Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 53, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 24, 2021, 2:03 AM CDT for Polk County, Saint Croix County, Wisconsin; Chisago County, Washington County, Minnesota. It was in force for 25 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 24, 2021, 2:03 AM CDT (07:03 UTC)
- Expired
- Jul 24, 2021, 2:28 AM CDT
- In force
- 25 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 07:03 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 nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 7.1 hours before the alert went out and 92 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
- 2540 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1098 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 124 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.4
The text
As transmitted.
510
WUUS53 KMPX 240703
SVRMPX
MNC025-163-WIC095-109-240745-
/O.NEW.KMPX.SV.W.0053.210724T0703Z-210724T0745Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
203 AM CDT Sat Jul 24 2021
The National Weather Service in the Twin Cities has issued a
* Severe Thunderstorm Warning for...
Southeastern Chisago County in east central Minnesota...
Northern Washington County in east central Minnesota...
Northern St. Croix County in west central Wisconsin...
South central Polk County in northwestern Wisconsin...
* Until 245 AM CDT.
* At 202 AM CDT, a severe thunderstorm was located near Hugo, or 20
miles northeast of St. Paul, moving east at 40 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.
* This severe thunderstorm will be near...
Scandia around 210 AM CDT.
Somerset and Osceola around 215 AM CDT.
New Richmond around 220 AM CDT.
Other locations in the path of this severe thunderstorm include Star
Prairie, Amery and Clear Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4515 9222 4511 9291 4523 9300 4549 9245
TIME...MOT...LOC 0702Z 255DEG 33KT 4518 9286
HAIL...1.00IN
WIND...60MPH
$$
TDH2 follow-up statements
545 WWUS53 KMPX 240718 SVSMPX Severe Weather Statement National Weather Service Twin Cities/Chanhassen MN 218 AM CDT Sat Jul 24 2021 MNC025-163-WIC095-109-240745- /O.CON.KMPX.SV.W.0053.000000T0000Z-210724T0745Z/ Chisago MN-Washington MN-St. Croix WI-Polk WI- 218 AM CDT Sat Jul 24 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 AM CDT FOR SOUTHEASTERN CHISAGO...NORTHEASTERN WASHINGTON...NORTHERN ST. CROIX AND SOUTH CENTRAL POLK COUNTIES... At 217 AM CDT, a severe thunderstorm was located 6 miles north of Somerset, or 24 miles north of River Falls, moving east at 40 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Star Prairie, Amery and Clear Lake. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4515 9222 4513 9267 4525 9295 4549 9245 TIME...MOT...LOC 0717Z 255DEG 33KT 4522 9266 HAIL...0.75IN WIND...60MPH $$ TDH
465
WWUS53 KMPX 240728
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
228 AM CDT Sat Jul 24 2021
MNC025-163-WIC095-109-240737-
/O.CAN.KMPX.SV.W.0053.000000T0000Z-210724T0745Z/
Chisago MN-Washington MN-St. Croix WI-Polk WI-
228 AM CDT Sat Jul 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CHISAGO...
NORTHEASTERN WASHINGTON...NORTHERN ST. CROIX AND SOUTH CENTRAL POLK
COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds and
heavy rain are still possible with this thunderstorm.
LAT...LON 4515 9222 4513 9267 4525 9295 4549 9245
TIME...MOT...LOC 0726Z 255DEG 33KT 4524 9252
$$
TDHThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 2:32 AM CDT | Special Weather Statement | MPX | Polk | 43 min |
| Jul 24, 12:03 AM CDT | Special Weather Statement | MPX | Stevens | 27 min |
| Jul 24, 12:36 AM CDT | Special Weather Statement | MPX | Swift | 24 min |
| Jul 24, 1:07 AM CDT | Special Weather Statement | MPX | Pope | 23 min |
| Jul 24, 1:09 AM CDT | Special Weather Statement | MPX | Douglas | 36 min |
| Jul 24, 1:37 AM CDT | Severe Thunderstorm Warning | MPX | Morrison, Stearns, Todd | 38 min |
| Jul 24, 1:46 AM CDT | Special Weather Statement | MPX | Anoka | 44 min |
| Jul 24, 1:50 AM CDT | Special Weather Statement | MPX | Douglas, Todd | 40 min |
| Jul 24, 2:16 AM CDT | Special Weather Statement | MPX | Benton, Mille Lacs | 44 min |
| Jul 24, 2:19 AM CDT | Special Weather Statement | MPX | Morrison | 26 min |
| Jul 24, 2:27 AM CDT | Special Weather Statement | MPX | Chisago, Isanti | 33 min |
| Jul 24, 3:06 AM CDT | Special Weather Statement | MPX | Kanabec | 24 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2021Severe Thunderstorm Warnings in Minnesota, 2021Every severe thunderstorm warning in 2021
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.