Alert archive / South Dakota / Tornado Warnings in 2015

Tornado Warning 7, NWS Aberdeen, SD

July 17, 2015Marshall County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jul 17, 2015, 5:12 PM CDT for Marshall County, South Dakota. It was in force for 33 min. 5 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 17, 2015, 5:12 PM CDT (22:12 UTC)
Expired: Jul 17, 2015, 5:45 PM CDT
In force: 33 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

County Marshall County, SD

The radar

The Aberdeen radar (KABR), 76 km from the middle of the area, began a volume at 22:13 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
Jul 17, 5:16 PM CDT	HAIL 2.5	6 E Britton, SD
Jul 17, 5:49 PM CDT	HAIL 1.25	4 Nw Roy Lake State Par, SD
Jul 17, 5:50 PM CDT	HAIL 1	8 Nw Lake City, SD
Jul 17, 5:52 PM CDT	HAIL 1.75	6 Nw Roy Lake State Par, SD
Jul 17, 5:55 PM CDT	HAIL 1	2 N Roy Lake State Park, SD

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 17, 3:43 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 10.2 hours before the alert went out and 121 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: 490 J/kg
Mixed-layer CIN: -181 J/kg
Mixed-layer LCL: 1592 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

032 
WFUS53 KABR 172212
TORABR
SDC091-172245-
/O.NEW.KABR.TO.W.0007.150717T2212Z-150717T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
512 PM CDT FRI JUL 17 2015

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN MARSHALL COUNTY IN NORTHEASTERN SOUTH DAKOTA...

* UNTIL 545 PM CDT
    
* AT 512 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR BRITTON...MOVING EAST AT 15 MPH.

  HAZARD...TORNADO AND GOLF BALL SIZE HAIL. 

  SOURCE...RADAR INDICATED ROTATION. 

  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT 
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. 
           DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR.  TREE 
           DAMAGE IS LIKELY. 

* THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  NORTHEASTERN MARSHALL COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4573 9738 4574 9771 4593 9786 4594 9780
      4593 9743
TIME...MOT...LOC 2212Z 249DEG 14KT 4578 9762 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

SD

3 follow-up statements

684 
WWUS53 KABR 172222
SVSABR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
522 PM CDT FRI JUL 17 2015

SDC091-172245-
/O.CON.KABR.TO.W.0007.000000T0000Z-150717T2245Z/
MARSHALL SD-
522 PM CDT FRI JUL 17 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR
NORTHEASTERN MARSHALL COUNTY...
    
AT 521 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 8 MILES NORTHWEST OF LAKE CITY...OR 9 MILES EAST OF
BRITTON...MOVING EAST AT 15 MPH.

HAZARD...TORNADO AND HALF DOLLAR SIZE HAIL. 

SOURCE...RADAR INDICATED ROTATION. 

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT 
         SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE 
         TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR.  TREE DAMAGE IS 
         LIKELY. 

LOCATIONS IMPACTED INCLUDE...
RURAL AREAS OF NORTH CENTRAL MARSHALL COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4573 9738 4574 9769 4594 9776 4593 9743
TIME...MOT...LOC 2221Z 263DEG 14KT 4577 9757 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

SD

519 
WWUS53 KABR 172230
SVSABR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
530 PM CDT FRI JUL 17 2015

SDC091-172245-
/O.CON.KABR.TO.W.0007.000000T0000Z-150717T2245Z/
MARSHALL SD-
530 PM CDT FRI JUL 17 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR
NORTHEASTERN MARSHALL COUNTY...
    
AT 530 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR LAKE CITY...OR 10 MILES EAST OF BRITTON...MOVING
EAST AT 15 MPH.

HAZARD...TORNADO AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED ROTATION. 

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT 
         SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE 
         TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR.  TREE DAMAGE IS 
         LIKELY. 

THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
NORTHEASTERN MARSHALL COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4573 9738 4574 9760 4593 9759 4593 9743
TIME...MOT...LOC 2230Z 248DEG 13KT 4578 9753 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

SD

257 
WWUS53 KABR 172243
SVSABR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
543 PM CDT FRI JUL 17 2015

SDC091-172252-
/O.EXP.KABR.TO.W.0007.000000T0000Z-150717T2245Z/
MARSHALL SD-
543 PM CDT FRI JUL 17 2015

...THE TORNADO WARNING FOR NORTHEASTERN MARSHALL COUNTY WILL EXPIRE
AT 545 PM CDT...
    
THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
BEEN CANCELLED. HOWEVER...LARGE HAIL AND DAMAGING WINDS REMAIN LIKELY
AND A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THE AREA.
HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THIS THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FOR
NORTHEASTERN SOUTH DAKOTA.

REMEMBER...A SEVERE THUNDERSTORM WARNING STILL REMAINS IN EFFECT FOR
EAST CENTRAL MARSHALL COUNTY.

LAT...LON 4573 9738 4574 9760 4593 9759 4593 9743
TIME...MOT...LOC 2239Z 249DEG 14KT 4578 9753 

$$

SD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 8:24 PM CDT	Special Weather Statement	ABR	Brown	51 min
Jul 16, 8:25 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, McPherson	30 min
Jul 17, 4:34 PM CDT	Severe Thunderstorm Warning	ABR	Marshall	41 min
Jul 17, 4:38 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk	52 min
Jul 17, 4:52 PM CDT	Severe Thunderstorm Warning	ABR	McPherson	53 min
Jul 17, 5:07 PM CDT	Severe Thunderstorm Warning	ABR	Brown, McPherson	38 min
Jul 17, 5:21 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, Faulk, Spink	39 min
Jul 17, 5:31 PM CDT	Severe Thunderstorm Warning	ABR	Brown, McPherson	59 min
Jul 17, 5:41 PM CDT	Severe Thunderstorm Warning	ABR	Marshall, Roberts	64 min
Jul 17, 6:02 PM CDT	Severe Thunderstorm Warning	ABR	Brown	43 min
Jul 17, 6:18 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Day	57 min
Jul 17, 6:20 PM CDT	Tornado Warning	ABR	Marshall, Roberts	25 min
Jul 17, 6:24 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Day, Marshall	66 min
Jul 17, 6:44 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, Faulk, Spink	47 min
Jul 17, 6:44 PM CDT	Tornado Warning	ABR	Roberts	31 min
Jul 17, 6:46 PM CDT	Severe Thunderstorm Warning	ABR	Roberts	44 min
Jul 17, 6:57 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Spink	63 min

Nearby

Tornado Warnings in South Dakota, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.