Alert archive / Minnesota / Tornado Warnings in 1999
Tornado Warning 3, NWS La Crosse, WI
NWS La Crosse, WI issued this tornado warning at Jul 8, 1999, 7:00 PM CDT for Winona County, Minnesota. It was in force for 60 min. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 8, 1999, 7:00 PM CDT (00:00 UTC)
- Expired
- Jul 8, 1999, 8:00 PM CDT
- In force
- 60 min
- Issued by
- NWS La Crosse, WI
- Area
- Whole counties
County Winona County, MN
The radar
The La Crosse radar (KARX), 51 km from the middle of the area, began a volume at 00:04 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 8, 7:20 PM CDT | Tornado F2 | Lewiston, MN | |
| Jul 8, 7:32 PM CDT | Hail 0.75 | Nodine, MN | |
| Jul 8, 7:58 PM CDT | Hail 0.75 | Dresbach, MN |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 8, 6:15 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.0 hours before the alert went out and 174 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
- 2575 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 1341 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 157 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 15.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLSE 090000 RRA TORLSE MNC169-090100- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 700 PM CDT THU JUL 8 1999 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * TORNADO WARNING FOR... WINONA COUNTY IN SOUTHEASTERN MINNESOTA * UNTIL 800 PM CDT * AT 655 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO 3 MILES WEST OF ALTURA...15 MILES WEST OF WINONA... MOVING EAST AT 30 MPH. * THE TORNADO WILL BE NEAR... ALTURA AROUND 705 PM UTICA AROUND 715 PM LEWISTON AROUND 720 PM GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR! SHEA/THOMPSON
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 7:45 PM CDT | Severe Thunderstorm Warning | ARX | Houston | 60 min |
| Jul 8, 8:50 PM CDT | Severe Thunderstorm Warning | ARX | Fillmore, Houston | 65 min |
Nearby
Tornado Warnings in Minnesota, 1999Every tornado warning in 1999Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.