Alert archive / Arizona / Flash Flood Warnings in 2016
Flash Flood Warning 91, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 18, 2016, 5:26 PM MST for Mohave County, Arizona; San Bernardino County, California. It was in force for 2 hr. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 18, 2016, 5:26 PM MST (00:26 UTC)
- Expired
- Aug 18, 2016, 7:30 PM MST
- In force
- 2 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
Counties Mohave County, AZ, San Bernardino County, CA
The radar
The Las Vegas radar (KESX), 113 km from the middle of the area, began a volume at 00:28 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 |
|---|---|---|---|
| Aug 18, 5:50 PM MST | FLASH FLOOD | 7 S Needles, CA | CALIFORNIA HIGHWAY PATROL REPORTS A VEHICLE STUCK IN FLOOD WATERS ON US HIGHWAY 95 AT MILE MARKER 51. |
| Aug 18, 6:31 PM MST | FLASH FLOOD | 22 S Needles, CA | US HIGHWAY 95 CLOSED FROM VIDAL JUNCTION TO INTERSTATE 40 FROM FLASH FLOODING NEAR MILE MARKERS 35 AND 51. AT MILE MARKER 51...ONE FOOT OF RUNNING WATER WAS ACROSS THE ROADWAY AND NEARLY THREE FEET OF ROAD WAS WASHED AWAY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 00:00Z, 0.4 hours before the alert went out and 205 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
- 142 J/kg
- Mixed-layer CIN
- -113 J/kg
- Mixed-layer LCL
- 3449 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
457 WGUS55 KVEF 190026 FFWVEF AZC015-CAC071-190230- /O.NEW.KVEF.FF.W.0091.160819T0026Z-160819T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 526 PM PDT THU AUG 18 2016 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHWESTERN MOHAVE COUNTY IN NORTHWESTERN ARIZONA... EAST CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 730 PM PDT/730 PM MST/ * AT 525 PM PDT/525 PM MST/...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN FROM HIGHWAY 95 SOUTH OF NEEDLES TO THE OATMAN TOPOCK HIGHWAY. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... TOPOCK...NEEDLES...ARIZONA VILLAGE AND MOHAVE VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED ROADS. FIND AN ALTERNATE ROUTE. && LAT...LON 3490 11432 3458 11438 3444 11473 3487 11472 $$ MORGAN
2 follow-up statements
907 WGUS75 KVEF 190111 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 611 PM PDT THU AUG 18 2016 AZC015-CAC071-190230- /O.CON.KVEF.FF.W.0091.000000T0000Z-160819T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-SAN BERNARDINO CA- 611 PM PDT THU AUG 18 2016 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM PDT/730 PM MST/ FOR SOUTHWESTERN MOHAVE AND EAST CENTRAL SAN BERNARDINO COUNTIES... AT 610 PM PDT/610 PM MST/...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ON HIGHWAY 95 SOUTH OF NEEDLES. THE CALIFORNIA HIGHWAY PATROL REPORTED FLOODING ON THE HIGHWAY AT MILE MARKERS 35 AND 51 WITH AT LEAST ONE VEHICLE STUCK IN THE WATER. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... TOPOCK...NEEDLES...ARIZONA VILLAGE AND MOHAVE VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED ROADS. FIND AN ALTERNATE ROUTE. && LAT...LON 3490 11432 3458 11438 3444 11473 3487 11472 $$ MORGAN
899 WGUS75 KVEF 190223 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 723 PM PDT THU AUG 18 2016 AZC015-CAC071-190232- /O.EXP.KVEF.FF.W.0091.000000T0000Z-160819T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-SAN BERNARDINO CA- 723 PM PDT THU AUG 18 2016 ...THE FLASH FLOOD WARNING FOR SOUTHWESTERN MOHAVE AND EAST CENTRAL SAN BERNARDINO COUNTIES WILL EXPIRE AT 730 PM PDT/730 PM MST/... HEAVY RAIN IS PERSISTING OVER HIGHWAY 95. THIS FLASH FLOOD WARNING HAS BEEN REPLACED WITH ANOTHER WARNING VALID UNTIL 1030 PM PDT. LAT...LON 3490 11432 3458 11438 3444 11473 3487 11472 $$ MORGAN
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 6:08 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 18, 7:21 PM MST | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 18, 9:06 PM MST | Flash Flood Warning | VEF | San Bernardino | 114 min |
| Aug 19, 2:44 PM MST | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 19, 4:41 PM MST | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
Nearby
Flash Flood Warnings in Arizona, 2016Flash Flood Warnings in California, 2016Every flash flood warning in 2016
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.