Alert archive / South Dakota / Tornado Warnings in 2018

Tornado Warning 8, NWS Aberdeen, SD

July 3, 2018Dewey County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jul 3, 2018, 11:58 PM MDT for Dewey County, South Dakota. It was in force for 21 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 3, 2018, 11:58 PM MDT (05:58 UTC)
Expired: Jul 4, 2018, 12:19 AM MDT
In force: 21 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Dewey County, SD

The radar

The Rapid City radar (KUDX), 165 km from the middle of the area, began a volume at 05:58 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 4, 12:04 AM MDT	TSTM WND DMG	Eagle Butte, SD	ONE EMPTY CAMPER TRAILER DESTROYED AND ONE TIPPED OVER. TREE UPROOTED. REPORT VIA SOCIAL MEDIA.
Jul 4, 12:09 AM MDT	TSTM WND GST 70	4 Nne Eagle Butte, SD

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

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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
Jul 3, 10:02 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Rapid City, SD (KRAP), launched 00:00Z, 6.0 hours before the alert went out and 172 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: 931 J/kg
Mixed-layer CIN: -300 J/kg
Mixed-layer LCL: 1369 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 226 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

119 
WFUS53 KABR 040558
TORABR
SDC041-040630-
/O.NEW.KABR.TO.W.0008.180704T0558Z-180704T0630Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Aberdeen SD
1158 PM MDT TUE JUL 3 2018

The National Weather Service in Aberdeen has issued a

* Tornado Warning for...
  West central Dewey County in north central South Dakota...

* Until 1230 AM MDT.
    
* At 1158 PM MDT, a severe thunderstorm capable of producing a
  tornado was located near Lantry, moving northeast at 40 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 dangerous storm will be near...
  Eagle Butte around 1215 AM MDT.
  Parade around 1225 AM MDT.

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 4517 10113 4503 10093 4498 10114 4499 10114
      4500 10150 4502 10150
TIME...MOT...LOC 0558Z 241DEG 34KT 4496 10144 

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

$$

Connelly

1 follow-up statement

984 
WWUS53 KABR 040619
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
1219 AM MDT WED JUL 4 2018

SDC041-040628-
/O.CAN.KABR.TO.W.0008.000000T0000Z-180704T0630Z/
Dewey SD-
1219 AM MDT WED JUL 4 2018

...THE TORNADO WARNING FOR WEST CENTRAL DEWEY COUNTY IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 400 AM MDT for
north central South Dakota.

LAT...LON 4517 10113 4503 10093 4498 10114 4499 10114
      4500 10150 4502 10150
TIME...MOT...LOC 0616Z 241DEG 34KT 4505 10121 

$$

Connelly

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Jul 3, 11:29 PM MDT, 29 minutes earlier.

Area forecast discussion, Jul 3, 11:29 PM MDT, 29 minutes before

Area Forecast Discussion...UPDATED
National Weather Service Aberdeen SD
1229 AM CDT Wed Jul 4 2018

.UPDATE...
Issued at 801 PM CDT Tue Jul 3 2018

Allowed heat advisory to expire. Developing thunderstorms are
adding to the cloud cover and temperatures are dropping in areas
receiving rain. Drier spots across south central SD will slowly
cool after sunset.

UPDATE Issued at 630 PM CDT Tue Jul 3 2018

Made a few tweaks to evening pops based on latest HRRR and current
radar returns. Otherwise, forecast remains on track for the
overnight period with two rounds of storms possible.

&&

.SHORT TERM...(This Evening through Wednesday)
Issued at 223 PM CDT Tue Jul 3 2018

Convection remains the main challenge in the short range.
Instability continues to increase across the region this afternoon as
diabatic heating continues. However, deep layer shear is probably
slackening as the mid level westerlies retreat to the north this
afternoon and evening. Also, heights continue to build
across the region with warming temps aloft. Meanwhile, ll shear will
remain decent through tonight given continued llj, and its diurnal
increase this evening. The CAMS and non-CAMS are at odds concerning
convective development in the northeast toward evening. The HRRR is
somewhat aggressive, perhaps picking up on outflow boundaries left
behind by the morning convection.  Non-CAMS favor activity
developing further north, or not at all over the northeast this
evening. Later in the evening there is fair agreement that an MCS
will fire up over the High Plains, and then head northeast
overnight. The main threat with the possible early evening
convection will be hail and heavy rain, and the late night activity
should favor gusty winds. Nonetheless, confidence in how all this
will play out is fairly low attm.  Temperatures will be above normal
through Wednesday.

.LONG TERM...(Wednesday Night through Tuesday)
Issued at 223 PM CDT Tue Jul 3 2018

Mid level ridge will expand from the eastern conus, back west to the
central conus during the period. The ridge does get knocked down
some by passing s/w energy late in the weekend, into early next
week. That is likely the best opportunity for any meaningful pcpn
during the period, since prior to that the strong mid level ridge
should provide for general subsidence across the Northern Plains.
Meanwhile, temperatures should remain near to above normal through
most of the period.

