Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 63, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 14, 2020, 4:10 PM CDT for Eau Claire County, Wisconsin. It was in force for 35 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
- Jul 14, 2020, 4:10 PM CDT (21:10 UTC)
- Expired
- Jul 14, 2020, 4:45 PM CDT
- In force
- 35 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Eau Claire County, WI
The radar
The La Crosse radar (KARX), 98 km from the middle of the area, began a volume at 21:13 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 14, 4:18 PM CDT | TSTM WND DMG | 1 Nw Augusta, WI | SMALL TREES AND LARGE BRANCHES DOWN. TIME ESTIMATED. |
| Jul 14, 4:20 PM CDT | TSTM WND DMG | Augusta, WI | TREES ON WIRES IN TOWN. TIME ESTIMATED. |
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 12:00Z, 9.2 hours before the alert went out and 193 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
- 1202 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 835 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- -88 m²/s²
- Significant tornado parameter
- -0.2
- Supercell composite
- -2.9
The text
As transmitted.
673 WUUS53 KMPX 142110 SVRMPX WIC035-142145- /O.NEW.KMPX.SV.W.0063.200714T2110Z-200714T2145Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Twin Cities/Chanhassen MN 410 PM CDT Tue Jul 14 2020 The National Weather Service in The Twin Cities has issued a * Severe Thunderstorm Warning for... Eastern Eau Claire County in west central Wisconsin... * Until 445 PM CDT. * At 410 PM CDT, a severe thunderstorm was located over Augusta, or 18 miles southeast of Eau Claire, moving east at 45 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Augusta, Fall Creek, Fairchild, Ludington, Foster and Lake Eau Claire County Park. This includes Interstate 94 in Wisconsin between mile markers 79 and 86. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4460 9139 4485 9120 4485 9092 4460 9093 TIME...MOT...LOC 2110Z 277DEG 41KT 4467 9116 HAIL...0.75IN WIND...60MPH $$ BPH
2 follow-up statements
492 WWUS53 KMPX 142120 SVSMPX Severe Weather Statement National Weather Service Twin Cities/Chanhassen MN 420 PM CDT Tue Jul 14 2020 WIC035-142145- /O.CON.KMPX.SV.W.0063.000000T0000Z-200714T2145Z/ Eau Claire WI- 420 PM CDT Tue Jul 14 2020 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR EASTERN EAU CLAIRE COUNTY... At 419 PM CDT, a severe thunderstorm was located near Fairchild, or 21 miles west of Neillsville, moving east at 45 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Augusta, Fairchild, Ludington and Lake Eau Claire County Park. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4460 9129 4485 9113 4485 9092 4460 9093 TIME...MOT...LOC 2119Z 277DEG 41KT 4466 9100 TORNADO...POSSIBLE HAIL...0.75IN WIND...60MPH $$ BPH
852 WWUS53 KMPX 142133 SVSMPX Severe Weather Statement National Weather Service Twin Cities/Chanhassen MN 433 PM CDT Tue Jul 14 2020 WIC035-142145- /O.CON.KMPX.SV.W.0063.000000T0000Z-200714T2145Z/ Eau Claire WI- 433 PM CDT Tue Jul 14 2020 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR EASTERN EAU CLAIRE COUNTY... At 433 PM CDT, a severe thunderstorm was located near Fairchild, or 21 miles west of Neillsville, moving east at 35 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Augusta and Fairchild. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4460 9115 4485 9100 4485 9092 4460 9093 TIME...MOT...LOC 2133Z 276DEG 29KT 4466 9101 TORNADO...POSSIBLE HAIL...0.75IN WIND...60MPH $$ BPH
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 7:49 AM CDT | Special Weather Statement | MPX | Saint Croix | 41 min |
| Jul 14, 8:06 AM CDT | Special Weather Statement | MPX | Dunn | 39 min |
| Jul 14, 8:11 AM CDT | Special Weather Statement | MPX | Eau Claire | 2 hr |
| Jul 14, 10:21 AM CDT | Special Weather Statement | MPX | Eau Claire, Pepin | 114 min |
| Jul 14, 3:53 PM CDT | Special Weather Statement | MPX | Eau Claire | 82 min |
| Jul 14, 4:00 PM CDT | Special Weather Statement | MPX | Eau Claire | 30 min |
| Jul 14, 4:23 PM CDT | Tornado Warning | MPX | Eau Claire | 21 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2020Every severe thunderstorm warning in 2020
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.