Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 15, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 9, 2017, 8:58 PM CDT for Dunn County, Pierce County, Saint Croix County, Wisconsin. It was in force for 32 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
- Apr 9, 2017, 8:58 PM CDT (01:58 UTC)
- Expired
- Apr 9, 2017, 9:30 PM CDT
- In force
- 32 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 50.0 mph
Counties Dunn County, WI, Pierce County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 100 km from the middle of the area, began a volume at 02:00 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 |
|---|---|---|---|
| Apr 9, 9:15 PM CDT | HAIL 1 | Spring Valley, WI | DIME TO QUARTER SIZE HAIL REPORTED. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 2.0 hours before the alert went out and 102 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
- 1596 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 173 m²/s²
- 0-3 km storm-relative helicity
- 450 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
362 WUUS53 KMPX 100158 SVRMPX WIC033-093-109-100230- /O.NEW.KMPX.SV.W.0015.170410T0158Z-170410T0230Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Twin Cities/Chanhassen MN 858 PM CDT SUN APR 9 2017 The National Weather Service in The Twin Cities has issued a * Severe Thunderstorm Warning for... Northeastern Pierce County in west central Wisconsin... West central Dunn County in west central Wisconsin... Southeastern St. Croix County in west central Wisconsin... * Until 930 PM CDT * At 858 PM CDT, a severe thunderstorm was located near Martel, or near Ellsworth, moving northeast at 40 mph. HAZARD...Half dollar size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * this severe thunderstorm will remain over mainly rural areas of northeastern Pierce...west central Dunn and southeastern St. Croix Counties, including the following locations: El Paso, Weston, Wilson, and Woodville This includes Interstate 94 in Wisconsin between mile markers 21 and 38. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Prepare immediately for large hail and deadly cloud to ground lightning. Seek shelter inside a well-built structure. Stay away from windows. && LAT...LON 4470 9245 4482 9254 4509 9213 4485 9194 TIME...MOT...LOC 0158Z 232DEG 34KT 4481 9246 HAIL...1.25IN WIND...<50MPH $$ ETA
1 follow-up statement
757 WWUS53 KMPX 100217 SVSMPX Severe Weather Statement National Weather Service Twin Cities/Chanhassen MN 917 PM CDT SUN APR 9 2017 WIC033-093-109-100230- /O.CON.KMPX.SV.W.0015.000000T0000Z-170410T0230Z/ Pierce WI-Dunn WI-St. Croix WI- 917 PM CDT SUN APR 9 2017 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR NORTHEASTERN PIERCE...WEST CENTRAL DUNN AND SOUTHEASTERN ST. CROIX COUNTIES... At 917 PM CDT, a severe thunderstorm was located over Woodville, or 16 miles northeast of Ellsworth, moving northeast at 40 mph. HAZARD...Half dollar size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Weston, Spring Valley, Knapp and Wilson. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Prepare immediately for large hail and deadly cloud to ground lightning. Seek shelter inside a well-built structure. Stay away from windows. && LAT...LON 4477 9222 4491 9225 4502 9207 4485 9194 TIME...MOT...LOC 0217Z 232DEG 34KT 4492 9226 HAIL...1.25IN WIND...<50MPH $$ ETA
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 8:31 PM CDT | Special Weather Statement | MPX | Pierce | 29 min |
| Apr 9, 9:30 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Dunn | 30 min |
| Apr 9, 9:57 PM CDT | Special Weather Statement | MPX | Chippewa | 33 min |
| Apr 9, 10:32 PM CDT | Special Weather Statement | MPX | Chippewa | 13 min |
| Apr 9, 10:49 PM CDT | Special Weather Statement | MPX | Rusk | 41 min |
| Apr 9, 11:23 PM CDT | Special Weather Statement | MPX | Eau Claire | 37 min |
| Apr 9, 11:43 PM CDT | Special Weather Statement | MPX | Eau Claire | 32 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2017Every severe thunderstorm warning in 2017
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.