Alert archive / Wyoming / Flash Flood Warnings in 2004

Flash Flood Warning 1, NWS Cheyenne, WY

June 29, 2004Albany County, Wyoming

NWS Cheyenne, WY issued this flash flood warning at Jun 29, 2004, 7:42 PM MDT for Albany County, Wyoming. It was in force for 2 hr. 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 29, 2004, 7:42 PM MDT (01:42 UTC)
Expired
Jun 29, 2004, 9:45 PM MDT
In force
2 hr
Issued by
NWS Cheyenne, WY
Area
Counties, with a storm outline in the text

County Albany County, WY

The radar

The Cheyenne radar (KCYS), 104 km from the middle of the area, began a volume at 01:44 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 00:00Z, 1.7 hours before the alert went out and 262 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 00:00Z on 2004-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 22 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 00:00Z on 2004-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
22 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
3053 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
24 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 
WGUS55 KCYS 300142
FFWCYS
WYC001-300345-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
742 PM MDT TUE JUN 29 2004

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN ALBANY COUNTY IN SOUTHEAST WYOMING

* UNTIL 945 PM MDT

* AT 736 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM NEAR WHEATLAND RESERVOIR #3...OR
  ABOUT 36 MILES WEST OF WHEATLAND.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BALDY
  PEAK...BIG CHARLIE LAKES...SODA LAKE...ROCK RIVER...GARRETT AND
  BOSLER.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

LAT...LON 4144 10600 4144 10529 4224 10531 4238 10604

$$

GRIFFITH
1 follow-up statement
000 
WGUS75 KCYS 300348
FFSCYS
WYC001-300645-

FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
948 PM MDT TUE JUN 29 2004

...THE FLOOD WARNING HAS BEEN CANCELLED FOR THE FOLLOWING AREA...
ALBANY...

THE FLASH FLOOD WARNING FOR NORTHERN ALBANY COUNTY HAS BEEN
CANCELLED.  NO FLOODING WAS REPORTED.

$$
GRIFFITH

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 5:22 PM MDTSevere Thunderstorm WarningCYSLaramie53 min
Jun 30, 5:39 PM MDTFlash Flood WarningCYSLaramie111 min

Nearby

Flash Flood Warnings in Wyoming, 2004Every flash flood 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.