Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 16, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 15, 2021, 5:27 PM CDT for Saint Croix County, Wisconsin. It was in force for 33 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
- May 15, 2021, 5:27 PM CDT (22:27 UTC)
- Expired
- May 15, 2021, 6:00 PM CDT
- In force
- 33 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 94 km from the middle of the area, began a volume at 22:27 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 12:00Z, 10.5 hours before the alert went out and 97 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
- 894 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
948 WUUS53 KMPX 152227 SVRMPX WIC109-152300- /O.NEW.KMPX.SV.W.0016.210515T2227Z-210515T2300Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Twin Cities/Chanhassen MN 527 PM CDT Sat May 15 2021 The National Weather Service in the Twin Cities has issued a * Severe Thunderstorm Warning for... Southeastern St. Croix County in west central Wisconsin... * Until 600 PM CDT. * At 527 PM CDT, a severe thunderstorm was located over Hammond, or 12 miles northeast of River Falls, moving southeast at 15 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * This severe thunderstorm will be near... Woodville around 545 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. If on or near a lake or river, get away from the water and move indoors or inside a vehicle. Remember, lightning can strike out to 15 miles from the parent thunderstorm. If you can hear thunder, you are close enough to be struck by lightning. Move to safe shelter now! Do not be caught on the water in a thunderstorm. && LAT...LON 4486 9242 4497 9247 4499 9233 4486 9221 TIME...MOT...LOC 2227Z 336DEG 14KT 4498 9243 HAIL...1.00IN WIND...<50MPH $$ ETA
1 follow-up statement
899
WWUS53 KMPX 152250
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
550 PM CDT Sat May 15 2021
WIC109-152300-
/O.CON.KMPX.SV.W.0016.000000T0000Z-210515T2300Z/
St. Croix WI-
550 PM CDT Sat May 15 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR SOUTHEASTERN ST. CROIX COUNTY...
At 549 PM CDT, a severe thunderstorm was located near Baldwin, or 11
miles east of River Falls, moving southeast at 15 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
This severe thunderstorm will remain over mainly rural areas of
southeastern St. Croix County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.
If on or near a lake or river, get away from the water and move
indoors or inside a vehicle. remember, lightning can strike out to
15 miles from the parent thunderstorm. If you can hear thunder, you
are close enough to be struck by lightning. Move to safe shelter
now! Do not be caught on the water in a thunderstorm.
&&
LAT...LON 4486 9237 4490 9236 4491 9226 4489 9224
4486 9222
TIME...MOT...LOC 2249Z 336DEG 14KT 4490 9238
HAIL...1.00IN
WIND...<50MPH
$$
ETAThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 3:48 PM CDT | Special Weather Statement | MPX | Polk | 27 min |
| May 15, 4:07 PM CDT | Severe Thunderstorm Warning | MPX | Polk | 23 min |
| May 15, 4:29 PM CDT | Severe Thunderstorm Warning | MPX | Polk | 22 min |
| May 15, 4:50 PM CDT | Special Weather Statement | MPX | Saint Croix | 40 min |
| May 15, 5:07 PM CDT | Severe Thunderstorm Warning | MPX | Saint Croix | 23 min |
| May 15, 5:44 PM CDT | Severe Thunderstorm Warning | MPX | Pierce | 46 min |
| May 15, 6:28 PM CDT | Severe Thunderstorm Warning | MPX | Pepin, Pierce | 62 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 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.