Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 95, NWS Twin Cities, MN

June 30, 2017Blue Earth County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 30, 2017, 8:56 PM CDT for Blue Earth 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: Jun 30, 2017, 8:56 PM CDT (01:56 UTC)
Expired: Jun 30, 2017, 9:30 PM CDT
In force: 34 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

County Blue Earth County, MN

The radar

The Minneapolis radar (KMPX), 85 km from the middle of the area, began a volume at 01:59 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, 1.9 hours before the alert went out and 84 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: 337 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 1484 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

775 
WUUS53 KMPX 010156
SVRMPX
MNC013-010230-
/O.NEW.KMPX.SV.W.0095.170701T0156Z-170701T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
856 PM CDT FRI JUN 30 2017

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Northeastern Blue Earth County in south central Minnesota...

* Until 930 PM CDT

* At 856 PM CDT, a severe thunderstorm was located over Eagle Lake,
  or near Mankato, moving southeast at 15 mph.

  HAZARD...Half dollar size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Damage to vehicles is expected. 

* This severe thunderstorm will be near,
  Eagle Lake around 900 PM CDT. 
  St. Clair around 920 PM CDT. 

This includes U.S. Highway 14 between mile markers 136 and 142.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

&&

LAT...LON 4412 9398 4417 9395 4418 9378 4402 9380
TIME...MOT...LOC 0156Z 297DEG 12KT 4414 9393 

HAIL...1.25IN
WIND...<50MPH
 
$$

JPC

1 follow-up statement

740 
WWUS53 KMPX 010220
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
920 PM CDT FRI JUN 30 2017

MNC013-010230-
/O.EXP.KMPX.SV.W.0095.000000T0000Z-170701T0230Z/
Blue Earth MN-
920 PM CDT FRI JUN 30 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BLUE EARTH COUNTY
WILL EXPIRE AT 930 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.

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

LAT...LON 4412 9398 4417 9395 4418 9378 4402 9380
TIME...MOT...LOC 0220Z 297DEG 12KT 4411 9384 

$$

JPC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 7:15 PM CDT	Special Weather Statement	MPX	McLeod	45 min
Jun 30, 7:21 PM CDT	Special Weather Statement	MPX	Isanti	39 min
Jun 30, 8:28 PM CDT	Special Weather Statement	MPX	Isanti	62 min
Jun 30, 8:50 PM CDT	Special Weather Statement	MPX	Blue Earth	40 min
Jun 30, 9:23 PM CDT	Special Weather Statement	MPX	Isanti	37 min
Jun 30, 9:38 PM CDT	Special Weather Statement	MPX	Hennepin	52 min
Jun 30, 10:26 PM CDT	Special Weather Statement	MPX	Faribault	34 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2017 Every 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.