Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 94, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 12, 2018, 5:18 PM CDT for Polk County, Saint Croix County, Wisconsin; Chisago County, Washington County, Minnesota. It was in force for 27 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
- Jul 12, 2018, 5:18 PM CDT (22:18 UTC)
- Expired
- Jul 12, 2018, 5:45 PM CDT
- In force
- 27 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Chisago County, MN, Washington County, MN, Polk County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 89 km from the middle of the area, began a volume at 22:20 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 |
|---|---|---|---|
| Jul 12, 5:04 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 10.3 hours before the alert went out and 91 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
- 745 J/kg
- Mixed-layer CIN
- -244 J/kg
- Mixed-layer LCL
- 1291 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 387 m²/s²
- 0-3 km storm-relative helicity
- 437 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.3
The text
As transmitted.
312
WUUS53 KMPX 122218
SVRMPX
MNC025-163-WIC095-109-122245-
/O.NEW.KMPX.SV.W.0094.180712T2218Z-180712T2245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
518 PM CDT THU JUL 12 2018
The National Weather Service in The Twin Cities has issued a
* Severe Thunderstorm Warning for...
Southeastern Chisago County in east central Minnesota...
Northeastern Washington County in east central Minnesota...
Northern St. Croix County in west central Wisconsin...
Southeastern Polk County in northwestern Wisconsin...
* Until 545 PM CDT.
* At 517 PM CDT, a severe thunderstorm was located over East
Farmington, or 28 miles north of River Falls, moving east at 25
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Forest Lake, Hugo, New Richmond, Scandia, Amery, Somerset, Osceola,
Clear Lake, Dresser, Star Prairie, Grant and Cylon.
This includes U.S. Highway 61 near mile marker 165.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4501 9229 4513 9294 4535 9288 4540 9227
TIME...MOT...LOC 2217Z 272DEG 20KT 4527 9271
HAIL...1.00IN
WIND...60MPH
$$1 follow-up statement
965
WWUS53 KMPX 122236
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
536 PM CDT THU JUL 12 2018
MNC025-163-122245-
/O.CAN.KMPX.SV.W.0094.000000T0000Z-180712T2245Z/
Chisago MN-Washington MN-
536 PM CDT THU JUL 12 2018
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CHISAGO AND
NORTHEASTERN WASHINGTON COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until midnight CDT for
east central Minnesota...and northwestern and west central Wisconsin.
LAT...LON 4520 9227 4501 9229 4510 9276 4511 9274
4515 9276 4530 9275 4533 9270 4535 9269
4540 9227
TIME...MOT...LOC 2235Z 280DEG 19KT 4523 9256
$$
WIC095-109-122245-
/O.CON.KMPX.SV.W.0094.000000T0000Z-180712T2245Z/
St. Croix WI-Polk WI-
536 PM CDT THU JUL 12 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR NORTHERN ST. CROIX AND SOUTHEASTERN POLK COUNTIES...
At 535 PM CDT, a severe thunderstorm was located over Huntington, or
25 miles north of River Falls, moving east at 20 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
New Richmond, Amery, Somerset, Osceola, Clear Lake, Star Prairie,
Cylon, Deer Park, Osceola Airport, Huntington, Range and Wanderoos.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4520 9227 4501 9229 4510 9276 4511 9274
4515 9276 4530 9275 4533 9270 4535 9269
4540 9227
TIME...MOT...LOC 2235Z 280DEG 19KT 4523 9256
HAIL...0.75IN
WIND...60MPH
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 7:25 AM CDT | Special Weather Statement | MPX | Barron, Polk | 2 hr |
| Jul 12, 11:44 AM CDT | Special Weather Statement | MPX | Polk | 31 min |
| Jul 12, 4:52 PM CDT | Special Weather Statement | MPX | Polk | 53 min |
| Jul 12, 6:11 PM CDT | Special Weather Statement | MPX | Barron | 49 min |
| Jul 12, 6:29 PM CDT | Special Weather Statement | MPX | Barron | 46 min |
| Jul 12, 6:33 PM CDT | Special Weather Statement | MPX | Saint Croix | 42 min |
| Jul 12, 6:44 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Chippewa, Rusk | 46 min |
| Jul 12, 6:51 PM CDT | Special Weather Statement | MPX | Barron, Rusk | 84 min |
| Jul 12, 6:57 PM CDT | Flash Flood Warning | MPX | Barron | 3 hr |
| Jul 12, 4:37 AM CDT | Special Weather Statement | MPX | Kanabec | 113 min |
| Jul 12, 6:46 AM CDT | Special Weather Statement | MPX | Kanabec | 3 hr |
| Jul 12, 7:06 AM CDT | Flash Flood Warning | MPX | Kanabec, Mille Lacs | 3 hr |
| Jul 12, 10:26 AM CDT | Areal Flood Warning | MPX | Kanabec, Mille Lacs | 6 hr |
| Jul 12, 10:43 AM CDT | Special Weather Statement | MPX | Isanti, Sherburne | 32 min |
| Jul 12, 11:16 AM CDT | Special Weather Statement | MPX | Chisago | 29 min |
| Jul 12, 2:42 PM CDT | Flash Flood Watch | MPX | Blue Earth, Brown, Faribault, Martin, Nicollet, Redwood and 1 more | 16 hr |
| Jul 12, 4:38 PM CDT | Special Weather Statement | MPX | Anoka | 52 min |
| Jul 12, 4:43 PM CDT | Special Weather Statement | MPX | Hennepin | 47 min |
| Jul 12, 4:46 PM CDT | Special Weather Statement | MPX | Redwood | 74 min |
| Jul 12, 5:10 PM CDT | Special Weather Statement | MPX | Brown, Carver, Hennepin, McLeod, Ramsey, Sibley | 65 min |
| Jul 12, 5:27 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Hennepin | 33 min |
| Jul 12, 5:43 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Scott | 47 min |
| Jul 12, 5:54 PM CDT | Special Weather Statement | MPX | Ramsey | 51 min |
| Jul 12, 6:02 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Hennepin | 43 min |
| Jul 12, 6:14 PM CDT | Special Weather Statement | MPX | Brown | 46 min |
| Jul 12, 6:27 PM CDT | Special Weather Statement | MPX | Brown | 93 min |
| Jul 12, 6:40 PM CDT | Special Weather Statement | MPX | Dakota | 50 min |
| Jul 12, 6:47 PM CDT | Severe Thunderstorm Warning | MPX | Dakota | 31 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2018Severe Thunderstorm Warnings in Minnesota, 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.