Alert archive / Wisconsin / Tornado Watches in 1997
Tornado Watch 655
The Storm Prediction Center issued this tornado watch at Jul 25, 1997, 7:45 PM CDT for 10 counties in Illinois; Jackson County, Iowa; 26 counties in Wisconsin. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 25, 1997, 7:45 PM CDT (00:45 UTC)
- Expired
- Jul 26, 1997, 1:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 37 counties
Jackson County, IA, Boone County, IL, Carroll County, IL, Cook County, IL, Jo Daviess County, IL, Kane County, IL, Lake County, IL, McHenry County, IL, Ogle County, IL, Stephenson County, IL, Winnebago County, IL, Adams 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, Jefferson County, WI, Juneau County, WI, Kenosha County, WI, Lafayette County, WI, Marquette County, WI, Milwaukee County, WI, Monroe County, WI, Ozaukee 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, Waushara County, WI, Winnebago County, WI
The radar
The Milwaukee radar (KMKX), 72 km from the middle of the area, began a volume at 00:45 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
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 8:01 PM CDT | Tornado Warning | MKX | Dane, Jefferson | 34 min |
| Jul 25, 8:21 PM CDT | Severe Thunderstorm Warning | MKX | Ozaukee, Sheboygan, Washington | 59 min |
| Jul 25, 8:28 PM CDT | Tornado Warning | MKX | Dane, Jefferson | 32 min |
| Jul 25, 8:57 PM CDT | Tornado Warning | MKX | Dane, Dodge, Jefferson | 63 min |
| Jul 25, 9:17 PM CDT | Flash Flood Warning | MKX | Dane, Jefferson | 3 hr |
| Jul 25, 11:11 PM CDT | Severe Thunderstorm Warning | MKX | Ozaukee, Washington | 49 min |
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.8 hours before the alert went out and 169 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
- 738 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 543 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 193 m²/s²
- 0-3 km storm-relative helicity
- 246 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KNAW 260045 MKC WW 260027 ILZ000-WIZ000-LMZ000-260600- BULLETIN - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 655 STORM PREDICTION CENTER NORMAN OK 727 PM CDT FRI JUL 25 1997 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF NORTHERN ILLINOIS SOUTHERN WISCONSIN SOUTHWEST LAKE MICHIGAN EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 745 PM UNTIL 100 AM CDT. TORNADOES...HAIL TO 1 3/4 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 75 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST SOUTHWEST OF LONEROCK WISCONSIN TO 25 MILES EAST OF MILWAUKEE WISCONSIN. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. OTHER WATCH INFORMATION... CONTINUE...WW 653...WW 654... DISCUSSION...STORMS DEVELOPING ALONG OLD OUTFLOW BOUNDARY. SHEAR FAVORABLE FOR SUPERCELLS. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 3/4 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 29020. ...VESCIO ;441,0903 440,0872 415,0872 415,0903;
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 11:00 PM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Dickinson, Lyon, O'Brien, Osceola, Sioux | 4 hr |
| Jul 26, 11:00 AM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clayton and 12 more | 6 hr |
| Jul 26, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Calumet, Columbia, Dane, Dodge, Fond du Lac and 19 more | 6 hr |
Nearby
Tornado Watches in Wisconsin, 1997Tornado Watches in Illinois, 1997Tornado Watches in Iowa, 1997Every tornado watch in 1997
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.