Alert archive / South Dakota / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 217, NWS Aberdeen, SD

August 10, 2016Codington County, Grant County, Roberts County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 10, 2016, 6:03 PM CDT for Codington County, Grant County, Roberts County, South Dakota. It was in force for 42 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: Aug 10, 2016, 6:03 PM CDT (23:03 UTC)
Expired: Aug 10, 2016, 6:45 PM CDT
In force: 42 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Codington County, SD, Grant County, SD, Roberts County, SD

The radar

The Aberdeen radar (KABR), 128 km from the middle of the area, began a volume at 23:07 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 10, 6:04 PM CDT	TSTM WND GST 52	3 Ese Summit, SD	DIME SIZE HAIL ALSO OCCURRING.
Aug 10, 6:15 PM CDT	TSTM WND GST 61	1 N Twin Brooks, SD	.
Aug 10, 6:37 PM CDT	TSTM WND GST 60	Milbank, SD	.

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 2 storm reports to this severe thunderstorm warning; the first came 12 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 watch it was issued in

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

Issued	Product	Office	Lasted
Aug 10, 1:15 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.1 hours before the alert went out and 129 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: 1 J/kg
Mixed-layer CIN: -354 J/kg
Mixed-layer LCL: 752 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 365 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 12.7

Open this sounding in Storm Lab

The text

As transmitted.

697 
WUUS53 KABR 102303
SVRABR
SDC029-051-109-102345-
/O.NEW.KABR.SV.W.0217.160810T2303Z-160810T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
603 PM CDT WED AUG 10 2016

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN GRANT COUNTY IN NORTHEASTERN SOUTH DAKOTA...
  SOUTHEASTERN ROBERTS COUNTY IN NORTHEASTERN SOUTH DAKOTA...
  NORTHEASTERN CODINGTON COUNTY IN NORTHEASTERN SOUTH DAKOTA...

* UNTIL 645 PM CDT

* AT 603 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER MARVIN...OR
  13 MILES WEST OF MILBANK...MOVING EAST AT 25 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...
  TWIN BROOKS AROUND 620 PM CDT. 
  MILBANK AROUND 640 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4510 9702 4533 9701 4533 9652 4510 9651
TIME...MOT...LOC 2303Z 269DEG 21KT 4525 9691 

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

PARKIN

1 follow-up statement

734 
WWUS53 KABR 102345
SVSABR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
645 PM CDT WED AUG 10 2016

SDC029-051-109-102355-
/O.EXP.KABR.SV.W.0217.000000T0000Z-160810T2345Z/
GRANT SD-ROBERTS SD-CODINGTON SD-
645 PM CDT WED AUG 10 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GRANT...
SOUTHEASTERN ROBERTS AND NORTHEASTERN CODINGTON COUNTIES HAS
EXPIRED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE...THE WARNING HAS BEEN ALLOWED TO EXPIRE.  HOWEVER HEAVY
RAIN IS STILL POSSIBLE WITH THIS THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT FOR
NORTHEASTERN SOUTH DAKOTA.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
ABERDEEN.

LAT...LON 4510 9702 4533 9701 4533 9652 4510 9651
TIME...MOT...LOC 2344Z 269DEG 21KT 4525 9691 

$$

PARKIN

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 10, 3:28 PM CDT, 2 hours 35 minutes earlier.

Area forecast discussion, Aug 10, 3:28 PM CDT, 2 hours 35 minutes before

Area Forecast Discussion
National Weather Service Aberdeen SD
328 PM CDT WED AUG 10 2016

.SHORT TERM...(This Evening through Friday Night)
Issued at 328 PM CDT WED AUG 10 2016

The first round of convection quickly getting going on the WAA along
the ND/SD border has mainly stayed to the north, and been limited
across SD through 1945Z. Will continue to monitor as several
boundaries are now set up across the CWA. This primes us for later
this afternoon. Continue to have Severe Thunderstorm watch 439 in
effect until 8pm CDT this evening. Starting to see more cells
rapidly pop up east of ABR just before 20Z as the heat index values
rise above 100 across much of the area, with the dewpoint already up
to 75 at ABR. Small scale models have been of little help this
afternoon. The HiRes-ARW was one of the most promising solutions,
but had a bowing feature over northeastern SD at this time. Will
continue to monitor the current trends.

The second round of convection should be centered closer to the sfc
low southwest of PIR. Timing is still a concern with the evening
convection, but wind and hail look to be the main threats. Much of
the area also remains in the 5% tornado area, or probability of a
tornado within 25 miles of a point. Good shear and an intensifying
LLJ will be the story tonight. DCAPE values will be over 1000j/kg.
Am also concerned about the heavy rain potential with any stronger
storms as PW values are closer to 2-2.25in along northern SD and
eastern SD/west central MN through around 09Z. Consensus is to have
the thunderstorm activity restricted to the eastern third of the CWA
after 06Z Thursday, as the low slow moving sfc low slides to our
southeast counties by daybreak Thursday. Still have slow chance pops
going through the day over eastern SD and west central MN, but
severe potential will be off to our southeast during the day
Thursday.