&&

.AVIATION...(For the 06Z TAFS through 06Z Wednesday Night)
Issued at 1225 AM CDT Wed Jul 4 2018

Showers and thunderstorms crossing the region early this morning
will bring mixed flying conditions. Southerly winds ahead the
storms will become northwesterly this afternoon.

&&

.ABR WATCHES/WARNINGS/ADVISORIES...
SD...None.
MN...None.
&&

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

Hazardous weather outlook, Jul 3, 12:23 PM MDT, 11 hours 35 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Aberdeen SD
123 PM CDT Tue Jul 3 2018

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-041830-
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-
123 PM CDT Tue Jul 3 2018 /1223 PM MDT Tue Jul 3 2018/

This Hazardous Weather Outlook is for portions of west central
Minnesota, central South Dakota, north central South Dakota, and
northeast South Dakota.

.DAY ONE...This Afternoon and Tonight

More storms are expected this evening and overnight. Severe storms
are possible with strong winds and large hail being the main
threats. Storms could fire first in the northeast, and then later
in the evening out west.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Showers and storms will linger into Wednesday across the east.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

tdk

In the hours before

Special weather statement, Jul 3, 8:37 PM MDT, 3 hours 21 minutes before

Special Weather Statement
National Weather Service Aberdeen SD
937 PM CDT TUE JUL 3 2018

SDZ017-037-040330-
Hand SD-Faulk SD-
937 PM CDT TUE JUL 3 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN HAND AND SOUTH
CENTRAL FAULK COUNTIES UNTIL 1030 PM CDT...

At 936 PM CDT, Doppler radar was tracking a strong thunderstorm near
Polo, or 14 miles north of Miller, moving northwest at 20 mph.

Nickel size hail will be possible with this storm.

Locations impacted include...
Orient and Polo.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
central and north central South Dakota.

LAT...LON 4502 9904 4471 9887 4463 9910 4488 9932
      4489 9931 4490 9933 4492 9935
TIME...MOT...LOC 0236Z 155DEG 18KT 4473 9904

Wise

Local storm report, Jul 3, 8:55 PM MDT, 3 hours 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
955 PM CDT TUE JUL 3 2018

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

0945 PM     HAIL             2 ENE POLO              44.79N 99.07W
07/03/2018  E1.00 INCH       HAND               SD   PUBLIC

            QUARTER SIZE HAIL REPORTED.

&&

DYE

Special weather statement, Jul 3, 9:31 PM MDT, 2 hours 27 minutes before

Special Weather Statement
National Weather Service Aberdeen SD
1031 PM CDT TUE JUL 3 2018

MNZ039-046-040415-
Traverse MN-Big Stone MN-
1031 PM CDT TUE JUL 3 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN TRAVERSE AND
NORTHEASTERN BIG STONE COUNTIES UNTIL 1115 PM CDT...

At 1031 PM CDT, Doppler radar was tracking a strong thunderstorm over
Clinton, or 11 miles north of Ortonville, moving northeast at 20 mph.

Nickel size hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Graceville, Clinton, Johnson and Trinity Lutheran Country Church.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4540 9645 4550 9660 4569 9626 4566 9625
      4559 9625 4558 9624 4543 9624
TIME...MOT...LOC 0331Z 235DEG 16KT 4547 9645

SD

Special weather statement, Jul 3, 9:46 PM MDT, 2 hours 12 minutes before

Special Weather Statement
National Weather Service Aberdeen SD
946 PM MDT TUE JUL 3 2018

SDZ003-040430-
Corson SD-
946 PM MDT TUE JUL 3 2018

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN CORSON COUNTY UNTIL 1030
PM MDT...

At 945 PM MDT, Doppler radar was tracking a strong thunderstorm near
Shambo Ranch, or 27 miles south of Lemmon, moving east at 35 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Morristown, Watauga, Shambo Ranch, Keldron and Thunder Hawk.

LAT...LON 4594 10200 4594 10149 4547 10144 4547 10200
TIME...MOT...LOC 0345Z 257DEG 32KT 4556 10197

SD

Special weather statement, Jul 3, 10:05 PM MDT, 1 hour 53 minutes before

Special Weather Statement
National Weather Service Aberdeen SD
1005 PM MDT TUE JUL 3 2018

SDZ003-040445-
Corson SD-
1005 PM MDT TUE JUL 3 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CORSON COUNTY UNTIL
1045 PM MDT...

At 1005 PM MDT, Doppler radar was tracking a strong thunderstorm over
northern Lake Oahe, or 9 miles northwest of Mobridge, moving north at
25 mph.

Nickel size hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Mclaughlin, Wakpala, Mahto and Indian Memorial Rec Area.

