Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 55, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 18, 2002, 5:57 PM CDT for Eau Claire County, Wisconsin. It was in force for 63 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 18, 2002, 5:57 PM CDT (22:57 UTC)
- Expired
- Apr 18, 2002, 7:00 PM CDT
- In force
- 63 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
County Eau Claire County, WI
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 18, 6:10 PM CDT | Hail 0.75 | Foster, WI | |
| Apr 18, 6:30 PM CDT | Hail 1 | Augusta, WI |
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 |
|---|---|---|---|
| Apr 18, 2:30 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 11.0 hours before the alert went out and 189 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
- 1064 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 745 m²/s²
- 0-3 km storm-relative helicity
- 912 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KMPX 182257 SVRMSP WIC035-190000- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 557 PM CDT THU APR 18 2002 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAU CLAIRE COUNTY IN WEST CENTRAL WISCONSIN * UNTIL 700 PM CDT * AT 557 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL AND DAMAGING WINDS 3 MILES SOUTHEAST OF FALL CREEK...OR ABOUT 11 MILES SOUTHEAST OF ALTOONA...MOVING EAST AT 30 MPH. * SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE... AUGUSTA. FALL CREEK. FOSTER. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER... SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4482 9133 4463 9149 4463 9095 4485 9097
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 3:52 AM CDT | Severe Thunderstorm Warning | MPX | Pierce, Saint Croix | 53 min |
| Apr 18, 4:49 AM CDT | Severe Thunderstorm Warning | MPX | Barron, Dunn | 41 min |
| Apr 18, 5:24 AM CDT | Tornado Warning | MPX | Dunn | 21 min |
| Apr 18, 5:36 AM CDT | Severe Thunderstorm Warning | MPX | Barron | 24 min |
| Apr 18, 5:42 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa | 33 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, 4:28 PM CDT | Severe Thunderstorm Warning | MPX | Dunn | 32 min |
| Apr 18, 4:57 PM CDT | Severe Thunderstorm Warning | MPX | Eau Claire | 63 min |
| Apr 18, 5:34 PM CDT | Severe Thunderstorm Warning | MPX | Rusk | 26 min |
| Apr 18, 6:59 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa | 31 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2002Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.