Alert archive / South Dakota / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 177, NWS Aberdeen, SD

August 1, 2016Brown County, Day County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 1, 2016, 11:20 PM CDT for Brown County, Day County, South Dakota. It was in force for 55 min. 7 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: Aug 1, 2016, 11:20 PM CDT (04:20 UTC)
Expired: Aug 2, 2016, 12:15 AM CDT
In force: 55 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 2.0 in
Wind: 60.0 mph

Counties Brown County, SD, Day County, SD

The radar

The Aberdeen radar (KABR), 40 km from the middle of the area, began a volume at 04:24 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
Aug 1, 11:40 PM CDT	TSTM WND DMG	4 Wnw Bristol, SD	A 60 BY 80 FOOT SHED WAS DESTROYED. .
Aug 1, 11:40 PM CDT	TSTM WND DMG	Andover, SD	8 EMPTY RAIL CARS WERE DERAILED.
Aug 1, 11:40 PM CDT	TSTM WND DMG	Andover, SD	NUMEROUS TREES DOWNED ALONG WITH SOME POWER POLES IN ANDOVER. DAMAGE TO VEHICLES AND BUILDINGS FROM LARGE HAIL AND WINDS ALONG WITH CROP DAMAGE. HAIL PILED UP TO 1 FOOT OR MORE IN DITCHES. .
Aug 1, 11:40 PM CDT	TSTM WND GST 80	Andover, SD	TREES DOWN IN ANDOVER.
Aug 1, 11:40 PM CDT	HAIL 1.75	Andover, SD	.
Aug 1, 11:42 PM CDT	TSTM WND DMG	1 Ene Andover, SD	LOST THE ROOF OFF A BUILDING AND THE HOUSE. AN OUTBUILDING WAS ALSO DESTROYED. .
Aug 1, 11:42 PM CDT	TSTM WND GST 80	1 E Andover, SD	A TRAILER WAS FLIPPED. .

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 8 storm reports to this severe thunderstorm warning; the first came 20 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 4.3 hours before the alert went out and 67 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: 2143 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 1096 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 14.7

Open this sounding in Storm Lab

The text

As transmitted.

107 
WUUS53 KABR 020420
SVRABR
SDC013-037-020515-
/O.NEW.KABR.SV.W.0177.160802T0420Z-160802T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
1120 PM CDT MON AUG 1 2016

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL BROWN COUNTY IN NORTHEASTERN SOUTH DAKOTA...
  WESTERN DAY COUNTY IN NORTHEASTERN SOUTH DAKOTA...

* UNTIL 1215 AM CDT

* AT 1120 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR GROTON...
  MOVING SOUTHEAST AT 30 MPH.

  HAZARD...TWO INCH HAIL AND 60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL 
           DAMAGE TO ROOFS...SIDING...WINDOWS...AND VEHICLES. EXPECT 
           WIND DAMAGE TO ROOFS...SIDING...AND TREES. 

* THIS SEVERE THUNDERSTORM WILL BE NEAR...
  PIERPONT AND ANDOVER AROUND 1135 PM CDT. 
  BRISTOL AROUND 1150 PM CDT. 
  BUTLER AROUND 1205 AM CDT. 
  WEBSTER AROUND 1210 AM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4543 9818 4559 9803 4537 9744 4516 9769
TIME...MOT...LOC 0420Z 302DEG 25KT 4548 9801 

HAIL...2.00IN
WIND...60MPH
 
$$

WISE

3 follow-up statements

895 
WWUS53 KABR 020427
SVSABR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
1127 PM CDT MON AUG 1 2016

SDC013-037-020515-
/O.CON.KABR.SV.W.0177.000000T0000Z-160802T0515Z/
BROWN SD-DAY SD-
1127 PM CDT MON AUG 1 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR EAST CENTRAL BROWN AND WESTERN DAY COUNTIES...

AT 1127 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ANDOVER...OR
7 MILES EAST OF GROTON...MOVING SOUTHEAST AT 30 MPH.

THIS IS A VERY DANGEROUS STORM.

HAZARD...BASEBALL SIZE HAIL AND 60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE SEVERELY INJURED. 
         EXPECT SHATTERED WINDOWS...EXTENSIVE DAMAGE TO ROOFS...
         SIDING...AND VEHICLES. 

THIS SEVERE STORM WILL BE NEAR...
  PIERPONT AND ANDOVER AROUND 1135 PM CDT. 
  BRISTOL AROUND 1155 PM CDT. 
  BUTLER AROUND 1205 AM CDT. 
  WEBSTER AROUND 1210 AM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4543 9818 4559 9803 4537 9744 4516 9769
TIME...MOT...LOC 0427Z 302DEG 25KT 4545 9795 

HAIL...2.75IN
WIND...60MPH
 
$$

WISE

410 
WWUS53 KABR 020432
SVSABR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
1132 PM CDT MON AUG 1 2016

SDC013-037-020515-
/O.CON.KABR.SV.W.0177.000000T0000Z-160802T0515Z/
BROWN SD-DAY SD-
1132 PM CDT MON AUG 1 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR EAST CENTRAL BROWN AND WESTERN DAY COUNTIES...

