Alert archive / Wyoming / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 13, NWS Cheyenne, WY

May 3, 2007Albany County, Converse County, Platte County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at May 3, 2007, 4:48 PM MDT for Albany County, Converse County, Platte County, Wyoming. It was in force for 27 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 3, 2007, 4:48 PM MDT (22:48 UTC)
Expired
May 3, 2007, 5:15 PM MDT
In force
27 min
Issued by
NWS Cheyenne, WY
Area
Counties, with a storm outline in the text

Counties Albany County, WY, Converse County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 161 km from the middle of the area, began a volume at 22:48 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
May 3, 2:49 PM MDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 10.8 hours before the alert went out and 258 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, Rapid City, SD at 12:00Z on 2007-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Rapid City, SD at 12:00Z on 2007-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1609 m above ground
0-6 km bulk shear
0 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
0 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.

000 
WUUS55 KCYS 032249
SVRCYS
WYC001-009-031-032315-
/O.NEW.KCYS.SV.W.0013.070503T2248Z-070503T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
448 PM MDT THU MAY 3 2007

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CONVERSE COUNTY IN EAST CENTRAL WYOMING...
  THIS INCLUDES THE CITY OF DOUGLAS...
  EXTREME NORTHEASTERN ALBANY COUNTY IN SOUTHEAST WYOMING...
  NORTHWESTERN PLATTE COUNTY IN SOUTHEAST WYOMING...

* UNTIL 515 PM MDT

* AT 444 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  ESTERBROOK...OR ABOUT 20 MILES SOUTH OF DOUGLAS...AND MOVING NORTH
  AT 70 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  DOUGLAS BY 500 PM MDT...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING.
TAKE COVER IN A STURDY STRUCTURE UNTIL THE STORM PASSES.

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
CHEYENNE AT 1-800-269-6220.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT 
THURSDAY EVENING FOR PORTIONS OF SOUTHEASTERN WYOMING.

LAT...LON 4231 10542 4229 10511 4293 10499 4293 10556

$$

JR
1 follow-up statement
000 
WWUS55 KCYS 032317
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
517 PM MDT THU MAY 3 2007

WYC001-009-031-032327-
/O.EXP.KCYS.SV.W.0013.000000T0000Z-070503T2315Z/
PLATTE WY-ALBANY WY-CONVERSE WY-
517 PM MDT THU MAY 3 2007

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CONVERSE...EXTREME
NORTHEASTERN ALBANY AND NORTHWESTERN PLATTE COUNTIES EXPIRED AT 515
PM MDT...

THE STORM HAS DECREASED IN INTENSITY AND IS NO LONGER SEVERE. 
THEREFORE...THE WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT
THURSDAY EVENING FOR SOUTHEASTERN WYOMING.

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
CHEYENNE AT 1-800-269-6220.

LAT...LON 4231 10542 4229 10511 4293 10499 4293 10556

$$

JR

The office that day

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

IssuedProductOfficeCountiesLasted
May 3, 4:00 AM MDTDense Fog AdvisoryCYS4 hr
May 3, 3:54 PM MDTSevere Thunderstorm WarningCYSConverse36 min
May 3, 3:59 PM MDTSevere Thunderstorm WarningCYSAlbany, Converse31 min
May 3, 4:25 PM MDTSevere Thunderstorm WarningCYSAlbany35 min
May 3, 5:03 PM MDTSevere Thunderstorm WarningCYSLaramie42 min
May 3, 5:16 PM MDTSevere Thunderstorm WarningCYSPlatte29 min
May 3, 5:41 PM MDTSevere Thunderstorm WarningCYSLaramie64 min
May 3, 5:44 PM MDTSevere Thunderstorm WarningCYSGoshen, Platte31 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2007Every severe thunderstorm warning 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.