Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 187, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 18, 2017, 7:26 PM CDT for Brown County, Martin County, Watonwan County, Minnesota. It was in force for 34 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
- Aug 18, 2017, 7:26 PM CDT (00:26 UTC)
- Expired
- Aug 18, 2017, 8:00 PM CDT
- In force
- 34 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Brown County, MN, Martin County, MN, Watonwan County, MN
The radar
The Minneapolis radar (KMPX), 142 km from the middle of the area, began a volume at 00:28 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 |
|---|---|---|---|
| Aug 18, 4:51 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.4 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
- 13 J/kg
- Mixed-layer CIN
- -140 J/kg
- Mixed-layer LCL
- 1494 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
556
WUUS53 KMPX 190026
SVRMPX
MNC015-091-165-190100-
/O.NEW.KMPX.SV.W.0187.170819T0026Z-170819T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
726 PM CDT FRI AUG 18 2017
The National Weather Service in The Twin Cities has issued a
* Severe Thunderstorm Warning for...
Northwestern Martin County in south central Minnesota...
Southwestern Brown County in south central Minnesota...
Western Watonwan County in south central Minnesota...
* Until 800 PM CDT
* At 726 PM CDT, a severe thunderstorm was located over Delft, or 9
miles north of Windom, moving east at 45 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,
Butterfield around 745 PM CDT.
Other locations impacted by this severe thunderstorm include
Sveadahl, Odin and Darfur.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4379 9486 4411 9486 4411 9509 4416 9510
4420 9470 4377 9470
TIME...MOT...LOC 0026Z 281DEG 39KT 4400 9508
HAIL...1.00IN
WIND...60MPH
$$
AMK2 follow-up statements
614
WWUS53 KMPX 190049
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
749 PM CDT FRI AUG 18 2017
MNC015-190058-
/O.CAN.KMPX.SV.W.0187.000000T0000Z-170819T0100Z/
Brown MN-
749 PM CDT FRI AUG 18 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN BROWN COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled.
A severe thunderstorm watch remains in effect until 100 AM CDT for
south central Minnesota.
LAT...LON 4379 9486 4411 9486 4411 9470 4377 9470
TIME...MOT...LOC 0048Z 281DEG 39KT 4395 9475
$$
MNC091-165-190100-
/O.CON.KMPX.SV.W.0187.000000T0000Z-170819T0100Z/
Martin MN-Watonwan MN-
749 PM CDT FRI AUG 18 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR NORTHWESTERN MARTIN AND WESTERN WATONWAN COUNTIES...
At 748 PM CDT, a severe thunderstorm was located over Butterfield, or
19 miles east of Windom, moving east at 45 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 remain over mainly rural areas of
northwestern Martin and western Watonwan Counties, including the
following locations: Sveadahl, Odin and Darfur.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4379 9486 4411 9486 4411 9470 4377 9470
TIME...MOT...LOC 0048Z 281DEG 39KT 4395 9475
HAIL...1.00IN
WIND...60MPH
$$
AMK652
WWUS53 KMPX 190055
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
755 PM CDT FRI AUG 18 2017
MNC091-165-190105-
/O.EXP.KMPX.SV.W.0187.000000T0000Z-170819T0100Z/
Martin MN-Watonwan MN-
755 PM CDT FRI AUG 18 2017
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MARTIN AND
WESTERN WATONWAN COUNTIES WILL EXPIRE AT 800 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire.
A severe thunderstorm watch remains in effect until 100 AM CDT for
south central Minnesota.
LAT...LON 4379 9486 4411 9486 4411 9470 4377 9470
TIME...MOT...LOC 0055Z 281DEG 39KT 4394 9465
$$
AMKThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 7:02 PM CDT | Special Weather Statement | MPX | Cottonwood | 28 min |
| Aug 18, 8:30 PM CDT | Special Weather Statement | MPX | Martin | 30 min |
| Aug 18, 8:53 PM CDT | River Flood Warning | MPX | Redwood | 3 days |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2017Every severe thunderstorm warning in 2017
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.