Alert archive / Minnesota / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 87, NWS Twin Cities, MN

July 12, 2019McLeod County, Sibley County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 12, 2019, 12:20 PM CDT for McLeod County, Sibley County, Minnesota. It was in force for 25 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: Jul 12, 2019, 12:20 PM CDT (17:20 UTC)
Expired: Jul 12, 2019, 12:45 PM CDT
In force: 25 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties McLeod County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 73 km from the middle of the area, began a volume at 17:21 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
Jul 12, 12:45 PM CDT	TSTM WND DMG	Gaylord, MN	CORRECTS TIME ON PREVIOUS TSTM WND DMG REPORT FROM GAYLORD. 20 FOOT TALL TREE SNAPPED, FELL AND CRUSHED MINIVAN IN PARKING LOT.

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, 5.3 hours before the alert went out and 71 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: 1558 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 198 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

813 
WUUS53 KMPX 121720
SVRMPX
MNC085-143-121745-
/O.NEW.KMPX.SV.W.0087.190712T1720Z-190712T1745Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
1220 PM CDT Fri Jul 12 2019

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Northwestern Sibley County in central Minnesota...
  Southern McLeod County in central Minnesota...

* Until 1245 PM CDT.

* At 1220 PM CDT, a severe thunderstorm was located near Stewart, or
  18 miles south of Hutchinson, moving east at 60 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Glencoe, Gaylord, Winthrop, Brownton, Stewart, Sumter, New Auburn
  and Fernando.

This includes U.S. Highway 212 between mile markers 102 and 122.
 
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.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4457 9463 4471 9463 4472 9460 4471 9450
      4473 9449 4479 9410 4453 9410
TIME...MOT...LOC 1720Z 269DEG 53KT 4464 9450 

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

CTG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 10:20 AM CDT	Special Weather Statement	MPX	Yellow Medicine	40 min
Jul 12, 10:51 AM CDT	Special Weather Statement	MPX	Yellow Medicine	39 min
Jul 12, 11:15 AM CDT	Severe Thunderstorm Warning	MPX	Redwood, Yellow Medicine	30 min
Jul 12, 11:24 AM CDT	Special Weather Statement	MPX	Yellow Medicine	36 min
Jul 12, 11:46 AM CDT	Special Weather Statement	MPX	Renville	44 min
Jul 12, 12:27 PM CDT	Special Weather Statement	MPX	Sibley	33 min
Jul 12, 12:30 PM CDT	Special Weather Statement	MPX	McLeod	30 min
Jul 12, 12:40 PM CDT	Severe Thunderstorm Warning	MPX	Carver, McLeod, Scott, Sibley	35 min
Jul 12, 12:50 PM CDT	Special Weather Statement	MPX	Carver	40 min
Jul 12, 1:05 PM CDT	Special Weather Statement	MPX	Le Sueur	25 min
Jul 12, 1:12 PM CDT	Special Weather Statement	MPX	Dakota, Hennepin, Scott	48 min
Jul 12, 1:16 PM CDT	Special Weather Statement	MPX	Rice	29 min
Jul 12, 1:26 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Scott	34 min
Jul 12, 1:38 PM CDT	Special Weather Statement	MPX	Ramsey, Washington	37 min
Jul 12, 1:43 PM CDT	Special Weather Statement	MPX	Goodhue	47 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2019 Every severe thunderstorm warning in 2019

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.