Alert archive / Wisconsin / Tornado Watches in 2002
Tornado Watch 110
The Storm Prediction Center issued this tornado watch at Apr 18, 2002, 2:30 PM CDT for 47 counties in Wisconsin. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 18, 2002, 2:30 PM CDT (19:30 UTC)
- Expired
- Apr 18, 2002, 8:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 47 counties
Adams County, WI, Calumet County, WI, Chippewa County, WI, Clark County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Eau Claire County, WI, Fond du Lac County, WI, Grant County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jackson County, WI, Jefferson County, WI, Juneau County, WI, Kenosha County, WI, La Crosse County, WI, Lafayette County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marquette County, WI, Menominee County, WI, Milwaukee County, WI, Monroe County, WI, Oconto County, WI, Outagamie County, WI, Ozaukee County, WI, Portage County, WI, Racine County, WI, Richland County, WI, Rock County, WI, Rusk County, WI, Sauk County, WI, Shawano County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI
The radar
The Green Bay radar (KGRB), 100 km from the middle of the area, began a volume at 19:31 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
53 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 2:48 PM CDT | Severe Thunderstorm Warning | MKX | Iowa, Lafayette, Sauk | 57 min |
| Apr 18, 2:57 PM CDT | Tornado Warning | ARX | Grant | 63 min |
| Apr 18, 2:59 PM CDT | Severe Thunderstorm Warning | ARX | Richland | 46 min |
| Apr 18, 3:07 PM CDT | Tornado Warning | MKX | Lafayette | 23 min |
| Apr 18, 3:29 PM CDT | Tornado Warning | MKX | Lafayette | 31 min |
| Apr 18, 3:31 PM CDT | Tornado Warning | MKX | Lafayette | 29 min |
| Apr 18, 3:44 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Iowa, Sauk | 61 min |
| Apr 18, 3:48 PM CDT | Severe Thunderstorm Warning | ARX | Adams, Juneau | 57 min |
| Apr 18, 3:53 PM CDT | Severe Thunderstorm Warning | GRB | Lincoln, Oneida | 37 min |
| Apr 18, 3:57 PM CDT | Tornado Warning | MKX | Green, Lafayette | 33 min |
| Apr 18, 4:03 PM CDT | Tornado Warning | MKX | Columbia, Sauk | 27 min |
| Apr 18, 4:12 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa | 63 min |
| Apr 18, 4:20 PM CDT | Severe Thunderstorm Warning | MPX | Eau Claire, Pepin | 40 min |
| Apr 18, 4:21 PM CDT | Severe Thunderstorm Warning | ARX | Taylor | 54 min |
| Apr 18, 4:29 PM CDT | Severe Thunderstorm Warning | GRB | Lincoln, Oneida | 46 min |
| Apr 18, 4:31 PM CDT | Tornado Warning | MKX | Columbia, Sauk | 29 min |
| Apr 18, 4:34 PM CDT | Tornado Warning | GRB | Lincoln, Oneida | 41 min |
| Apr 18, 4:45 PM CDT | Severe Thunderstorm Warning | MKX | Green, Rock | 60 min |
| Apr 18, 4:56 PM CDT | Severe Thunderstorm Warning | ARX | Juneau, Vernon | 49 min |
| Apr 18, 4:56 PM CDT | Tornado Warning | MKX | Rock | 49 min |
| Apr 18, 4:57 PM CDT | Severe Thunderstorm Warning | MPX | Eau Claire | 63 min |
| Apr 18, 4:59 PM CDT | Severe Thunderstorm Warning | MKX | Marquette | 31 min |
| Apr 18, 5:03 PM CDT | Severe Thunderstorm Warning | ARX | Taylor | 42 min |
| Apr 18, 5:07 PM CDT | Severe Thunderstorm Warning | GRB | Waushara, Winnebago | 53 min |
| Apr 18, 5:14 PM CDT | Severe Thunderstorm Warning | ARX | Monroe | 46 min |
| Apr 18, 5:16 PM CDT | Severe Thunderstorm Warning | GRB | Lincoln, Oneida | 59 min |
| Apr 18, 5:25 PM CDT | Severe Thunderstorm Warning | ARX | Clark | 65 min |
| Apr 18, 5:30 PM CDT | Severe Thunderstorm Warning | MKX | Jefferson, Rock, Walworth | 60 min |
| Apr 18, 5:32 PM CDT | Severe Thunderstorm Warning | MKX | Dane | 43 min |
