Alert archive / Minnesota / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 1, NWS Twin Cities, MN

April 13, 2018Blue Earth County, Brown County, Watonwan County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 13, 2018, 9:01 AM CDT for Blue Earth County, Brown County, Watonwan County, Minnesota. It was in force for 14 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: Apr 13, 2018, 9:01 AM CDT (14:01 UTC)
Expired: Apr 13, 2018, 9:15 AM CDT
In force: 14 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Blue Earth County, MN, Brown County, MN, Watonwan County, MN

The radar

The Minneapolis radar (KMPX), 108 km from the middle of the area, began a volume at 14:05 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, 2.0 hours before the alert went out and 106 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 723 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: -62 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

175 
WWUS53 KMPX 131401 CCA
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
901 AM CDT FRI APR 13 2018

MNC013-015-165-131415-
/O.COR.KMPX.SV.W.0001.000000T0000Z-180413T1415Z/
Brown MN-Blue Earth MN-Watonwan MN-
901 AM CDT FRI APR 13 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 AM CDT
FOR BROWN...NORTHWESTERN BLUE EARTH AND NORTHWESTERN WATONWAN
COUNTIES...

At 859 AM CDT, a severe thunderstorm was located 7 miles south of
Sleepy Eye, or 13 miles southwest of New Ulm, moving northeast at 60 
mph. A trained spotter reported 1 to 2 inches of small hail covered 
in the town of Comfrey with this storm. 

HAZARD...60 mph wind gusts and penny size hail. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

This severe storm will be near...
  Hanska around 905 AM CDT. 
  New Ulm and Courtland around 915 AM CDT. 

Other locations impacted by this severe thunderstorm include
Sveadahl, Essig, New Ulm Airport, Cobden, Darfur and Searles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
The Twin Cities.

&&

LAT...LON 4398 9486 4411 9487 4411 9507 4440 9472
      4433 9445 4427 9441 4426 9433 4421 9424
      4422 9422 4420 9422
TIME...MOT...LOC 1350Z 239DEG 51KT 4414 9480 

HAIL...0.75IN
WIND...60MPH
 
$$

JLT

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 12, 9:34 PM CDT	Winter Storm Warning	MPX	Anoka, Benton, Blue Earth, Brown, Carver, Chisago and 24 more	3 days
Apr 13, 8:26 AM CDT	Special Weather Statement	MPX	Brown, Redwood	64 min
Apr 13, 10:14 AM CDT	Special Weather Statement	MPX	Dakota, Rice	46 min
Apr 13, 11:15 AM CDT	River Flood Warning	MPX	Brown	48 hr
Apr 13, 12:36 PM CDT	Special Weather Statement	MPX	Yellow Medicine	39 min
Apr 13, 1:21 PM CDT	Special Weather Statement	MPX	Redwood	24 min
Apr 13, 3:12 PM CDT	Winter Weather Advisory	MPX	Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 31 more	57 hr
Apr 13, 3:20 PM CDT	Special Weather Statement	MPX	Steele	25 min
Apr 13, 3:57 PM CDT	Special Weather Statement	MPX	Freeborn	33 min
Apr 13, 6:24 PM CDT	Special Weather Statement	MPX	Martin, Watonwan	51 min
Apr 13, 6:44 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Watonwan	31 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2018 Every 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.