Alert archive / Wisconsin / Tornado Watches in 1999
Tornado Watch 542
The Storm Prediction Center issued this tornado watch at Jul 8, 1999, 6:15 PM CDT for 10 counties in Minnesota; 14 counties in Wisconsin. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 8, 1999, 6:15 PM CDT (23:15 UTC)
- Expired
- Jul 8, 1999, 11:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 24 counties
Dodge County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Steele County, MN, Wabasha County, MN, Winona County, MN, Buffalo County, WI, Chippewa County, WI, Clark County, WI, Dunn County, WI, Eau Claire County, WI, Jackson County, WI, La Crosse County, WI, Marathon County, WI, Monroe County, WI, Pepin County, WI, Pierce County, WI, Trempealeau County, WI, Vernon County, WI, Wood County, WI
The radar
The La Crosse radar (KARX), 69 km from the middle of the area, began a volume at 23:15 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
22 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 6:21 PM CDT | Tornado Warning | MPX | Chippewa | 39 min |
| Jul 8, 6:22 PM CDT | Severe Thunderstorm Warning | ARX | Buffalo | 68 min |
| Jul 8, 6:30 PM CDT | Severe Thunderstorm Warning | ARX | Wabasha | 45 min |
| Jul 8, 6:40 PM CDT | Tornado Warning | ARX | Wabasha | 35 min |
| Jul 8, 6:50 PM CDT | Tornado Warning | MPX | Eau Claire | 35 min |
| Jul 8, 6:52 PM CDT | Severe Thunderstorm Warning | ARX | Winona | 68 min |
| Jul 8, 6:53 PM CDT | Severe Thunderstorm Warning | ARX | Clark | 62 min |
| Jul 8, 6:54 PM CDT | Severe Thunderstorm Warning | MPX | Freeborn, Steele | 51 min |
| Jul 8, 6:59 PM CDT | Severe Thunderstorm Warning | GRB | Lincoln, Marathon | 56 min |
| Jul 8, 7:00 PM CDT | Tornado Warning | ARX | Winona | 60 min |
| Jul 8, 7:07 PM CDT | Severe Thunderstorm Warning | GRB | Wood | 63 min |
| Jul 8, 7:13 PM CDT | Tornado Warning | ARX | Trempealeau | 47 min |
| Jul 8, 7:15 PM CDT | Severe Thunderstorm Warning | ARX | Jackson | 75 min |
| Jul 8, 7:24 PM CDT | Tornado Warning | GRB | Marathon, Wood | 46 min |
| Jul 8, 7:36 PM CDT | Severe Thunderstorm Warning | ARX | La Crosse | 69 min |
| Jul 8, 7:45 PM CDT | Severe Thunderstorm Warning | ARX | Houston | 60 min |
| Jul 8, 7:49 PM CDT | Tornado Warning | ARX | Clark, Jackson | 56 min |
| Jul 8, 8:06 PM CDT | Severe Thunderstorm Warning | ARX | Monroe | 84 min |
| Jul 8, 8:28 PM CDT | Tornado Warning | ARX | La Crosse | 17 min |
| Jul 8, 8:41 PM CDT | Tornado Warning | ARX | La Crosse, Monroe | 64 min |
| Jul 8, 8:50 PM CDT | Severe Thunderstorm Warning | ARX | Fillmore, Houston | 65 min |
| Jul 8, 9:03 PM CDT | Severe Thunderstorm Warning | ARX | Vernon | 57 min |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 11.3 hours before the alert went out and 154 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
- 8 J/kg
- Mixed-layer CIN
- -308 J/kg
- Mixed-layer LCL
- 1425 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
Nearby
Tornado Watches in Wisconsin, 1999Tornado Watches in Minnesota, 1999Every tornado watch in 1999
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.