A Severe Thunderstorm Watch remains in effect until 400 AM MDT for
north central South Dakota.

LAT...LON 4558 10047 4555 10063 4581 10086 4588 10053
TIME...MOT...LOC 0405Z 163DEG 21KT 4563 10059

Wise

Special weather statement, Jul 3, 11:02 PM MDT, 56 minutes before

Special Weather Statement
National Weather Service Aberdeen SD
1202 AM CDT WED JUL 4 2018

SDZ004-005-009-010-040545-
Walworth SD-Campbell SD-McPherson SD-Edmunds SD-
1202 AM CDT WED JUL 4 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN EDMUNDS...EASTERN
CAMPBELL...WESTERN MCPHERSON AND EASTERN WALWORTH COUNTIES UNTIL 1245
AM CDT...

At 1201 AM CDT, Doppler radar was tracking a strong thunderstorm near
Hosmer, or 14 miles south of Eureka, moving north at 55 mph.

Nickel size hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Eureka, Selby, Bowdle, Herreid, Roscoe, Hosmer, Java, Mound City,
Artas, Hillsview, Lake Hiddenwood Rec Area and Greenway.

A Severe Thunderstorm Watch remains in effect until 500 AM CDT for
north central South Dakota.

LAT...LON 4543 9933 4528 9995 4590 10015 4592 9940
TIME...MOT...LOC 0501Z 168DEG 46KT 4556 9958

Wise

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 6:09 PM MDT	Special Weather Statement	ABR	Faulk	66 min
Jul 3, 6:14 PM MDT	Severe Thunderstorm Warning	ABR	Faulk, Hand	61 min
Jul 3, 7:14 PM MDT	Severe Thunderstorm Warning	ABR	Faulk, Hand	42 min
Jul 3, 7:21 PM MDT	Flash Flood Warning	ABR	Faulk, Hand	6 hr
Jul 3, 7:59 PM MDT	Special Weather Statement	ABR	Grant	46 min
Jul 3, 8:21 PM MDT	Special Weather Statement	ABR	Walworth	39 min
Jul 3, 8:37 PM MDT	Special Weather Statement	ABR	Faulk	53 min
Jul 3, 8:41 PM MDT	Severe Thunderstorm Warning	ABR	Faulk, Hand	43 min
Jul 3, 9:20 PM MDT	Severe Thunderstorm Warning	ABR	Faulk, Hand	40 min
Jul 3, 9:46 PM MDT	Special Weather Statement	ABR	Corson	44 min
Jul 3, 9:55 PM MDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk	50 min
Jul 3, 9:59 PM MDT	Severe Thunderstorm Warning	ABR	Corson	34 min
Jul 3, 10:05 PM MDT	Special Weather Statement	ABR	Corson	40 min
Jul 3, 10:45 PM MDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk	31 min
Jul 3, 10:51 PM MDT	Severe Thunderstorm Warning	ABR	Corson	39 min
Jul 3, 11:02 PM MDT	Special Weather Statement	ABR	Campbell	43 min
Jul 3, 11:25 PM MDT	Severe Thunderstorm Warning	ABR	Corson	50 min
Jul 3, 11:48 PM MDT	Severe Thunderstorm Warning	ABR	Dewey, Stanley	42 min
Jul 3, 11:50 PM MDT	Severe Thunderstorm Warning	ABR	Campbell	21 min
Jul 3, 11:55 PM MDT	Severe Thunderstorm Warning	ABR	Campbell, McPherson	50 min
Jul 4, 12:07 AM MDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, Dewey, Walworth	38 min
Jul 4, 12:13 AM MDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Stanley, Sully	47 min
Jul 4, 12:31 AM MDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	29 min
Jul 4, 12:42 AM MDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, Dewey, Potter, Sully, Walworth	48 min
Jul 4, 12:51 AM MDT	Flash Flood Warning	ABR	Campbell, Corson	6 hr
Jul 4, 12:58 AM MDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, Dewey, Walworth	47 min
Jul 4, 1:08 AM MDT	Areal Flood Warning	ABR	Faulk, Hand	11 hr
Jul 4, 1:10 AM MDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, Faulk, Hyde, McPherson, Potter and 2 more	50 min
Jul 4, 1:43 AM MDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk, McPherson	47 min
Jul 4, 2:15 AM MDT	Severe Thunderstorm Warning	ABR	Brown, McPherson	30 min
Jul 4, 2:41 AM MDT	Special Weather Statement	ABR	Brown, Spink	34 min
Jul 4, 3:50 AM MDT	Special Weather Statement	ABR	Clark, Codington, Day, Grant, Hamlin, Roberts	40 min
Jul 4, 6:15 AM MDT	Areal Flood Warning	ABR	Corson	6 hr
Jul 4, 12:15 PM MDT	Areal Flood Warning	ABR	Corson	13 hr

Nearby

Tornado Warnings in South Dakota, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.