Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 156, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 20, 2018, 8:08 PM CDT for Chippewa County, Eau Claire County, Wisconsin. It was in force for 37 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
- Sep 20, 2018, 8:08 PM CDT (01:08 UTC)
- Expired
- Sep 20, 2018, 8:45 PM CDT
- In force
- 37 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Chippewa County, WI, Eau Claire County, WI
The radar
The La Crosse radar (KARX), 115 km from the middle of the area, began a volume at 01:06 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 |
|---|---|---|---|
| Sep 20, 6:23 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.1 hours before the alert went out and 250 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
- 3 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 512 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 340 m²/s²
- 0-3 km storm-relative helicity
- 454 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
The text
As transmitted.
716 WUUS53 KMPX 210108 SVRMPX WIC017-035-210145- /O.NEW.KMPX.SV.W.0156.180921T0108Z-180921T0145Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Twin Cities/Chanhassen MN 808 PM CDT THU SEP 20 2018 The National Weather Service in The Twin Cities has issued a * Severe Thunderstorm Warning for... Chippewa County in west central Wisconsin... Eau Claire County in west central Wisconsin... * Until 845 PM CDT. * At 808 PM CDT, severe thunderstorms were located along a line extending from near Bloomer to near Eleva, moving east at 60 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Severe thunderstorms will be near... Augusta and Cornell around 830 PM CDT. Fairchild around 835 PM CDT. Other locations impacted by these severe thunderstorms include Foster, Brackett, Holcombe, Lake Eau Claire County Park, Bateman, Ludington, Otter Lake, Jim Falls, Allen and Eagleton. This includes Interstate 94 in Wisconsin between mile markers 72 and 86. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && A Tornado Watch remains in effect until midnight CDT for west central Wisconsin. LAT...LON 4460 9141 4520 9141 4529 9093 4460 9093 TIME...MOT...LOC 0108Z 264DEG 50KT 4507 9150 4455 9150 HAIL...<.75IN WIND...60MPH $$ BORGHOFF
2 follow-up statements
134 WWUS53 KMPX 210123 SVSMPX Severe Weather Statement National Weather Service Twin Cities/Chanhassen MN 823 PM CDT THU SEP 20 2018 WIC017-035-210145- /O.CON.KMPX.SV.W.0156.000000T0000Z-180921T0145Z/ Chippewa WI-Eau Claire WI- 823 PM CDT THU SEP 20 2018 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT FOR EASTERN CHIPPEWA AND EAU CLAIRE COUNTIES... At 822 PM CDT, severe thunderstorms were located along a line extending from near Cornell to near Osseo, moving east at 55 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. These severe storms will be near... Cornell around 830 PM CDT. Fairchild around 840 PM CDT. Other locations impacted by these severe thunderstorms include Foster, Brackett, Holcombe, Lake Eau Claire County Park, Bateman, Ludington, Otter Lake, Jim Falls and Allen. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && A Tornado Watch remains in effect until midnight CDT for west central Wisconsin. LAT...LON 4460 9141 4521 9135 4529 9093 4460 9093 TIME...MOT...LOC 0122Z 253DEG 50KT 4514 9124 4462 9124 HAIL...<.75IN WIND...60MPH $$ BORGHOFF
260
WWUS53 KMPX 210136
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
836 PM CDT THU SEP 20 2018
WIC017-035-210146-
/O.EXP.KMPX.SV.W.0156.000000T0000Z-180921T0145Z/
Chippewa WI-Eau Claire WI-
836 PM CDT THU SEP 20 2018
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CHIPPEWA AND EAU
CLAIRE COUNTIES WILL EXPIRE AT 845 PM CDT...
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.
A Tornado Watch remains in effect until midnight CDT for west central
Wisconsin.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
The Twin Cities.
LAT...LON 4460 9141 4521 9135 4529 9093 4460 9093
TIME...MOT...LOC 0136Z 264DEG 50KT 4516 9098 4464 9098
$$
BORGHOFFThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 7:05 PM CDT | Special Weather Statement | MPX | Barron, Polk | 3 hr |
| Sep 20, 7:13 PM CDT | Tornado Warning | MPX | Dunn, Pepin, Pierce | 36 min |
| Sep 20, 7:37 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Dunn, Eau Claire, Pepin, Saint Croix | 38 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2018Every severe thunderstorm warning in 2018
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.