Otherwise through Friday night, the trend will be slowly increasing
pressure with temperatures returning to near normal values Thursday
and Friday afternoon on northerly winds on the back side of the low.

.LONG TERM...(Saturday through Wednesday)
Issued at 328 PM CDT WED AUG 10 2016

An upper trough will finish exiting to the northeast on Saturday. A
broad ridge will build in for the start of next week. However, by
Monday night weak sfc low pressure and a few weak shortwaves will
traverse the Dakotas. At the moment, the energy does not seem
sufficient to overcome drier air near the sfc so pops remain low in
the forecast. Cannot completely rule out a shower or two Mon through
Wednesday. Temperatures will rise into the upper 80s to lower 90s
under the ridge.

&&

.AVIATION...(For the 18Z TAFS through 18Z Thursday Afternoon)
Issued at 1238 PM CDT WED AUG 10 2016

An area of low pressure will be affecting the region today and
tonight. There will be two rounds of storms. The first round
associated with a warm front will mainly affect KABR and possibly
KATY this afternoon. The second round will begin this evening as
the cold front sweeps through and will impact all sites from west
to east between 23z and 12z. VFR conditions are expected at all
sites with the exception of KATY which is struggling to clear out
some patchy stratus. VSBY and cigs may fall to MVFR/IFR in
stronger thunderstorms.

&&

.ABR Watches/Warnings/Advisories...
SD...Heat Advisory until 8 PM CDT /7 PM MDT/ this evening for SDZ006-010-
     016>018-033>037-045-048-051.

MN...NONE.
&&

SHORT TERM...KF
LONG TERM...Wise
AVIATION...Wise

Hazardous weather outlook, Aug 10, 4:10 AM CDT, 13 hours 53 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ABERDEEN SD
410 AM CDT WED AUG 10 2016

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-110915-
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-
410 AM CDT WED AUG 10 2016 /310 AM MDT WED AUG 10 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

EARLY THIS MORNING...SCATTERED STORMS WILL CONTINUE TO MOVE ACROSS
THE NORTHERN TIER OF SOUTH DAKOTA. THE RISK FOR SEVERE WEATHER IS
LOW.

LOW PRESSURE WILL DEVELOP TO OUR WEST TODAY...DRAWING A SECOND
SURGE OF HOT AIR INTO THE REGION. THIS WILL COMBINE WITH OUR HUMID
CONDITIONS RESULTING IN HEAT INDEX VALUES BETWEEN 95 AND 105
DEGREES THIS AFTERNOON.

THIS EVENING WE WILL ALSO SEE ADDITIONAL THUNDERSTORM ACTIVITY IN
THE VICINITY OF THE LOW PRESSURE AS IT MOVES INTO CENTRAL SOUTH
DAKOTA. STORMS WILL PROCEED TO THE EAST AHEAD OF A COLD FRONT.
STORMS COULD BE STRONG TO SEVERE WITH LARGE HAIL AND STRONG WINDS
THE MAIN THREAT. CANT RULE OUT A TORNADO OR TWO AS WELL.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUESTED THIS EVENING AND OVERNIGHT.

CONNELLY

In the hours before

Local storm report, Aug 10, 4:57 PM CDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
457 PM CDT WED AUG 10 2016

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

0450 PM     HAIL             5 WSW WAUBAY WILDLIFE R 45.40N 97.43W
08/10/2016  E1.00 INCH       DAY                SD   EMERGENCY MNGR

            .

&&

NWS ABERDEEN SD
IRIS SYSTEM

Local storm report, Aug 10, 5:01 PM CDT, 1 hour 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
501 PM CDT WED AUG 10 2016

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

0415 PM     TSTM WND GST     6 W LANGFORD            45.59N 97.96W
08/10/2016  M66 MPH          DAY                SD   MESONET

            .

&&

NWS ABERDEEN SD
IRIS SYSTEM

Local storm report, Aug 10, 5:04 PM CDT, 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
504 PM CDT WED AUG 10 2016

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

0503 PM     TSTM WND GST     2 W WAUBAY              45.34N 97.35W
08/10/2016  E60 MPH          DAY                SD   LAW ENFORCEMENT

            .

&&

KG

Special weather statement, Aug 10, 5:15 PM CDT, 48 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
515 PM CDT WED AUG 10 2016

SDZ004-005-009-010-102300-
CAMPBELL SD-EDMUNDS SD-MCPHERSON SD-WALWORTH SD-
515 PM CDT WED AUG 10 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN MCPHERSON...EASTERN
CAMPBELL...NORTHWESTERN EDMUNDS AND EASTERN WALWORTH COUNTIES UNTIL
600 PM CDT...

AT 515 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
SELBY...MOVING NORTHEAST AT 40 MPH.

NICKEL SIZE HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
EUREKA...SELBY...JAVA AND LAKE HIDDENWOOD REC AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

&&

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT FOR
NORTH CENTRAL SOUTH DAKOTA.