| Apr 18, 5:33 PM CDT | Severe Thunderstorm Warning | GRB | Marathon | 57 min |
| Apr 18, 5:34 PM CDT | Severe Thunderstorm Warning | MPX | Rusk | 26 min |
| Apr 18, 5:44 PM CDT | Severe Thunderstorm Warning | ARX | Taylor | 61 min |
| Apr 18, 5:47 PM CDT | Severe Thunderstorm Warning | ARX | Adams, Juneau | 58 min |
| Apr 18, 5:57 PM CDT | Severe Thunderstorm Warning | MPX | Eau Claire | 63 min |
| Apr 18, 6:04 PM CDT | Severe Thunderstorm Warning | ARX | Trempealeau | 56 min |
| Apr 18, 6:10 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Jefferson | 35 min |
| Apr 18, 6:17 PM CDT | Severe Thunderstorm Warning | ARX | La Crosse | 88 min |
| Apr 18, 6:22 PM CDT | Severe Thunderstorm Warning | ARX | Clark | 53 min |
| Apr 18, 6:30 PM CDT | Severe Thunderstorm Warning | GRB | Marathon, Wood | 60 min |
| Apr 18, 6:34 PM CDT | Severe Thunderstorm Warning | ARX | Jackson, Monroe | 56 min |
| Apr 18, 6:42 PM CDT | Severe Thunderstorm Warning | ARX | Juneau | 78 min |
| Apr 18, 6:45 PM CDT | Severe Thunderstorm Warning | ARX | Crawford | 60 min |
| Apr 18, 6:59 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa | 31 min |
| Apr 18, 7:18 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha | 42 min |
| Apr 18, 7:21 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Jefferson | 39 min |
| Apr 18, 7:26 PM CDT | Severe Thunderstorm Warning | GRB | Lincoln, Oneida | 49 min |
| Apr 18, 7:26 PM CDT | Tornado Warning | GRB | Marathon | 34 min |
| Apr 18, 7:28 PM CDT | Severe Thunderstorm Warning | MKX | Rock | 62 min |
| Apr 18, 7:40 PM CDT | Severe Thunderstorm Warning | ARX | Grant, Richland | 95 min |
| Apr 18, 7:42 PM CDT | Severe Thunderstorm Warning | GRB | Portage, Shawano | 63 min |
| Apr 18, 7:49 PM CDT | Severe Thunderstorm Warning | ARX | Crawford | 56 min |
| Apr 18, 7:50 PM CDT | Severe Thunderstorm Warning | GRB | Langlade, Menominee | 55 min |
| Apr 18, 7:59 PM CDT | Severe Thunderstorm Warning | MKX | Sauk | 61 min |
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 7.5 hours before the alert went out and 100 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1774 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 460 m²/s²
- 0-3 km storm-relative helicity
- 766 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS20 KWNS 181918 SEL0 SPC WW 181914 WIZ000-LMZ000-190100- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 110 STORM PREDICTION CENTER NORMAN OK 214 PM CDT THU APR 18 2002 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF WISCONSIN LAKE MICHIGAN EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 230 PM UNTIL 800 PM CDT. TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 85 STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH NORTHWEST OF WAUSAU WISCONSIN TO 15 MILES SOUTHWEST OF JANESVILLE 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. DISCUSSION...VERY UNSTABLE AIR MASS ACROSS SRN WI WITH WARM FRONT MOVING NWD THRU CENTRAL PORTION OF STATE. SHEAR PROFILES ARE VERY FAVORABLE FOR ORGANZIED SEVERE THUNDERSTORMS AND ISOLATED TORNADIC SUPERCELLS. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM MOTION VECTOR 24035. ...HALES 422,0905 453,0914 453,0881 422,0873
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | Barron, Buffalo, Chippewa, Crawford, Dunn, Eau Claire and 10 more | 6 hr |
| Apr 18, 4:15 PM CDT | Tornado Watch | SPC | La Crosse, Monroe | 5 hr |
| Apr 18, 5:00 PM CDT | Tornado Watch | SPC | Florence, Forest, Oneida, Vilas | 5 hr |
Nearby
Tornado Watches in Wisconsin, 2002Every tornado 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.