Alert archive / Nevada / Flash Flood Warnings in 2007
Flash Flood Warning 40, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 27, 2007, 8:42 AM PDT for Clark County, Nevada. It took effect at Aug 27, 2007, 8:48 AM PDT. It was in force for 117 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
- Aug 27, 2007, 8:42 AM PDT (15:42 UTC)
- In effect from
- Aug 27, 2007, 8:48 AM PDT
- Expired
- Aug 27, 2007, 10:45 AM PDT
- In force
- 117 min
- Issued by
- NWS Las Vegas, NV
- Area
- Whole counties
County Clark County, NV
The radar
The Las Vegas radar (KESX), 58 km from the middle of the area, began a volume at 15:45 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
Mercury/Desert R, NV (KDRA), launched 12:00Z, 3.7 hours before the alert went out and 99 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
- 85 J/kg
- Mixed-layer CIN
- -197 J/kg
- Mixed-layer LCL
- 1937 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS55 KVEF 271548 FFWVEF NVC003-271745- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 842 AM PDT MON AUG 27 2007 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS EXTENDED THE * FLASH FLOOD WARNING FOR... CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 1045 AM PDT. * AT 839 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED MODERATE TO HEAVY RAINFALL FROM A THUNDERSTORM OVER THE SOUTHWEST PORTION OF THE LAS VEGAS VALLEY NEAR SPRING VALLEY. THE STORM WAS MOVING NORTHEAST AT 15 MPH AND WILL IMPACT THE LAS VEGAS STRIP AND DOWNTOWN BETWEEN 900 AND 930 AM PDT. THIS ADDITIONAL RAINFALL WILL AGGRAVATE THOSE AREAS THAT HAVE ALREADY OBSERVED FLASH FLOODING. RUNOFF FROM EARLIER RAINFALL CONTINUES TO PRODUCE FLOODING PARTICULARLY ALONG KOVAL LANE JUST TO THE EAST OF THE LAS VEGAS STRIP. * OTHER LOCATIONS IMPACTED INCLUDE...DOWNTOWN LAS VEGAS...NWS LAS VEGAS...SPRING VALLEY...STRATOSPHERE TOWER...THE LAKES...THE STRIP AND UNLV. ADDITIONAL RAINFALL AMOUNTS OF ONE QUARTER TO ONE HALF INCH ARE LIKELY WITH LOCALIZED HIGHER AMOUNTS IN THE WARNED AREA. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. TURN AROUND...DONT DROWN. DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. SEVERAL INCHES OF RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE. TURN AROUND...DONT DROWN. LAT...LON 3596 11534 3611 11506 3624 11510 3616 11534 $$ SC
2 follow-up statements
000 WGUS75 KVEF 271706 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 955 AM PDT MON AUG 27 2007 NVC003-271745- CLARK NV- 955 AM PDT MON AUG 27 2007 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 AM PDT FOR CENTRAL CLARK COUNTY... AT 955 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE MAIN AREA OF THUNDERSTORMS IS CONTINUING TO MOVE AWAY FROM THE LAS VEGAS VALLEY AND INTO ARIZONA. RUNOFF CONTINUES TO PRODUCE FLOODING FROM EARLIER RAINFALL BUT THIS FLOODING HAS BEEN SUBSIDING AND THAT TREND IS EXPECTED TO CONTINUE. THE FLAMINGO AND TROPICANA WASHES CONTINUE TO RUN VERY HIGH IN AND AROUND THE LAS VEGAS STRIP. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THE LAKES AND THE LAS VEGAS VEGAS STRIP. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. LAT...LON 3596 11534 3611 11506 3624 11510 3616 11534 $$ SC
000 WGUS75 KVEF 271743 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1043 AM PDT MON AUG 27 2007 NVC003-271748- CLARK NV- 1043 AM PDT MON AUG 27 2007 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 1045 AM PDT(1045 AM MST) FOR CENTRAL CLARK COUNTY... THUNDERSTORM ACTIVITY HAS ENDED ACROSS CENTRAL CLARK COUNTY WITH LITTLE ADDITIONAL RAINFALL BEING REPORTED DURING THE PAST HOUR. THIS HAS ALLOWED FOR THE ENDING OF THE FLOOD WARNING FOR THE AREA. ALTHOUGH THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE...MANY OF THE AREAS WASHES ESPECIALLY OVER THE EASTERN PORTION OF THE LAS VEGAS VALLEY...WILL CONTINUE TO CONTAIN RUNOFF THROUGH THE REMAINDER OF THE MORNING AND INTO EARLY AFTERNOON. IN ADDITION...PONDING OF WATER WILL LIKELY BE ENCOUNTERED FOR SEVERAL HOURS. MOTORIST ARE STILL URGED TO USE CAUTION THROUGH THE AFTERNOON AS THE WATER RECEDES FROM THE AREA. LAT...LON 3596 11534 3611 11506 3624 11510 3616 11534 $$ JENSEN
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 3:12 AM PDT | Flash Flood Warning | VEF | Clark | 93 min |
| Aug 27, 3:54 AM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| Aug 27, 4:40 AM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| Aug 27, 6:44 AM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
Nearby
Flash Flood Warnings in Nevada, 2007Every flash flood warning in 2007
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.