AT 1132 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER ANDOVER...OR
9 MILES EAST OF GROTON...MOVING SOUTHEAST AT 30 MPH.

THIS IS A VERY DANGEROUS STORM.

HAZARD...80 MPH WIND GUSTS AND BASEBALL 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...
  PIERPONT AROUND 1135 PM CDT. 
  BRISTOL AROUND 1150 PM CDT. 
  BUTLER AROUND 1205 AM CDT. 
  WEBSTER AROUND 1210 AM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4543 9818 4559 9803 4537 9744 4516 9769
TIME...MOT...LOC 0432Z 302DEG 25KT 4543 9791 

HAIL...2.75IN
WIND...80MPH
 
$$

WISE

861 
WWUS53 KABR 020446
SVSABR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
1146 PM CDT MON AUG 1 2016

SDC013-037-020515-
/O.CON.KABR.SV.W.0177.000000T0000Z-160802T0515Z/
BROWN SD-DAY SD-
1146 PM CDT MON AUG 1 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR EAST CENTRAL BROWN AND WESTERN DAY COUNTIES...

AT 1145 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR BRISTOL...OR
13 MILES WEST OF WEBSTER...MOVING SOUTHEAST AT 30 MPH.

THIS IS A VERY DANGEROUS STORM.

HAZARD...80 MPH WIND GUSTS AND TWO INCH 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...
  BRISTOL AROUND 1150 PM CDT. 
  BUTLER AROUND 1205 AM CDT. 
  WEBSTER AROUND 1210 AM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4539 9811 4557 9796 4537 9744 4516 9769
TIME...MOT...LOC 0445Z 302DEG 25KT 4538 9779 

HAIL...2.00IN
WIND...80MPH
 
$$

WISE

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Aberdeen, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 1, 6:27 PM CDT, 4 hours 53 minutes earlier.

Area forecast discussion, Aug 1, 6:27 PM CDT, 4 hours 53 minutes before

Area Forecast Discussion...UPDATED
National Weather Service Aberdeen SD
627 PM CDT MON AUG 1 2016

.UPDATE...
Issued at 623 PM CDT MON AUG 1 2016

The Severe Thunderstorm Watch remains in effect this evening,
though so far the activity has been confined to North Dakota. The
expectation is that the potential for storms developing across
eastern SD will increase around or just after sunset. Made a few
adjustments to pops in the meantime. Also increased cloud cover
from Watertown south as an area of stratus is advecting north.

&&

.SHORT TERM...(This Evening through Wednesday Night)
Issued at 413 PM CDT MON AUG 1 2016

Latest sat pics and 88D data indicate storms forming over sc North
Dakota currently.  This is where the SPC meso page indicates the
best overlay of supportive convective parameters with decent deep
layer/ll shear as well as plenty of ml cape.  Expect this area of
storms to gradually grow into some sort of MCS, and then potentially
move southeast over ne South Dakota this evening. However,
confidence in the exact evolution of convection this evening is not
particularly high given varying CAM solutions. Nonetheless there
will be a threat for hail/wind and perhaps even a brief tornado if
any storm can get anchored on the outflow boundary/warm front headed
toward southern ND to the east of the north central SD sfc low.

The rest of the short range looks mostly dry until late Wednesday as
another front moves across the region.  The models continue to
indicate a fairly decent EML over top that front and thus convection
may be limited until Wednesday night when some cooling aloft spreads
across the forecast area as strong trof heads across southern
Canada.  Temperatures overall should be near to above normal through
Wednesday. Cooler temperatures are expected later in the week.

.LONG TERM...(Thursday through Monday)
Issued at 413 PM CDT MON AUG 1 2016

Cold front will be moving out of the area on Thursday and into MN.
Any lingering precip over the eastern CWA Thursday morning should be
out of the area by afternoon. Cooler and drier air will be moving in
on Thursday. After highs in the 90s for many areas on Wednesday,
Thursday will drop back down into the low to mid 80s for most areas.
Dewpoints will also drop down into the 50s which will feel
comfortable. Surface high pressure will move in Thursday night and
stick around through the day Friday. This will bring dry conditions,
light winds, and pleasant temperatures. The rest of the period sees
a small increase in precip chances as models suggest weak embedded
waves within mid level flow will cross the region. Did not stray too
far from SuperBlend pops at this time based on timing and
uncertainty.

&&

.AVIATION...(For the 00Z TAFS through 00Z Tuesday Evening)
Issued at 623 PM CDT MON AUG 1 2016

An area of MVFR stratus is pushing up into KATY this evening and
will likely linger then fall to IFR toward morning. Otherwise all
sites are VFR. Thunderstorm activity has been confined to ND so
far this evening, but there is starting to be some development
just west of KABR on some outflow boundaries and also with the
front near Corson county which may affect KMBG.

