Alert archive / Wyoming / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 1, NWS Riverton, WY
NWS Riverton, WY issued this severe thunderstorm warning at Feb 14, 2000, 4:54 PM MST for Lincoln County, Teton County, Wyoming. It was in force for 61 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Feb 14, 2000, 4:54 PM MST (23:54 UTC)
- Expired
- Feb 14, 2000, 5:55 PM MST
- In force
- 61 min
- Issued by
- NWS Riverton, WY
- Area
- Whole counties
Counties Lincoln County, WY, Teton County, WY
The radar
The Pocatello radar (KSFX), 167 km from the middle of the area, began a volume at 23:57 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 14, 5:35 PM MST | Thunderstorm Wind 57 M | Jackson Arpt, WY |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 11.9 hours before the alert went out and 181 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
- 1766 m above ground
- 0-6 km bulk shear
- 89 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 218 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KRIW 150003 COR SVRRIW WYC023-039-150055- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING...COR NATIONAL WEATHER SERVICE RIVERTON WY 454 PM MST MON FEB 14 2000 THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN LINCOLN COUNTY IN SOUTHWESTERN WYOMING TETON COUNTY IN NORTHWESTERN WYOMING * UNTIL 555 PM MST * AT 455 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 20 MILES WEST OF JACKSON AND AFTON... MOVING EAST- NORTHEAST AT 40 TO 45 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... JACKSON AT 515 PM MST AFTON AT 520 PM MST THIS STORM HAS A HISTORY OF DAMAGING WIND. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS! VALONE WCJIN-WYNW-WYSW
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 Feb 14, 2:30 PM MST, 2 hours 24 minutes earlier.
Area forecast discussion, Feb 14, 2:30 PM MST, 2 hours 24 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RIVERTON WY 230 PM MST MON FEB 14 2000 PER WATER VAPOR...UPPER LOW SPINNING EAST ACROSS SOUTH CENTRAL OREGON AT 20Z. LARGE WARM ADVECION CLOUD SHIELD OVER MONTANA AND WYOMING AFTER LEAVING 6 TO 12 INCHES OF SNOW OVER FAR WEST VALLEYS AND WEST MOUNTAINS THIS MORNING. NEXT AREA OF PRECIPITATION MOVING INTO EASTERN IDAHO ASSOCIATED WITH STRONG LIFT/INSTABILITY AHEAD OF OREGON SHORTWAVE. RADAR/LIGHTNING DATA SHOWING SOME 45+ DBZ RETURNS AND NUMEROUS LIGHTNING STRIKES OVER SOUTHWEST IDAHO. WIDESPREAD SNOWFALL WILL RETURN TO THE FAR WEST BY ISSUANCE WITH HEAVIEST BAND OF SNOWFALL REACHING WESTERN BORDER AROUND 02Z. ETA SEEMS TO BE TRACKING VORT CENTER BEST BASED ON EXTRAPOLATION... TAKING IT INTO NORTH CENTRAL WYOMING BY 06Z AND TO EASTERN WYOMING BORDER AT 12Z. ALSO ETA SURFACE PROGS PREFERRED AS LATEST SURFACE ANALYSIS SHOWS LOW CENTER...BIGGEST PRESSURE FALLS OVER IDAHO PANHANDLE NEAR ETAS 00Z POSITION. SURFACE LOW THEN REDEVELOPS EAST OF DIVIDE JUST NORTH OF SHERIDAN AT 15/06Z AND THEN QUICKLY MOVES SOUTHEAST INTO SOUTH DAKOTA. WITH TROUGH PASSAGE IN THE FAR WEST LATE THIS EVENING...NEGATIVE LI/S REMAIN OVER AREA ALONG WITH OROGRAPHIC LIFT AND HIGH OMEGA VALUES...BUT HEAVIEST SNOWFALL WILL OCCUR UPSTREAM OF TROUGH AXIS THIS EVENING. WILL KEEP CURRENT WINTER STORM WARNINGS AND ADVISORIES GOING THROUGH THE NIGHT IN WESTERN ZONES WITH ONLY CHANGE TO DROP ZONE 10 OUT OF HIGHLIGHTS. IN EAST MAIN PROBLEM WILL BE WINDS WHICH HAVE JUST BEGUN TO PICK UP IN MOST AREAS AND STILL HOLDING OUT FOR CODY AND SOME OTHER NORTHERN ZONES. HIGH WINDS ALREADY VERIFIED IN WARNED ZONES 14 AND 15 TODAY WITH MID LEVEL WINDS AND SUBSIDENCE PROGGED TO INCREASE THROUGH THIS EVENING. THEREFORE WILL KEEP HIGH WIND WARNING GOING THROUGH THE EVENING WITH DECREASING WINDS AFTER TROUGH PASSAGE AROUND MIDNIGHT. DRYING AND SUBSIDENCE BEHIND EXITING SHORTWAVE TUESDAY FOR MOSTLY SUNNY WITH SOME LINGERING WIND MAINLY RKS AND CPR. A SHORTWAVE IS PROGGED TO MOVE THROUGH COLORADO TUESDAY NIGHT WITH SOME LIFT/DYNAMICS OVER SOUTHWEST/SOUTHCENTRAL WYOMING AND WILL ADD SCATTERED POPS TO THIRD PERIOD THERE. AFTERWARDS...WEDNESDAY LOOKS BENIGN ALTHOUGH AVIATION IS COVERING JUST ABOUT THE ENTIRE ROCKY MOUNTAIN REGION WITH CLOUDS AND PRECIPITATION BETWEEN WEAKENING UPPER LOW MOVING INTO CALIFORNIA IN SOUTHERN STREAM AND WEAK TROUGH OVER MONTANA IN NORTHERN STREAM. MRF MOVES A BACKDOOR COLD FRONT THROUGH THE STATE WEDNESDAY NIGHT AND THURSDAY BUT CONFIDENCE IS LOW IN UPPER LEVEL PATTERN THAT LOOKS CHAOTIC...SPLITTING NORTHERN STREAM ENERGY INTO SEVERAL PIECES. GENERALLY DRY FORECAST FRIDAY AND SATURDAY. .RIW...WINTER STORM WARNING FAR W MTNS THROUGH TNGHT...ZNS1>3..6.. 17..19. SNOW AND BLOWING SNOW ADVSRY FAR W VALLEYS AND EASTERN WIND RIVER MTNS THROUGH TNGHT...ZNS 7..11..16..18..20. HIGH WIND WARNING NATRONA CNTY AND GREEN MTNS THIS EVG...ZNS 14..15. AEM
Nearby
Severe Thunderstorm Warnings in Wyoming, 2000Every severe thunderstorm warning in 2000
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.