Alert archive / California / Flash Flood Warnings in 2004
Flash Flood Warning 37, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Sep 30, 2004, 7:47 AM PDT for Inyo County, California. It was in force for 28 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
- Sep 30, 2004, 7:47 AM PDT (14:47 UTC)
- Expired
- Sep 30, 2004, 8:15 AM PDT
- In force
- 28 min
- Issued by
- NWS Las Vegas, NV
- Area
- Counties, with a storm outline in the text
County Inyo County, CA
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Mercury/Desert R, NV (KDRA), launched 12:00Z, 2.8 hours before the alert went out and 114 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
- 2502 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 159 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS55 KVEF 301456 FFWVEF CAC027-301515- /T.NEW.KVEF.FF.W.0016.040930T1447Z-040930T1515Z/ /0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED TEST...FLASH FLOOD WARNING...TEST NATIONAL WEATHER SERVICE LAS VEGAS NV 747 AM PDT THU SEP 30 2004 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL INYO COUNTY IN EASTERN CALIFORNIA * UNTIL 815 AM PDT * AT 737 AM PDT...THIS IS ONLY A TEST. * THIS IS ONLY A TEST.... THIS IS ONLY A TEST. LAT...LON 3633 11737 3623 11685 3663 11728 3651 11736 $$ BAILEY
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Las Vegas, NV wrote its last area forecast discussion before this flash flood warning went out at Sep 30, 3:10 AM PDT, 4 hours 37 minutes earlier.
Area forecast discussion, Sep 30, 3:10 AM PDT, 4 hours 37 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 310 AM PDT THU SEP 30 2004 .SYNOPSIS...A LOW PRESSURE SYSTEM THAT HAS BEEN OVER THE REGION WILL MOVE EAST THROUGH UTAH TODAY. ANOTHER WEAKER LOW WILL DROP TO OFF THE CENTRAL CALIFORNIA COAST THIS AFTERNOON...THEN GET PUSHED WESTWARD OVER THE PACIFIC AS A WEAK RIDGE BUILDS IN FROM ARIZONA. LINGERING MOISTURE WILL BRING A CHANCE FOR THUNDERSTORMS THURSDAY AND FRIDAY AFTERNOONS...MAINLY OVER THE HIGHER TERRAIN OF CENTRAL NEVADA AND CALIFORNIA. TEMPERATURES WILL REMAIN A FEW DEGREES BELOW NORMAL THROUGH THE END OF THE WEEK BEFORE RISING TO NEAR NORMAL FOR THE WEEKEND. && .SHORT TERM...UPPER LOW CENTER HAS MOVED INTO SOUTHWEST UTAH THIS MORNING PER WATER VAPOR IMAGERY. STILL QUITE A BIT OF CLOUD COVER LINGERING OVER SOUTHERN NEVADA AND NORTHWEST ARIZONA ASSOCIATED WITH MOISTURE WRAPPING AROUND THE BACKSIDE OF THE SYSTEM. MODELS ALL AGREE WITH MID LEVEL MOISTURE HANGING AROUND THIS AFTERNOON...BUT DISAGREE ON STABILITY. WILL LEAN MORE TOWARDS THE ETA SINCE THE GFS HAS REALLY UNDERDONE THE INSTABILITY THE PAST FEW AFTERNOONS. CAN SEE THE NEXT UPPER LEVEL DISTURBANCE DROPPING DOWN THE CALIFORNIA COAST THIS MORNING ON SATELLITE. MODELS HAVE INITIALIZED THIS FEATURE WELL...BUT THERE IS SOME DISAGREEMENT WITH HOW THEY HANDLE IT THROUGH SATURDAY. GFS AND LATEST UKMET STRETCH THE SYSTEM OUT AS IT MOVES INTO SOUTHERN CA TO DEVELOP A MORE ELONGATED TROUGH BY FRIDAY AFTERNOON...KEEPING A SHORTWAVE TROUGH UNDERNEATH THE RIDGE BUILDING INTO THE PACNW ON SATURDAY...THEN BUILDING A SHORTWAVE RIDGE OVER US ON SUNDAY. ETA/EURO/CANADIAN CONTINUE THE PREVIOUS TRACK OF TAKING ENERGY OFFSHORE AND CLOSING IT OFF...ALLOWING SHORTWAVE RIDGE TO BUILD OVER FORECAST AREA SATURDAY. EITHER WAY...ALL MODELS DISAGREE WITH EACH OTHER ON MOISTURE PLACEMENT BOTH FRIDAY AND SATURDAY AFTERNOONS. NOT SURE RIGHT NOW WHICH MODEL TO BELIEVE...BUT SINCE THERE WILL BE NOTHING TO SCOUR OUT CURRENT MOISTURE...WILL KEEP SLIGHT CHANCE MENTION OF TSTORMS OVER CENTRAL NEVADA AND CALIFORNIA. EXPECT THESE WILL MAINLY FORM OVER THE HIGHER TERRAIN FRIDAY UNLESS WE FIND SOMETHING TO PROVIDE BETTER LIFT. && .LONG TERM...MODELS IN FAIR AGREEMENT SUNDAY THROUGH WEDNESDAY. UPPER RIDGE DEVELOPS OVER THE AREA BY SUNDAY WITH DRY AND WARM CONDITIONS EXPECTED. TROUGH MOVES ACROSS CA AND INTO NV MONDAY BRINGING A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS ACROSS THE NORTHERN ZONES AND DOWN INTO NORTHERN MOHAVE COUNTY. ALTHOUGH THE GFS DOES NOT DEVELOP ANY MEASURABLE PRECIPITATION IT DOES INDICATE A FAIR AMOUNT OF MID LEVEL MOISTURE AND SOME INSTABILITY AND LIFT OVER THESE AREAS. AS THE TROUGH SLIDES EAST TOWARD THE ROCKIES TUESDAY MOST OF THE AREA WILL BE DRY. THERE IS SOME LINGERING MOISTURE INDICATED OVER LINCOLN AND NORTHERN MOHAVE COUNTY SO WILL KEEP A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS THERE. ANOTHER RIDGE IS EXPECTED OVER THE AREA WEDNESDAY FOR ANOTHER DRY AND WARM DRY OVER THE ENTIRE FORECAST AREA. && .AVIATION...TAF ADEQUATELY COVERS ALL SIGNIFICANT WEATHER EXPECTED AT KLAS. && .VEF WATCHES/WARNINGS/ADVISORIES... .NV...NONE. .AZ...NONE. .CA...NONE. && DAVIS/HARRISON
Nearby
Flash Flood Warnings in California, 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.