisconsin / Tornado Watches in 1998
Tornado Watch 473
The Storm Prediction Center issued this tornado watch at May 31, 1998, 1:00 AM CDT for 13 counties in Illinois; 33 counties in Wisconsin. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 31, 1998, 1:00 AM CDT (06:00 UTC)
- Expired
- May 31, 1998, 6:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 46 counties
Boone County, IL, Carroll County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Kane County, IL, Lake County, IL, Lee County, IL, McHenry County, IL, Ogle County, IL, Stephenson County, IL, Whiteside County, IL, Winnebago County, IL, Adams County, WI, Brown County, WI, Calumet County, WI, Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jackson County, WI, Jefferson County, WI, Juneau County, WI, Kenosha County, WI, Lafayette County, WI, Marquette County, WI, Milwaukee County, WI, Monroe County, WI, Outagamie County, WI, Ozaukee County, WI, Portage County, WI, Racine County, WI, Richland County, WI, Rock County, WI, Sauk County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI
Warnings issued inside it
19 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 1:01 AM CDT | Severe Thunderstorm Warning | ARX | Crawford, Richland | 74 min |
| May 31, 1:01 AM CDT | Severe Thunderstorm Warning | MKX | Sauk | 89 min |
| May 31, 1:10 AM CDT | Severe Thunderstorm Warning | MKX | Columbia, Green Lake, Marquette | 80 min |
| May 31, 1:15 AM CDT | Severe Thunderstorm Warning | MKX | Iowa | 90 min |
| May 31, 1:17 AM CDT | Severe Thunderstorm Warning | GRB | Portage, Wood | 78 min |
| May 31, 1:24 AM CDT | Severe Thunderstorm Warning | GRB | Waupaca, Waushara | 61 min |
| May 31, 1:26 AM CDT | Severe Thunderstorm Warning | GRB | Brown, Calumet | 64 min |
| May 31, 1:28 AM CDT | Severe Thunderstorm Warning | MKX | Dane | 92 min |
| May 31, 1:28 AM CDT | Severe Thunderstorm Warning | MKX | Lafayette | 92 min |
| May 31, 1:46 AM CDT | Severe Thunderstorm Warning | MKX | Dodge, Fond du Lac | 89 min |
| May 31, 1:50 AM CDT | Severe Thunderstorm Warning | MKX | Green | 70 min |
| May 31, 1:57 AM CDT | Severe Thunderstorm Warning | MKX | Jefferson, Rock | 78 min |
| May 31, 2:01 AM CDT | Severe Thunderstorm Warning | GRB | Outagamie, Winnebago | 34 min |
| May 31, 2:15 AM CDT | Severe Thunderstorm Warning | MKX | Sheboygan, Washington | 75 min |
| May 31, 2:15 AM CDT | Severe Thunderstorm Warning | MKX | Waukesha | 75 min |
| May 31, 2:27 AM CDT | Severe Thunderstorm Warning | GRB | Brown, Calumet | 33 min |
| May 31, 2:27 AM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Ozaukee | 78 min |
| May 31, 2:27 AM CDT | Severe Thunderstorm Warning | MKX | Walworth | 78 min |
| May 31, 2:42 AM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine | 93 min |
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 6.0 hours before the alert went out and 137 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
- 450 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 891 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 358 m²/s²
- 0-3 km storm-relative helicity
- 509 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 9.7
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 3:00 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Clay, Crawford, Edwards, Effingham, Franklin and 21 more | 6 hr |
| May 30, 10:00 PM CDT | Tornado Watch | SPC | Barron, Burnett, Chippewa, Dunn, Pepin, Pierce and 6 more | 6 hr |
| May 30, 11:30 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Buffalo, Chippewa, Clark, Eau Claire, Jackson and 20 more | 6 hr |
| May 31, 12:00 AM CDT | Tornado Watch | SPC | Crawford, Grant | 5 hr |
Nearby
Tornado Watches in Wisconsin, 1998Tornado Watches in Illinois, 1998Every tornado watch in 1998
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.