Alert archive / Wyoming / Tornado Warnings in 2014

Tornado Warning 2, NWS Riverton, WY

May 24, 2014Big Horn County, Wyoming

NWS Riverton, WY issued this tornado warning at May 24, 2014, 2:44 PM MDT for Big Horn County, Wyoming. It was in force for 16 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: May 24, 2014, 2:44 PM MDT (20:44 UTC)
Expired: May 24, 2014, 3:00 PM MDT
In force: 16 min
Issued by: NWS Riverton, WY
Area: Storm-based polygon
Tornado: Observed
Hail: 0.75 in

County Big Horn County, WY

The radar

The Billings radar (KBLX), 106 km from the middle of the area, began a volume at 20:44 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, 8.7 hours before the alert went out and 206 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1456 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 7 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

977 
WFUS55 KRIW 242044
TORRIW
WYC003-242100-
/O.NEW.KRIW.TO.W.0002.140524T2044Z-140524T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE RIVERTON WY
244 PM MDT SAT MAY 24 2014

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN BIG HORN COUNTY IN CENTRAL WYOMING...

* UNTIL 300 PM MDT

* AT 240 PM MDT...A CONFIRMED TORNADO WAS LOCATED NEAR COWLEY...AND
  MOVING SOUTH AT 15 MPH.

  HAZARD...TORNADO.

  SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO.

  IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES.

* THE TORNADO WILL AFFECT MAINLY RURAL AREAS OF NORTHWESTERN BIG HORN
  COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
RIVERTON AT 1-800-211-1448.

LAT...LON 4486 10821 4486 10851 4500 10853 4501 10829
TIME...MOT...LOC 2044Z 341DEG 15KT 4489 10837

TORNADO...OBSERVED
HAIL...<.75IN

$$

ALLEN

1 follow-up statement

689 
WWUS55 KRIW 242102
SVSRIW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
302 PM MDT SAT MAY 24 2014

WYC003-242111-
/O.EXP.KRIW.TO.W.0002.000000T0000Z-140524T2100Z/
BIG HORN WY-
302 PM MDT SAT MAY 24 2014

...THE TORNADO WARNING FOR NORTHWESTERN BIG HORN COUNTY IN CENTRAL
WYOMING HAS EXPIRED...

THE TORNADO WARNING HAS EXPIRED. HOWEVER...A SEVERE THUNDERSTORM 
WARNING REMAINS IN EFFECT FOR THE AREA. 

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

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
RIVERTON AT 1-800-211-1448.

LAT...LON 4486 10821 4486 10851 4500 10853 4501 10829
TIME...MOT...LOC 2044Z 341DEG 15KT 4489 10837

$$

ALLEN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 6:20 PM MDT	Special Weather Statement	RIW	Fremont	40 min
May 23, 6:30 PM MDT	Special Weather Statement	RIW	Hot Springs	45 min
May 23, 7:01 PM MDT	Special Weather Statement	RIW	Fremont	59 min
May 24, 2:20 PM MDT	Special Weather Statement	RIW	Sublette	25 min
May 24, 2:25 PM MDT	Special Weather Statement	RIW		35 min
May 24, 2:58 PM MDT	Severe Thunderstorm Warning	RIW	Big Horn	32 min
May 24, 3:27 PM MDT	Areal Flood Advisory	RIW	Sweetwater	3 hr
May 24, 3:33 PM MDT	Special Weather Statement	RIW	Big Horn	42 min
May 24, 3:39 PM MDT	Special Weather Statement	RIW	Sweetwater	51 min
May 24, 3:48 PM MDT	Special Weather Statement	RIW	Big Horn	42 min

Nearby

Tornado Warnings in Wyoming, 2014 Every tornado warning in 2014 Tornadoes in 2014

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.