Alert archive / Wyoming / Tornado Warnings in 2016

Tornado Warning 4, NWS Riverton, WY

August 26, 2016Hot Springs County, Wyoming

NWS Riverton, WY issued this tornado warning at Aug 26, 2016, 3:05 PM MDT for Hot Springs County, Wyoming. It was in force for 12 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 26, 2016, 3:05 PM MDT (21:05 UTC)
Expired: Aug 26, 2016, 3:17 PM MDT
In force: 12 min
Issued by: NWS Riverton, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.5 in

County Hot Springs County, WY

The radar

The Riverton/Lander radar (KRIW), 65 km from the middle of the area, began a volume at 21:09 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.

The nearest sounding before it

Riverton, WY (KRIW), launched 12:00Z, 9.1 hours before the alert went out and 63 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: 28 J/kg
Mixed-layer CIN: -158 J/kg
Mixed-layer LCL: 1019 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

994 
WFUS55 KRIW 262105
TORRIW
WYC017-262145-
/O.NEW.KRIW.TO.W.0004.160826T2105Z-160826T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE RIVERTON WY
305 PM MDT FRI AUG 26 2016

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN HOT SPRINGS COUNTY IN CENTRAL WYOMING...

* UNTIL 345 PM MDT
    
* AT 305 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED OVER EAST THERMOPOLIS...OR OVER
  THERMOPOLIS...MOVING EAST AT 25 MPH.

  HAZARD...TORNADO...PING PONG BALL SIZE HAIL...AND 60 MPH WIND
           GUSTS. 

  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
  SOUTHEASTERN HOT SPRINGS COUNTY...INCLUDING THE FOLLOWING
  LOCATIONS: HOT SPRGS COUNTY THERMOPOLIS AIRPORT...THERMOPOLIS HIGH
  SCHOOL... HOTSPRINGS MIDDLE SCHOOL...LEGION TOWN AND COUNTRY GOLF
  COURSE... RALPH WITTERS ELEMENTARY SCHOOL...THERMOPOLIS MIDDLE
  SCHOOL...HOT SPRINGS COUNTY FAIRGROUNDS...HOT SPRINGS COUNTY
  LIBRARY...THERMOPOLIS HOT SPRINGS COUNTY MEMORIAL HOSPITAL AND
  CENTRAL WYOMING COLLEGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

&&

LAT...LON 4355 10831 4372 10828 4372 10794 4348 10791
TIME...MOT...LOC 2105Z 276DEG 21KT 4363 10820 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

LIPSON

1 follow-up statement

925 
WWUS55 KRIW 262117
SVSRIW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
317 PM MDT FRI AUG 26 2016

WYC017-262125-
/O.CAN.KRIW.TO.W.0004.000000T0000Z-160826T2145Z/
HOT SPRINGS-
317 PM MDT FRI AUG 26 2016

...THE TORNADO WARNING FOR SOUTHEASTERN HOT SPRINGS COUNTY IS
CANCELLED...
        
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND HAVE EXITED THE WARNED AREA. THEREFORE...THE WARNING HAS
BEEN CANCELLED.  HOWEVER SMALL HAIL...GUSTY WINDS AND HEAVY RAIN ARE
STILL POSSIBLE WITH THIS THUNDERSTORM.

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

LAT...LON 4355 10831 4372 10828 4372 10794 4348 10791
TIME...MOT...LOC 2112Z 276DEG 21KT 4362 10811 

$$

LIPSON

The office that day

Everything else NWS Riverton, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 25, 6:06 PM MDT	Special Weather Statement	RIW	Fremont	24 min
Aug 25, 6:15 PM MDT	Special Weather Statement	RIW		30 min
Aug 25, 7:00 PM MDT	Special Weather Statement	RIW		45 min
Aug 25, 7:36 PM MDT	Special Weather Statement	RIW		39 min
Aug 25, 8:15 PM MDT	Special Weather Statement	RIW		30 min
Aug 25, 8:36 PM MDT	Special Weather Statement	RIW	Natrona	24 min
Aug 25, 9:00 PM MDT	Special Weather Statement	RIW	Natrona	45 min
Aug 26, 1:29 PM MDT	Fire Weather Watch	RIW	Fremont, Hot Springs, Johnson, Lincoln, Natrona, Park and 5 more	12 hr
Aug 26, 1:48 PM MDT	Special Weather Statement	RIW	Hot Springs	27 min
Aug 26, 2:23 PM MDT	Special Weather Statement	RIW	Hot Springs	22 min
Aug 26, 2:44 PM MDT	Severe Thunderstorm Warning	RIW	Hot Springs	46 min
Aug 26, 3:03 PM MDT	Tornado Warning	RIW	Hot Springs	17 min
Aug 26, 3:28 PM MDT	Special Weather Statement	RIW	Washakie	32 min
Aug 26, 3:51 PM MDT	Special Weather Statement	RIW	Washakie	24 min
Aug 26, 4:13 PM MDT	Special Weather Statement	RIW		32 min
Aug 26, 4:39 PM MDT	Special Weather Statement	RIW	Sweetwater	36 min
Aug 26, 4:46 PM MDT	Special Weather Statement	RIW	Natrona	29 min
Aug 26, 4:51 PM MDT	Special Weather Statement	RIW	Johnson	39 min
Aug 26, 5:07 PM MDT	Special Weather Statement	RIW	Natrona	23 min
Aug 26, 5:13 PM MDT	Special Weather Statement	RIW	Natrona	32 min
Aug 26, 5:16 PM MDT	Special Weather Statement	RIW		29 min
Aug 26, 5:30 PM MDT	Special Weather Statement	RIW	Natrona	60 min
Aug 26, 5:46 PM MDT	Special Weather Statement	RIW	Natrona	14 min

Nearby

Tornado Warnings in Wyoming, 2016 Every tornado warning in 2016 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.