Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 70, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 18, 2004, 9:00 PM CDT for Chippewa County, Dunn County, Eau Claire County, Wisconsin. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 18, 2004, 9:00 PM CDT (02:00 UTC)
- Expired
- Apr 18, 2004, 10:00 PM CDT
- In force
- 60 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
Counties Chippewa County, WI, Dunn County, WI, Eau Claire County, WI
The radar
The La Crosse radar (KARX), 128 km from the middle of the area, began a volume at 02:02 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.
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, 6:35 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 2.0 hours before the alert went out and 171 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
- 671 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 2341 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 244 m²/s²
- 0-3 km storm-relative helicity
- 328 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.7
The text
As transmitted, in the capitals the NWS used until 2016.
645
WUUS53 KMPX 190200
SVRMPX
WIC017-033-035-190300-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
900 PM CDT SUN APR 18 2004
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CHIPPEWA COUNTY IN WEST CENTRAL WISCONSIN
DUNN COUNTY IN WEST CENTRAL WISCONSIN
EAU CLAIRE COUNTY IN WEST CENTRAL WISCONSIN
* UNTIL 1000 PM CDT
* AT 900 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
ALONG A LINE EXTENDING FROM 6 MILES NORTHEAST OF NEW AUBURN TO 4
MILES NORTHEAST OF BOYCEVILLE...OR ALONG A LINE EXTENDING FROM 21
MILES SOUTHEAST OF RICE LAKE TO 13 MILES NORTH OF MENOMONIE...
MOVING EAST AT 25 MPH.
* LOCATIONS IMPACTED INCLUDE...
BLOOMER.
CHIPPEWA FALLS.
EAU CLAIRE.
MENOMONIE.
THIS IS A DANGEROUS STORM...STAY INDOORS AWAY FROM WINDOWS. SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.
LAT...LON 4522 9148 4506 9211 4478 9213 4464 9144
4462 9096 4489 9093 4527 9093
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 7:02 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Polk | 43 min |
| Apr 18, 7:13 PM CDT | Severe Thunderstorm Warning | MPX | Saint Croix | 47 min |
| Apr 18, 7:43 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Polk, Rusk | 47 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2004Every severe thunderstorm warning in 2004
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.