Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 94, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 9, 2004, 5:56 PM CDT for Polk County, Saint Croix County, Wisconsin. It was in force for 64 min. 3 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
- May 9, 2004, 5:56 PM CDT (22:56 UTC)
- Expired
- May 9, 2004, 7:00 PM CDT
- In force
- 64 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
Counties Polk County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 113 km from the middle of the area, began a volume at 22:59 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 |
|---|---|---|---|
| May 9, 6:15 PM CDT | TSTM WND DMG | 5 Se Hudson, WI | A FEW TREES WERE DOWNED. |
| May 9, 6:15 PM CDT | HAIL 0.75 | Dresser, WI | |
| May 9, 6:16 PM CDT | TSTM WND GST 58 | New Richmond, WI |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 9, 3:55 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 10.9 hours before the alert went out and 115 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
- -483 J/kg
- Mixed-layer LCL
- 802 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 207 m²/s²
- 0-3 km storm-relative helicity
- 170 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 092256 SVRMPX WIC095-109-100000- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 555 PM CDT SUN MAY 9 2004 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... POLK COUNTY IN NORTHWEST WISCONSIN THIS INCLUDES THE CITIES OF...BALSAM LAKE...AMERY ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN THIS INCLUDES THE CITY OF NEW RICHMOND * UNTIL 700 PM CDT * AT 551 PM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 24 MILES NORTH OF BALSAM LAKE TO 11 MILES SOUTHWEST OF NEW RICHMOND...OR ALONG A LINE EXTENDING FROM 23 MILES SOUTHEAST OF HINCKLEY...TO 9 MILES NORTH OF RIVER FALLS...AND MOVING EAST AT 45 MPH. * LOCATIONS IMPACTED INCLUDE... AMERY. BALSAM LAKE. NEW RICHMOND. LAT...LON 4589 9257 4489 9273 4489 9220 4589 9215 $$
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 6:23 PM CDT | Severe Thunderstorm Warning | MPX | Pierce | 67 min |
| May 9, 6:34 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Dunn, Pepin | 41 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.