LAT...LON 4532 9989 4544 10017 4589 9987 4577 9956
TIME...MOT...LOC 2215Z 207DEG 36KT 4548 9997

WISE

Local storm report, Aug 10, 5:24 PM CDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
524 PM CDT WED AUG 10 2016

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

0500 PM     HAIL             WEBSTER                 45.34N 97.52W
08/10/2016  E1.00 INCH       DAY                SD   PUBLIC

            NICKEL TO QUARTER SIZED HAIL. RELAYED VIA
            SOCIAL MEDIA.

&&

SRF

Special weather statement, Aug 10, 5:44 PM CDT, 19 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
544 PM CDT WED AUG 10 2016

SDZ045-102330-
JONES SD-
544 PM CDT WED AUG 10 2016

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL JONES COUNTY UNTIL 630 PM
CDT...

AT 544 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
MURDO...MOVING NORTHEAST AT 15 MPH.

NICKEL SIZE HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
MURDO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

&&

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT FOR
CENTRAL SOUTH DAKOTA.

LAT...LON 4386 10074 4393 10093 4413 10086 4404 10059
TIME...MOT...LOC 2244Z 204DEG 12KT 4397 10080

WISE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 9:35 PM CDT	Special Weather Statement	ABR	Campbell	25 min
Aug 9, 10:09 PM CDT	Severe Thunderstorm Warning	ABR	Corson	51 min
Aug 9, 10:16 PM CDT	Severe Thunderstorm Warning	ABR	Campbell	44 min
Aug 9, 10:45 PM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	60 min
Aug 9, 10:53 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, McPherson	52 min
Aug 9, 11:09 PM CDT	Tornado Warning	ABR	Campbell, McPherson	51 min
Aug 9, 11:43 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, Dewey, Walworth	47 min
Aug 9, 11:45 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, McPherson	45 min
Aug 9, 11:54 PM CDT	Tornado Warning	ABR	Campbell, McPherson	41 min
Aug 10, 12:00 AM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	45 min
Aug 10, 12:17 AM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, Dewey, Edmunds, Faulk, McPherson and 2 more	43 min
Aug 10, 12:33 AM CDT	Severe Thunderstorm Warning	ABR	McPherson	42 min
Aug 10, 12:53 AM CDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, McPherson, Walworth	67 min
Aug 10, 1:19 AM CDT	Severe Thunderstorm Warning	ABR	Campbell, Dewey, Walworth	41 min
Aug 10, 1:34 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, McPherson	56 min
Aug 10, 1:53 AM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Walworth	40 min
Aug 10, 2:05 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds	40 min
Aug 10, 2:18 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Day, Grant, Marshall, Roberts, Spink	57 min
Aug 10, 2:27 AM CDT	Areal Flood Warning	ABR	Campbell, McPherson	6 hr
Aug 10, 2:40 AM CDT	Tornado Warning	ABR	Marshall, Roberts	35 min
Aug 10, 3:00 AM CDT	Special Weather Statement	ABR	McPherson	30 min
Aug 10, 3:06 AM CDT	Severe Thunderstorm Warning	ABR	Roberts	54 min
Aug 10, 3:33 AM CDT	Special Weather Statement	ABR	McPherson	42 min
Aug 10, 4:02 AM CDT	Special Weather Statement	ABR	Brown	28 min
Aug 10, 3:50 PM CDT	Severe Thunderstorm Warning	ABR	Day	40 min
Aug 10, 4:03 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Day	42 min
Aug 10, 4:27 PM CDT	Severe Thunderstorm Warning	ABR	Day, Marshall	48 min
Aug 10, 4:33 PM CDT	Severe Thunderstorm Warning	ABR	Day, Marshall	42 min
Aug 10, 4:44 PM CDT	Severe Thunderstorm Warning	ABR	Day, Roberts	46 min
Aug 10, 5:07 PM CDT	Severe Thunderstorm Warning	ABR	Day, Grant, Roberts	38 min
Aug 10, 5:15 PM CDT	Special Weather Statement	ABR	Walworth	45 min
Aug 10, 5:20 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, McPherson, Walworth	11 min
Aug 10, 5:37 PM CDT	Flash Flood Warning	ABR	Day	6 hr
Aug 10, 5:44 PM CDT	Special Weather Statement	ABR	Jones	46 min
Aug 10, 5:44 PM CDT	Severe Thunderstorm Warning	ABR	Day, Grant, Roberts	32 min
Aug 10, 5:47 PM CDT	Severe Thunderstorm Warning	ABR	Jones	22 min
Aug 10, 6:00 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Walworth	45 min
Aug 10, 6:30 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, McPherson, Walworth	45 min
Aug 10, 6:34 PM CDT	Severe Thunderstorm Warning	ABR	Jones, Stanley	17 min
Aug 10, 6:39 PM CDT	Severe Thunderstorm Warning	ABR	Grant, Roberts	37 min
Aug 10, 6:49 PM CDT	Special Weather Statement	ABR	Campbell	41 min
Aug 10, 6:49 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Sully	41 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.