Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 224, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 30, 2002, 4:41 PM CDT for Dunn County, Wisconsin. It was in force for 49 min. 1 report 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
- Jul 30, 2002, 4:41 PM CDT (21:41 UTC)
- Expired
- Jul 30, 2002, 5:30 PM CDT
- In force
- 49 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
County Dunn County, WI
The radar
The Minneapolis radar (KMPX), 128 km from the middle of the area, began a volume at 21:42 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 30, 5:40 PM CDT | Hail 0.75 | Menomonie, 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 |
|---|---|---|---|
| Jul 30, 3:40 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 9.7 hours before the alert went out and 131 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
- 767 J/kg
- Mixed-layer CIN
- -274 J/kg
- Mixed-layer LCL
- 2024 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 199 m²/s²
- 0-3 km storm-relative helicity
- 280 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
917 WUUS53 KMPX 302141 SVRMSP WIC033-302230- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 441 PM CDT TUE JUL 30 2002 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... DUNN COUNTY IN WEST CENTRAL WISCONSIN * UNTIL 530 PM CDT * AT 441 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL 8 MILES WEST OF KNAPP...OR ABOUT 17 MILES WEST OF MENOMONIE... MOVING EAST AT 35 MPH. * SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE... BOYCEVILLE. COLFAX. DOWNING. ELK MOUND. KNAPP. MENOMONIE. TAINTER LAKE. THIS IS A DANGEROUS STORM WITH LARGE HAIL...STAY INDOORS AWAY FROM WINDOWS. LAT...LON 4506 9213 4483 9212 4471 9168 4500 9167 RAH/SEB
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 4:30 PM CDT | Severe Thunderstorm Warning | MPX | Pierce, Saint Croix | 30 min |
| Jul 30, 5:19 PM CDT | Severe Thunderstorm Warning | MPX | Pepin | 41 min |
| Jul 30, 5:30 PM CDT | Severe Thunderstorm Warning | MPX | Dunn | 45 min |
| Jul 30, 5:39 PM CDT | Severe Thunderstorm Warning | MPX | Eau Claire | 66 min |
| Jul 30, 6:02 PM CDT | Flash Flood Warning | MPX | Chippewa, Dunn, Eau Claire | 88 min |
| Jul 30, 6:16 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa | 44 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; radar from the NEXRAD Level II archive.