Alert archive / Wyoming / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 2, NWS Cheyenne, WY

May 10, 2004Platte County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at May 10, 2004, 4:45 PM MDT for Platte County, Wyoming. It was in force for 30 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 10, 2004, 4:45 PM MDT (22:45 UTC)
Expired: May 10, 2004, 5:15 PM MDT
In force: 30 min
Issued by: NWS Cheyenne, WY
Area: Counties, with a storm outline in the text

County Platte County, WY

The radar

The Cheyenne radar (KCYS), 154 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.

Issued	Product	Office	Lasted
May 10, 2:35 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 10.8 hours before the alert went out and 243 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: 1496 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 177 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.

104 
WUUS55 KCYS 102245
SVRCYS

ZCZC DEF
TTAA00 KCYS 102243

WYC031-102315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
445 PM MDT MON MAY 10 2004

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL PLATTE COUNTY IN SOUTHEAST WYOMING

* UNTIL 515 PM MDT

* AT 445 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DIME SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR GLENDO...OR ABOUT 26 MILES SOUTHEAST OF
  DOUGLAS...AND MOVING NORTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GLENDO RESERVOIR BY 450 PM MDT

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

THIS WARNING REPLACES THE PREVIOUSLY ISSUED WARNING FOR NORTHERN 
PLATTE COUNTY.

LAT...LON 4251 10513 4243 10491 4260 10469 4259 10515

$$

RUBIN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 3:45 PM MDT	Severe Thunderstorm Warning	CYS	Platte	60 min
May 10, 5:03 PM MDT	Severe Thunderstorm Warning	CYS	Converse	57 min
May 10, 5:14 PM MDT	Severe Thunderstorm Warning	CYS	Platte	61 min
May 10, 5:16 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	44 min
May 10, 5:35 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	55 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2004 Every severe thunderstorm warning in 2004

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.