Alert archive / Arizona / Flash Flood Warnings in 2016
Flash Flood Warning 54, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 2, 2016, 2:41 AM MST for Mohave County, Arizona; San Bernardino County, California. It was in force for 3 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 2, 2016, 2:41 AM MST (09:41 UTC)
- Expired
- Aug 2, 2016, 5:45 AM MST
- In force
- 3 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), 128 km from the middle of the area, began a volume at 09:43 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 2, 3:15 AM MST | FLOOD | 2 Ene Lake Havasu City, AZ | SMALL ROCKS AND DEBRIS AT INTERSECTION OF MCCULLOCH BLVD AND JAMAICA BLVD. REPORT VIA SOCIAL MEDIA. |
| Aug 2, 3:30 AM MST | FLASH FLOOD | 4 S Yucca, AZ | ARIZONA DOT REPORTS 3 TO 4 FEET OF STANDING WATER AT MILEPOST 21 ON INTERSTATE 40. |
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, 9.7 hours before the alert went out and 223 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
- 916 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 2541 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted.
332 WGUS55 KVEF 020941 FFWVEF AZC015-CAC071-021245- /O.NEW.KVEF.FF.W.0054.160802T0941Z-160802T1245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 241 AM PDT TUE AUG 2 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 545 AM PDT/545 AM MST/ * AT 238 AM PDT/238 AM MST/...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN EXTENDING FROM NEAR YUCCA SOUTH TO LAKE HAVASU CITY. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... LAKE HAVASU CITY...YUCCA...HIGHWAY 95...AND DESERT HILLS. PRECAUTIONARY/PREPAREDNESS ACTIONS... TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. 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 3492 11396 3439 11395 3439 11449 3495 11448 $$ JS
3 follow-up statements
894 WGUS75 KVEF 021052 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 352 AM PDT TUE AUG 2 2016 AZC015-CAC071-021245- /O.CON.KVEF.FF.W.0054.000000T0000Z-160802T1245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-SAN BERNARDINO CA- 352 AM PDT TUE AUG 2 2016 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 AM PDT/545 AM MST/ FOR SOUTHWESTERN MOHAVE AND EAST CENTRAL SAN BERNARDINO COUNTIES... AT 349 AM PDT/349 AM MST/...DOPPLER RADAR INDICATED THUNDERSTORMS WERE MOVING AWAY FROM THE LAKE HAVASU CITY AREA. HOWEVER, VERY HEAVY RAIN FELL THERE, WITH ONE GAGE RECORDING OVER AN INCH AND A HALF IN LESS THAN AN HOUR. VERY HEAVY RAIN ALSO FELL JUST SOUTH OF YUCCA EARLIER, BETWEEN INTERSTATE 40 AND CHICKEN SPRINGS ROAD. RUNOFF IS LIKELY STILL OCCURRING, SO THE FLASH FLOOD WARNING REMAINS IN EFFECT. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... LAKE HAVASU CITY...YUCCA...TOPOCK AND DESERT HILLS. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED ROADS. FIND AN ALTERNATE ROUTE. && LAT...LON 3492 11396 3439 11395 3439 11449 3495 11448 $$ MORGAN
262 WGUS75 KVEF 021142 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 442 AM PDT TUE AUG 2 2016 AZC015-CAC071-021245- /O.CON.KVEF.FF.W.0054.000000T0000Z-160802T1245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-SAN BERNARDINO CA- 442 AM PDT TUE AUG 2 2016 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 AM PDT/545 AM MST/ FOR SOUTHWESTERN MOHAVE AND EAST CENTRAL SAN BERNARDINO COUNTIES... AT 438 AM PDT/438 AM MST/...DOPPLER RADAR INDICATED THAT HEAVY RAIN HAD ENDED IN THE YUCCA AND LAKE HAVASU CITY AREAS. HOWEVER, THE ARIZONA DEPARTMENT OF TRANSPORTATION REPORTED THREE TO FOUR FEET OF STANDING WATER ON INTERSTATE 40 NEAR MILE MARKER 21 AT 330 AM MST, AND AN UNKNOWN AMOUNT OF STANDING WATER IN LAKE HAVASU CITY ON HIGHWAY 95 NEAR PALO VERDE BOULEVARD. FLOODING WILL CONTINUE UNTIL RUNOFF FROM EARLIER HEAVY RAIN IS COMPLETE. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... LAKE HAVASU CITY...YUCCA...TOPOCK AND DESERT HILLS. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. 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 3492 11396 3439 11395 3439 11449 3495 11448 $$ MORGAN
995 WGUS75 KVEF 021237 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 537 AM PDT TUE AUG 2 2016 AZC015-CAC071-021245- /O.EXP.KVEF.FF.W.0054.000000T0000Z-160802T1245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-SAN BERNARDINO CA- 537 AM PDT TUE AUG 2 2016 ...THE FLASH FLOOD WARNING FOR SOUTHWESTERN MOHAVE AND EAST CENTRAL SAN BERNARDINO COUNTIES WILL EXPIRE AT 545 AM PDT/545 AM MST/... THE ARIZONA DEPARTMENT OF TRANSPORTATION REPORTED THAT THE FLOOD WATERS IN LAKE HAVASU CITY AND ON INTERSTATE 40 NEAR YUCCA HAVE RECEDED. FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES. LAT...LON 3492 11396 3439 11395 3439 11449 3495 11448 $$ MORGAN
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 7:34 PM MST | Areal Flood Advisory | VEF | Mohave | 4 hr |
| Aug 1, 11:50 PM MST | Areal Flood Advisory | VEF | Mohave | 3 hr |
| Aug 2, 12:50 AM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 2, 2:03 AM MST | Areal Flood Warning | VEF | Mohave | 24 hr |
| Aug 2, 3:04 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 2, 3:11 AM MST | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 2, 1:56 PM MST | Severe Thunderstorm Warning | VEF | San Bernardino | 49 min |
| Aug 2, 2:38 PM MST | Flash Flood Warning | VEF | San Bernardino | 6 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.