Alert archive / Wyoming / Tornado Warnings in 2007

Tornado Warning 2, NWS Riverton, WY

June 16, 2007Johnson County, Wyoming

NWS Riverton, WY issued this tornado warning at Jun 16, 2007, 5:16 PM MDT for Johnson County, Wyoming. It was in force for 29 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
Jun 16, 2007, 5:16 PM MDT (23:16 UTC)
Expired
Jun 16, 2007, 5:45 PM MDT
In force
29 min
Issued by
NWS Riverton, WY
Area
Counties, with a storm outline in the text

County Johnson County, WY

The radar

The Riverton/Lander radar (KRIW), 228 km from the middle of the area, began a volume at 23:18 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 watch it was issued in

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

IssuedProductOfficeLasted
Jun 16, 4:10 PM MDTTornado WatchSPC9 hr

The nearest sounding before it

Riverton, WY (KRIW), launched 12:00Z, 11.3 hours before the alert went out and 223 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-pSkew-T log-p diagram, Riverton, WY at 12:00Z on 2007-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 460 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 12:00Z on 2007-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
460 J/kg
Mixed-layer CIN
-302 J/kg
Mixed-layer LCL
1749 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
165 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
WFUS55 KRIW 162316
TORRIW
WYC019-162345-
/O.NEW.KRIW.TO.W.0002.070616T2316Z-070616T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE RIVERTON WY
516 PM MDT SAT JUN 16 2007

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL JOHNSON COUNTY IN NORTH CENTRAL WYOMING...

* UNTIL 545 PM MDT

* AT 514 PM MDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE
  A SEVERE THUNDERSTORM WITH STRONG ROTATION 6 MILES NORTH OF I90
  EXIT 82...OR ABOUT 21 MILES EAST OF BUFFALO...MOVING EAST AT 35
  MPH.

* THE TORNADO WILL BE NEAR...
  I90 EXIT 91 BY 525 PM MDT...
  I90 MILE MARKER 95 BY 530 PM MDT...

IF YOU ARE NEAR THE PATH OF THIS TORNADO...TAKE COVER IN AN INTERIOR
ROOM ON THE LOWEST FLOOR. PROTECT YOUR HEAD AND BODY FROM FLYING
DEBRIS.

THIS IS A DANGEROUS STORM ACT QUICKLY. IF YOU ARE IN THE PATH OF
THIS TORNADO MOVE TO THE LOWEST FLOOR OF A STURDY BUILDING.

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

LAT...LON 4437 10634 4419 10633 4416 10603 4440 10603

$$

JONES
2 follow-up statements
000 
WWUS55 KRIW 162332
SVSRIW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
532 PM MDT SAT JUN 16 2007

WYC019-162345-
/O.CON.KRIW.TO.W.0002.000000T0000Z-070616T2345Z/
JOHNSON WY-
532 PM MDT SAT JUN 16 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM MDT FOR EAST
CENTRAL JOHNSON COUNTY...

AT 527 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR I90 EXIT 91...OR
ABOUT 30 MILES EAST OF BUFFALO...MOVING EAST AT 35 MPH.

IF YOU ARE NEAR THE PATH OF THIS TORNADO...TAKE COVER IN AN INTERIOR
ROOM ON THE LOWEST FLOOR. PROTECT YOUR HEAD AND BODY FROM FLYING
DEBRIS.

THIS IS A DANGEROUS STORM ACT QUICKLY. IF YOU ARE IN THE PATH OF
THIS TORNADO MOVE TO THE LOWEST FLOOR OF A STURDY BUILDING.

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

LAT...LON 4437 10634 4419 10633 4416 10603 4440 10603

$$

JONES
000 
WWUS55 KRIW 162344
SVSRIW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
544 PM MDT SAT JUN 16 2007

WYC019-162353-
/O.EXP.KRIW.TO.W.0002.000000T0000Z-070616T2345Z/
JOHNSON WY-
543 PM MDT SAT JUN 16 2007

...THE TORNADO WARNING FOR EAST CENTRAL JOHNSON COUNTY EXPIRES AT 545
PM MDT...

THE STORM HAS EXITED THE WARNED AREA. THEREFORE...THE WARNING WILL BE
ALLOWED TO EXPIRE.

ANOTHER TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN JOHNSON 
COUNTY UNTIL 615 PM MDT. THIS SOUTHERN STORM REMAINS DANGEROUS AND 
PEOPLE IN THE WARNED AREA AROUND AND SOUTH OF KAYCEE SHOULD SEEK 
IMMEDIATE SHELTER.

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

LAT...LON 4437 10634 4419 10633 4416 10603 4440 10603

$$

JONES

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 16, 5:23 PM MDTSevere Thunderstorm WarningRIWJohnson67 min
Jun 16, 5:30 PM MDTTornado WarningRIWJohnson45 min

Nearby

Tornado Warnings in Wyoming, 2007Every tornado warning in 2007Tornadoes in 2007

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.