Alert archive / Minnesota / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 8, NWS Twin Cities, MN

May 24, 2018Hennepin County, Wright County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 24, 2018, 6:55 PM CDT for Hennepin County, Wright County, Minnesota. It was in force for 20 min. 1 report 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: May 24, 2018, 6:55 PM CDT (23:55 UTC)
Expired: May 24, 2018, 7:15 PM CDT
In force: 20 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Hennepin County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 25 km from the middle of the area, began a volume at 23:57 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
May 24, 7:15 PM CDT	TSTM WND DMG	Maple Grove, MN	TREES DOWN. TIME 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, 11.9 hours before the alert went out and 25 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: 284 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 1325 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

215 
WUUS53 KMPX 242355
SVRMPX
MNC053-171-250015-
/O.NEW.KMPX.SV.W.0008.180524T2355Z-180525T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
655 PM CDT THU MAY 24 2018

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southeastern Wright County in central Minnesota...
  Northwestern Hennepin County in east central Minnesota...

* Until 715 PM CDT

* At 655 PM CDT, severe thunderstorms were located along a line
  extending from Rockford to Maple Plain to Mound, moving east at 35
  mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Law enforcement reports numerous trees and power lines 
           down across Carver county. 

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

* Severe thunderstorms will be near,
  Medina around 700 PM CDT. 
  Wayzata around 710 PM CDT. 
  Plymouth, Maple Grove, Minnetonka, St. Louis Park and Hopkins 
  around 715 PM CDT. 

Other locations impacted by these severe thunderstorms include
Loretto, Hanover, Greenfield, Medicine Lake, Long Lake, Dayton,
Hamel, Woodland, Deephaven and New Hope.

This includes U.S. Highway 12 between mile markers 134 and 140.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4521 9344 4504 9340 4494 9340 4493 9377
      4498 9377 4498 9386 4515 9389 4522 9345
TIME...MOT...LOC 2355Z 263DEG 28KT 4511 9373 4502 9368 4492 9367 

HAIL...<.75IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 1:09 AM CDT	Special Weather Statement	MPX	Kanabec	51 min
May 24, 3:22 PM CDT	Special Weather Statement	MPX	Yellow Medicine	23 min
May 24, 5:03 PM CDT	Special Weather Statement	MPX	Renville	27 min
May 24, 5:06 PM CDT	Severe Thunderstorm Warning	MPX	Renville	24 min
May 24, 5:28 PM CDT	Special Weather Statement	MPX	Renville	47 min
May 24, 6:17 PM CDT	Special Weather Statement	MPX	Carver	43 min
May 24, 6:21 PM CDT	Severe Thunderstorm Warning	MPX	Carver, McLeod, Sibley	39 min
May 24, 6:46 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin, Scott	29 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.