&&

.ABR Watches/Warnings/Advisories...
SD...NONE.
MN...NONE.
&&

UPDATE...Wise
SHORT TERM...TDK
LONG TERM...TMT
AVIATION...Wise

Hazardous weather outlook, Aug 1, 3:52 AM CDT, 19 hours 28 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ABERDEEN SD
352 AM CDT MON AUG 1 2016

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-021100-
TRAVERSE-BIG STONE-CORSON-CAMPBELL-MCPHERSON-BROWN-MARSHALL-
ROBERTS-WALWORTH-EDMUNDS-DAY-DEWEY-POTTER-FAULK-SPINK-CLARK-
CODINGTON-GRANT-HAMLIN-DEUEL-STANLEY-SULLY-HUGHES-HYDE-HAND-JONES-
LYMAN-BUFFALO-
352 AM CDT MON AUG 1 2016 /252 AM MDT MON AUG 1 2016/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL
MINNESOTA...CENTRAL SOUTH DAKOTA...NORTH CENTRAL SOUTH DAKOTA AND
NORTHEAST SOUTH DAKOTA.

.DAY ONE...TODAY AND TONIGHT

SCATTERED STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS
AFTERNOON ACROSS THE ENTIRE AREA...AND TONIGHT OVER EASTERN SOUTH
DAKOTA AND WEST CENTRAL MINNESOTA. STRONG WINDS AND HAIL WILL BE
THE MAIN THREATS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON INTO THIS EVENING.
ANY REPORTS OF HAIL OR STRONG WINDS IS ENCOURAGED. REPORTS CAN BE
SENT THROUGH OUR WEBPAGE...FACEBOOK...AND TWITTER OR BE CALLING
THE ABERDEEN NWS OFFICE.

KF

In the hours before

Special weather statement, Aug 1, 8:31 PM CDT, 2 hours 49 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
831 PM CDT MON AUG 1 2016

SDZ005-006-020200-
MCPHERSON SD-BROWN SD-
831 PM CDT MON AUG 1 2016

...SPECIAL WEATHER STATEMENT FOR NORTHEASTERN MCPHERSON AND
NORTHWESTERN BROWN COUNTIES UNTIL 900 PM CDT...

AT 831 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
OVER ELM LAKE...OR 10 MILES SOUTHWEST OF ELLENDALE...MOVING EAST AT
30 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
FREDERICK AND ELM LAKE.

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

LAT...LON 4580 9834 4583 9873 4594 9876 4594 9830
TIME...MOT...LOC 0131Z 273DEG 28KT 4588 9865

TDK

Local storm report, Aug 1, 8:54 PM CDT, 2 hours 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
854 PM CDT MON AUG 1 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0848 PM     HAIL             8 WNW FREDERICK         45.86N 98.66W
08/01/2016  E0.88 INCH       BROWN              SD   PUBLIC

            MOSTLY PEA TO NICKEL SIZE HAIL.

&&

RV

Local storm report, Aug 1, 9:41 PM CDT, 1 hour 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
941 PM CDT MON AUG 1 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0915 PM     HAIL             7 W FREDERICK           45.85N 98.65W
08/01/2016  E0.75 INCH       BROWN              SD   PUBLIC

            MOSTLY PEA TO PENNY SIZE HAIL.

&&

RV

Special weather statement, Aug 1, 9:54 PM CDT, 1 hour 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
954 PM CDT MON AUG 1 2016

SDZ007-008-020345-
MARSHALL SD-ROBERTS SD-
954 PM CDT MON AUG 1 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MARSHALL AND
NORTHWESTERN ROBERTS COUNTIES UNTIL 1045 PM CDT...

AT 954 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
VEBLEN FLATS HOUSING...OR 20 MILES NORTHWEST OF SISSETON...MOVING
SOUTHEAST AT 40 MPH.

NICKEL SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
SISSETON...VEBLEN...CLAIRE CITY...LONG HOLLOW HOUSING...
AGENCY VILLAGE...DAKOTA CONNECTION & CASINO...VEBLEN FLATS HOUSING...
HILLHEAD AND SICA HOLLOW STATE PARK.

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

LAT...LON 4575 9677 4552 9708 4593 9764 4594 9764
      4593 9718
TIME...MOT...LOC 0254Z 309DEG 34KT 4588 9733

WISE

Local storm report, Aug 1, 11:11 PM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
1111 PM CDT MON AUG 1 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1105 PM     HAIL             4 N GROTON              45.51N 98.10W
08/01/2016  E1.00 INCH       BROWN              SD   LAW ENFORCEMENT

            QUARTER SIZE HAIL AND TORRENTIAL RAIN.

&&

RV

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 9:02 PM CDT	Severe Thunderstorm Warning	ABR	Brown, McPherson	43 min
Aug 1, 9:43 PM CDT	Severe Thunderstorm Warning	ABR	Brown	47 min
Aug 1, 9:54 PM CDT	Special Weather Statement	ABR	Roberts	51 min
Aug 1, 9:59 PM CDT	Severe Thunderstorm Warning	ABR	Marshall, Roberts	13 min
Aug 1, 10:14 PM CDT	Severe Thunderstorm Warning	ABR	Brown	46 min
Aug 1, 10:33 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Day, Marshall	42 min
Aug 1, 10:57 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Day, Spink	48 min
Aug 1, 11:54 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Codington, Day, Grant, Roberts	34 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2016 Every severe thunderstorm warning in 2016

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.