Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 166, NWS Sioux Falls, SD

July 19, 2017Lincoln County, Lyon County, Minnesota; Brookings County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 19, 2017, 1:15 PM CDT for Lincoln County, Lyon County, Minnesota; Brookings County, South Dakota. It was in force for 45 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 19, 2017, 1:15 PM CDT (18:15 UTC)
Expired: Jul 19, 2017, 2:00 PM CDT
In force: 45 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Lincoln County, MN, Lyon County, MN, Brookings County, SD

The radar

The Sioux Falls radar (KFSD), 90 km from the middle of the area, began a volume at 18:17 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 19, 1:30 PM CDT	TSTM WND DMG	10 Ese White, SD	LARGE BARN AND GRAIN BIN DESTROYED. POWER POLES AND SEVERAL TREES BLOWN OVER. REPORT VIA SOCIAL MEDIA.
Jul 19, 1:31 PM CDT	TSTM WND GST 61	1 Wnw Lake Benton, MN
Jul 19, 1:45 PM CDT	TSTM WND DMG	Lake Benton, MN	TREE BRANCHES DOWN.

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 19, 12:36 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 19, 10:24 AM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 6.3 hours before the alert went out and 181 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: 1451 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

612 
WUUS53 KFSD 191815
SVRFSD
MNC081-083-SDC011-191900-
/O.NEW.KFSD.SV.W.0166.170719T1815Z-170719T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
115 PM CDT WED JUL 19 2017

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Southwestern Lyon County in southwestern Minnesota...
  Lincoln County in southwestern Minnesota...
  Eastern Brookings County in east central South Dakota...

* Until 200 PM CDT

* At 115 PM CDT, a severe thunderstorm was located 8 miles north of
  Elkton, or 16 miles east of Brookings, moving east at 50 mph.

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

  SOURCE...Radar indicated. 

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

* This severe thunderstorm will be near, 
  Lake Benton around 125 PM CDT. 
  Arco around 130 PM CDT. 
  Tyler around 135 PM CDT. 
  Russell around 145 PM CDT. 
  Camden State Park around 150 PM CDT. 

Other locations impacted by this severe thunderstorm include Bushnell
and Lynd.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4420 9585 4420 9688 4450 9687 4451 9585
TIME...MOT...LOC 1815Z 267DEG 42KT 4435 9646 

HAIL...0.88IN
WIND...60MPH
 
$$

MJF

1 follow-up statement

095 
WWUS53 KFSD 191835
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
135 PM CDT WED JUL 19 2017

MNC081-083-SDC011-191900-
/O.CON.KFSD.SV.W.0166.000000T0000Z-170719T1900Z/
Lyon MN-Lincoln MN-Brookings SD-
135 PM CDT WED JUL 19 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CDT
FOR SOUTHWESTERN LYON...LINCOLN AND SOUTHEASTERN BROOKINGS
COUNTIES...

At 134 PM CDT, a severe thunderstorm was located 7 miles southwest of
Ivanhoe, or 22 miles east of Brookings, moving east at 35 mph.

This is a very dangerous storm.

HAZARD...80 mph wind gusts and nickel size hail. 

SOURCE...Radar indicated. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be heavily damaged. Expect 
         considerable damage to roofs, windows, and vehicles. 
         Extensive tree damage and power outages are likely. 

This severe storm will be near...
  Ivanhoe around 140 PM CDT. 
  Arco around 145 PM CDT. 
  Tyler around 150 PM CDT. 
  Russell and Camden State Park around 200 PM CDT. 

Other locations impacted by this severe thunderstorm include Lynd.

The wind signature of this storm is strenghening. Persons in west 
central Lincoln county Minnesota need to take shelter immediately.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4420 9585 4420 9656 4450 9653 4451 9585
TIME...MOT...LOC 1834Z 268DEG 32KT 4438 9635 

HAIL...0.88IN
WIND...80MPH
 
$$

MJF

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 19, 1:44 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Lyon	31 min
Jul 19, 2:34 PM CDT	Severe Thunderstorm Warning	FSD	Cottonwood	26 min
Jul 19, 10:53 AM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld, Sanborn	52 min
Jul 19, 11:45 AM CDT	Severe Thunderstorm Warning	FSD	Beadle, Kingsbury, Miner, Sanborn	45 min
Jul 19, 12:18 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Kingsbury, Lake, Miner	27 min
Jul 19, 4:07 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	53 min
Jul 19, 4:45 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Gregory	45 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2017 Severe Thunderstorm Warnings in South Dakota, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.