Alert archive / Minnesota / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 69, NWS Twin Cities, MN

June 16, 20184 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 16, 2018, 3:44 AM CDT for 4 counties in Minnesota. It was in force for 31 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 16, 2018, 3:44 AM CDT (08:44 UTC)
Expired: Jun 16, 2018, 4:15 AM CDT
In force: 31 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Blue Earth County, MN, Faribault County, MN, Freeborn County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 121 km from the middle of the area, began a volume at 08:48 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, 8.7 hours before the alert went out and 121 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: 2652 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 1748 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 14.4

Open this sounding in Storm Lab

The text

As transmitted.

563 
WUUS53 KMPX 160844
SVRMPX
MNC013-043-047-161-160915-
/O.NEW.KMPX.SV.W.0069.180616T0844Z-180616T0915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
344 AM CDT SAT JUN 16 2018

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Northwestern Freeborn County in south central Minnesota...
  Northeastern Faribault County in south central Minnesota...
  Southeastern Blue Earth County in south central Minnesota...
  Southwestern Waseca County in south central Minnesota...

* Until 415 AM CDT.

* At 343 AM CDT, a severe thunderstorm was located over Brush Creek,
  or 22 miles west of Albert Lea, moving northeast at 35 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.

* Locations impacted include...
  Wells, Minnesota Lake, Hartland, Freeborn, Waldorf, Easton, Brush
  Creek, Matawan and Baroda.

This includes Interstate 90 between mile markers 134 and 139.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4362 9380 4378 9398 4402 9373 4379 9343
TIME...MOT...LOC 0843Z 223DEG 30KT 4373 9381 

HAIL...1.00IN
WIND...60MPH
 
$$

AMK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 3:26 AM CDT	Special Weather Statement	MPX	Faribault	34 min
Jun 16, 4:56 AM CDT	Special Weather Statement	MPX	Blue Earth, Steele, Waseca	64 min
Jun 16, 6:08 AM CDT	Special Weather Statement	MPX	Blue Earth, Faribault, Le Sueur, Martin, Watonwan	67 min
Jun 16, 6:11 AM CDT	Special Weather Statement	MPX	Goodhue	64 min
Jun 16, 8:05 AM CDT	Special Weather Statement	MPX	Carver, Hennepin, Ramsey, Washington	55 min
Jun 16, 8:11 AM CDT	Severe Thunderstorm Warning	MPX	Douglas	49 min
Jun 16, 10:30 AM CDT	River Flood Warning	MPX	Carver	6 days
Jun 16, 2:50 PM CDT	Flash Flood Watch	MPX	Benton, Douglas, Kanabec, Mille Lacs, Morrison, Pope and 4 more	12 hr

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.