Alert archive / Wyoming / Severe Thunderstorm Warnings in 2005
Severe Thunderstorm Warning 33, NWS Riverton, WY
NWS Riverton, WY issued this severe thunderstorm warning at Jun 24, 2005, 2:58 PM MDT for Washakie County, Wyoming. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 24, 2005, 2:58 PM MDT (20:58 UTC)
- Expired
- Jun 24, 2005, 3:45 PM MDT
- In force
- 47 min
- Issued by
- NWS Riverton, WY
- Area
- Counties, with a storm outline in the text
County Washakie County, WY
The radar
The Riverton/Lander radar (KRIW), 113 km from the middle of the area, began a volume at 21:01 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 |
|---|---|---|---|
| Jun 24, 1:35 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 9.0 hours before the alert went out and 385 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1357 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -26 m²/s²
- 0-3 km storm-relative helicity
- 180 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Riverton, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 23, 4:12 PM MDT, 22 hours 46 minutes earlier.
Area forecast discussion, Jun 23, 4:12 PM MDT, 22 hours 46 minutes before
AREA FORECAST DISCUSSION... NATIONAL WEATHER SERVICE RIVERTON WY 412 PM MDT THU JUN 23 2005 .SHORT TERM...TONIGHT THROUGH SUNDAY... WITH FORECAST CAPE VALUES EXCEEDING 1000 WESTERN WYOMING...ANOTHER ROUND OF AFTERNOON AND EVENING THUNDERSTORMS WERE SPAWNED AS THE RING OF FIRE CONTINUES OVER THE WESTERN STATES. THE MOIST SW FLOW ALOFT WILL VEER OVERNIGHT...BECOMING NEARLY ZONAL AS THE CLOSED LOW IN THE BASE OF THE OFFSHORE PACIFIC TROUGH MOVES TOWARDS THE COASTAL STATES. THE UPPER LEVEL FLOW OVER OUR AREA BECOMES DRIER AND NEARLY ZONAL FRIDAY AHEAD OF THE TROUGH AND CLOSED LOW WHICH MOVE ONSHORE FRIDAY NIGHT. THE ENTRAINED MOISTURE WILL NOT DECREASE UNTIL LATE FRIDAY AFTERNOON...SO EXPECT ANOTHER ROUND OF THUNDERSTORMS LATE FRIDAY MORNING AND AFTERNOON. AS THE LOW DIGS INTO THE CENTRAL CALIFORNIA AREA SATURDAY...THE FLOW BACKS TO THE SOUTHWEST...AND TWO SHOTS OF MOISTURE ARE ADVECTED INTO SW WYOMING. THE FIRST SHOULD ARRIVE BY SATURDAY MORNING...FOLLOWED BY THE SECOND MORE MOIST WIDESPREAD SHOT SATURDAY AFTERNOON AND EVENING...BOTH TRIGGERING SHOWERS AND THUNDERSTORMS OVER OUR CWFA THROUGH THE WEEKEND. .LONG TERM...SUNDAY NIGHT THROUGH THURSDAY... LATEST GFS SIMILAR WITH PAST RUN WITH A SHIFT OF PATTERN EXPECTED INTO EARLY NEXT WEEK. HOT UPPER RIDGE DRIFTS INTO EASTERN U.S. WITH SUBSEQUENT TROUGH ALONG WEST COAST SHIFTING INTO ROCKIES. THE SUB-TROPICAL MOISTURE WILL CONTINUE TO FLOW OVER AREA IN SOUTHWEST FLOW AHEAD OF SYSTEM SUNDAY INTO MONDAY. HAVE THEREFORE CONTINUED WITH MAINLY LATE DAY STORMS ACROSS THE AREA INTO MONDAY NIGHT. TROUGH AXIS MOVES ACROSS REGION EARLY TUESDAY WITH TRANSITION TO WEST NORTHWEST FLOW. HAVE MAINTAINED TRENDS OF ISOLATED STORM RISK IN THE MORE FAVORABLE NORTHWEST MOUNTAINS CONTINUING INTO TUESDAY AND WEDNESDAY. AT THIS TIME...BRIEF UPPER RIDGING ADVERTISED ON THURSDAY AHEAD OF ANOTHER TROUGH MOVING INTO WEST COAST...SO WILL KEEP A DRY FORECAST. TEMPERATURES NOT QUITE AS HOT INTO MONDAY WITH SUB-TROPICAL MOISTURE RESULTING IN LESS INSOLATION. TEMPERATURES LOOK TO COOL AROUND 5 DEGREE TUESDAY BEHIND COLD FRONTAL PASSAGE...THEN WENT WITH A GRADUAL WARMING AGAIN INTO THURSDAY. && .RIW WATCHES/WARNINGS/ADVISORIES... .WY...NONE. && SHORT TERM...CF LONG TERM....FRIEDERS
The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 7:58 PM MDT | Severe Thunderstorm Warning | RIW | Teton | 47 min |
| Jun 24, 2:15 PM MDT | Severe Thunderstorm Warning | RIW | Hot Springs, Washakie | 45 min |
| Jun 24, 3:44 PM MDT | Severe Thunderstorm Warning | RIW | Washakie | 19 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 2005Every severe thunderstorm warning in 2005
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.