Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 12, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 27, 2021, 7:11 AM CDT for Martin County, Watonwan County, Minnesota. It was in force for 49 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
- Apr 27, 2021, 7:11 AM CDT (12:11 UTC)
- Expired
- Apr 27, 2021, 8:00 AM CDT
- In force
- 49 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 50.0 mph
Counties Martin County, MN, Watonwan County, MN
The radar
The Minneapolis radar (KMPX), 142 km from the middle of the area, began a volume at 12:12 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 |
|---|---|---|---|
| Apr 27, 7:20 AM CDT | HAIL 1 | 2 Sw Ormsby, MN | HAIL LASTED SEVERAL MINUTES AND WAS ACCOMPANIED BY STRONG WIND, WITH THE RAIN BLOWING SIDEWAYS. |
| Apr 27, 7:38 AM CDT | HAIL 1.25 | 6 Wsw Truman, MN | LOTS OF LARGE HAIL. HAIL WAS 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, 0.2 hours before the alert went out and 140 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
- 695 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- -21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
331
WUUS53 KMPX 271211
SVRMPX
MNC091-165-271300-
/O.NEW.KMPX.SV.W.0012.210427T1211Z-210427T1300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
711 AM CDT Tue Apr 27 2021
The National Weather Service in the Twin Cities has issued a
* Severe Thunderstorm Warning for...
Northern Martin County in south central Minnesota...
Southeastern Watonwan County in south central Minnesota...
* Until 800 AM CDT.
* At 711 AM CDT, a severe thunderstorm was located 6 miles west of
Trimont, or 11 miles northeast of Jackson In Jackson County, moving
east at 35 mph.
HAZARD...Half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
* This severe thunderstorm will be near...
Trimont around 720 AM CDT.
Truman and Lewisville around 750 AM CDT.
Other locations impacted by this severe thunderstorm include Ormsby,
Foxlake, Northrop, South Branch and Odin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4384 9485 4395 9437 4385 9436 4371 9435
4370 9485
TIME...MOT...LOC 1211Z 258DEG 30KT 4375 9484
HAIL...1.25IN
WIND...<50MPH
$$
MPG3 follow-up statements
132
WWUS53 KMPX 271230
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
730 AM CDT Tue Apr 27 2021
MNC091-165-271300-
/O.CON.KMPX.SV.W.0012.000000T0000Z-210427T1300Z/
Martin MN-Watonwan MN-
730 AM CDT Tue Apr 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 AM CDT
FOR NORTHEASTERN MARTIN AND SOUTHEASTERN WATONWAN COUNTIES...
At 730 AM CDT, a severe thunderstorm was located 6 miles northeast of
Trimont, or 13 miles northwest of Fairmont, moving east at 40 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
This severe storm will be near...
Truman and Lewisville around 745 AM CDT.
Other locations impacted by this severe thunderstorm include Ormsby,
Northrop and South Branch.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4395 9437 4385 9436 4373 9435 4373 9463
4386 9474
TIME...MOT...LOC 1230Z 256DEG 33KT 4381 9460
HAIL...1.00IN
WIND...<50MPH
$$
MPG150
WWUS53 KMPX 271241
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
741 AM CDT Tue Apr 27 2021
MNC091-165-271300-
/O.CON.KMPX.SV.W.0012.000000T0000Z-210427T1300Z/
Martin MN-Watonwan MN-
741 AM CDT Tue Apr 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 AM CDT
FOR NORTHEASTERN MARTIN AND SOUTHEASTERN WATONWAN COUNTIES...
At 741 AM CDT, a severe thunderstorm was located over Truman, or 13
miles north of Fairmont, moving east at 35 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
This severe storm will be near...
Lewisville around 745 AM CDT.
Other locations impacted by this severe thunderstorm include South
Branch.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4395 9437 4385 9436 4373 9435 4376 9455
4389 9461
TIME...MOT...LOC 1241Z 258DEG 30KT 4383 9448
HAIL...1.00IN
WIND...<50MPH
$$
MPG469
WWUS53 KMPX 271252
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
752 AM CDT Tue Apr 27 2021
MNC091-165-271301-
/O.EXP.KMPX.SV.W.0012.000000T0000Z-210427T1300Z/
Martin MN-Watonwan MN-
752 AM CDT Tue Apr 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MARTIN AND
SOUTHEASTERN WATONWAN COUNTIES WILL EXPIRE AT 800 AM CDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.
LAT...LON 4395 9437 4385 9436 4373 9435 4376 9455
4389 9461
TIME...MOT...LOC 1251Z 258DEG 30KT 4385 9438
$$
MPGThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 1:31 AM CDT | Special Weather Statement | MPX | Watonwan | 44 min |
| Apr 27, 7:05 AM CDT | Special Weather Statement | MPX | Martin | 40 min |
| Apr 27, 7:51 AM CDT | Special Weather Statement | MPX | Blue Earth | 39 min |
Nearby
Severe 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.