Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 52, NWS Twin Cities, MN

July 11, 2020Blue Earth County, Brown County, Nicollet County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 11, 2020, 2:42 PM CDT for Blue Earth County, Brown County, Nicollet County, Minnesota. It was in force for 33 min. 3 reports 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 11, 2020, 2:42 PM CDT (19:42 UTC)
Expired: Jul 11, 2020, 3:15 PM CDT
In force: 33 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Blue Earth County, MN, Brown County, MN, Nicollet County, MN

The radar

The Minneapolis radar (KMPX), 104 km from the middle of the area, began a volume at 19:46 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 11, 2:55 PM CDT	TSTM WND DMG	Courtland, MN	4 INCH DIAMETER TREE BRANCHES DOWN. TIME ESTIMATED.
Jul 11, 2:55 PM CDT	TSTM WND GST 45	5 Sse Searles, MN	MESONET STATION DW7572 HANSKA. TIME ESTIMATED.
Jul 11, 3:10 PM CDT	TSTM WND GST 45	5 Se Searles, MN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 11, 1:10 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.7 hours before the alert went out and 102 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: 52 J/kg
Mixed-layer CIN: -178 J/kg
Mixed-layer LCL: 1331 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

343 
WUUS53 KMPX 111942
SVRMPX
MNC013-015-103-112015-
/O.NEW.KMPX.SV.W.0052.200711T1942Z-200711T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
242 PM CDT Sat Jul 11 2020

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Eastern Brown County in south central Minnesota...
  Northwestern Blue Earth County in south central Minnesota...
  Central Nicollet County in south central Minnesota...

* Until 315 PM CDT.

* At 242 PM CDT, a severe thunderstorm was located over New Ulm,
  moving southeast 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...
  New Ulm, Sleepy Eye, Courtland, Hanska, Evan, Klossner, Essig, St
  George, New Ulm Airport and Searles.

This includes U.S. Highway 14 between mile markers 85 and 114.
 
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 4411 9465 4437 9487 4438 9486 4446 9458
      4445 9447 4422 9423 4410 9451
TIME...MOT...LOC 1942Z 307DEG 32KT 4433 9448 

HAIL...1.00IN
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 11, 5:32 AM CDT	Severe Thunderstorm Warning	MPX	Steele	28 min
Jul 11, 10:43 AM CDT	Special Weather Statement	MPX	Douglas, Pope, Stevens	47 min
Jul 11, 11:17 AM CDT	Severe Thunderstorm Warning	MPX	Swift	43 min
Jul 11, 11:34 AM CDT	Special Weather Statement	MPX	Todd	56 min
Jul 11, 12:00 PM CDT	Special Weather Statement	MPX	Kandiyohi	45 min
Jul 11, 12:32 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Renville	58 min
Jul 11, 12:39 PM CDT	Special Weather Statement	MPX	Meeker	51 min
Jul 11, 12:57 PM CDT	Special Weather Statement	MPX	Todd	33 min
Jul 11, 1:05 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Meeker, Renville, Sibley	55 min
Jul 11, 1:20 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Redwood, Renville, Yellow Medicine	40 min
Jul 11, 1:28 PM CDT	Severe Thunderstorm Warning	MPX	Redwood	47 min
Jul 11, 1:48 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Sibley	57 min
Jul 11, 2:01 PM CDT	Special Weather Statement	MPX	Pope	44 min
Jul 11, 2:15 PM CDT	Severe Thunderstorm Warning	MPX	Pope	45 min
Jul 11, 2:20 PM CDT	Severe Thunderstorm Warning	MPX	Martin	40 min
Jul 11, 2:23 PM CDT	Severe Thunderstorm Warning	MPX	Nicollet, Sibley	52 min
Jul 11, 2:57 PM CDT	Severe Thunderstorm Warning	MPX	Martin, Watonwan	48 min
Jul 11, 3:03 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Le Sueur, Nicollet	42 min
Jul 11, 3:10 PM CDT	Tornado Warning	MPX	Blue Earth, Nicollet	20 min
Jul 11, 3:26 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Martin	49 min
Jul 11, 3:32 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Freeborn, Steele, Waseca	43 min
Jul 11, 4:05 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn, Steele, Waseca	55 min
Jul 11, 4:17 PM CDT	Special Weather Statement	MPX	Faribault	58 min
Jul 11, 4:35 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	25 min
Jul 11, 6:16 PM CDT	Special Weather Statement	MPX	Hennepin	59 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2020 Every severe thunderstorm warning in 2020

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.