Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 182, NWS Sioux Falls, SD

July 25, 2017Lincoln County, Minnesota; Brookings County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 25, 2017, 4:09 PM CDT for Lincoln County, Minnesota; Brookings County, South Dakota. It was in force for 51 min. 2 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 25, 2017, 4:09 PM CDT (21:09 UTC)
Expired: Jul 25, 2017, 5:00 PM CDT
In force: 51 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 70.0 mph

Counties Lincoln County, MN, Brookings County, SD

The radar

The Sioux Falls radar (KFSD), 100 km from the middle of the area, began a volume at 21:13 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 25, 4:28 PM CDT	HAIL 1.5	5 Nnw White, SD	WELCOMED HEAVY RAIN, BUT NOT LIKING THE HAIL. WINDS FAIRLY CALM.
Jul 25, 4:45 PM CDT	TSTM WND GST 60	7 E White, SD	KNOCKED SOME SMALL TREES 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 25, 3:46 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 25, 3:22 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 9.2 hours before the alert went out and 162 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: 853 J/kg
Mixed-layer CIN: -568 J/kg
Mixed-layer LCL: 1011 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 234 m²/s²
0-3 km storm-relative helicity: 238 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

002 
WUUS53 KFSD 252109
SVRFSD
MNC081-SDC011-252200-
/O.NEW.KFSD.SV.W.0182.170725T2109Z-170725T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
409 PM CDT TUE JUL 25 2017

The National Weather Service in Sioux Falls has issued a

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

* Until 500 PM CDT

* At 409 PM CDT, a severe thunderstorm was located 7 miles southwest
  of Toronto, or 8 miles southeast of Estelline, moving east at 35
  mph.

  HAZARD...70 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings. 

* This severe thunderstorm will be near, 
  White around 420 PM CDT. 
  Hendricks around 435 PM CDT. 
  Ivanhoe around 450 PM CDT. 
  Arco around 500 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4426 9617 4439 9691 4454 9688 4454 9645
      4463 9645 4463 9609
TIME...MOT...LOC 2109Z 278DEG 31KT 4450 9676 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...70MPH
 
$$

Hanko

2 follow-up statements

454 
WWUS53 KFSD 252122
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
422 PM CDT TUE JUL 25 2017

MNC081-SDC011-252200-
/O.CON.KFSD.SV.W.0182.000000T0000Z-170725T2200Z/
Lincoln MN-Brookings SD-
422 PM CDT TUE JUL 25 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR LINCOLN AND NORTHEASTERN BROOKINGS COUNTIES...

At 421 PM CDT, a severe thunderstorm was located near White, or 15
miles northeast of Brookings, moving east at 35 mph.

HAZARD...70 mph wind gusts and ping pong ball size hail. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings. 

This severe storm will be near...
  Hendricks around 435 PM CDT. 
  Ivanhoe around 450 PM CDT. 
  Arco around 500 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4437 9680 4454 9675 4454 9645 4463 9645
      4463 9609 4426 9617
TIME...MOT...LOC 2121Z 278DEG 31KT 4448 9661 

TORNADO...POSSIBLE
HAIL...1.50IN
WIND...70MPH
 
$$

Hanko

377 
WWUS53 KFSD 252130
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
430 PM CDT TUE JUL 25 2017

MNC081-SDC011-252200-
/O.CON.KFSD.SV.W.0182.000000T0000Z-170725T2200Z/
Lincoln MN-Brookings SD-
430 PM CDT TUE JUL 25 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR LINCOLN AND NORTHEASTERN BROOKINGS COUNTIES...

At 429 PM CDT, a severe thunderstorm was located near Hendricks, or
17 miles northeast of Brookings, moving east at 35 mph.

HAZARD...70 mph wind gusts and ping pong ball size hail. 

SOURCE...Trained weather spotters. At 428 PM CDT ping pong sized 
         hail was reported 5 miles north northwest of White. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings. 

This severe storm will be near...
  Hendricks around 435 PM CDT. 
  Ivanhoe around 450 PM CDT. 
  Arco around 455 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4437 9680 4454 9675 4454 9645 4463 9645
      4463 9609 4426 9617
TIME...MOT...LOC 2129Z 278DEG 31KT 4447 9651 

TORNADO...POSSIBLE
HAIL...1.50IN
WIND...70MPH
 
$$

Hanko

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 4:12 PM CDT	Tornado Warning	FSD	Lincoln	33 min
Jul 25, 4:52 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Lyon, Pipestone	38 min
Jul 25, 4:34 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison, Hanson, Jerauld, Miner, Sanborn	41 min
Jul 25, 4:39 PM CDT	Tornado Warning	FSD	Brookings, Moody	36 min
Jul 25, 4:58 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Lake, Miner, Sanborn	47 min
Jul 25, 5:21 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Davison, Jerauld, Sanborn	39 min
Jul 25, 5:31 PM CDT	Severe Thunderstorm Warning	FSD	Kingsbury, Lake, Miner, Sanborn	44 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.