Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 12, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 13, 2012, 5:35 PM PDT for San Bernardino County, California; Mohave County, Arizona. It was in force for 115 min. 5 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
- Jul 13, 2012, 5:35 PM PDT (00:35 UTC)
- Expired
- Jul 13, 2012, 7:30 PM PDT
- In force
- 115 min
- 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), 144 km from the middle of the area, began a volume at 00:35 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 |
|---|---|---|---|
| Jul 13, 5:40 PM PDT | FLASH FLOOD | 5 Ne Lake Havasu City, AZ | RUNNING WATER UP TO 8 INCHES DEEP ON THE ROAD CARRYING SMALL ROCKS. |
| Jul 13, 6:00 PM PDT | FLASH FLOOD | 4 Ene Lake Havasu City, AZ | MAJOR ROAD FLOODING WITH SOME ROADS CLOSED. SPOTTER RECEIVED .44 INCHES OF RAIN IN A 20 MINUTE PERIOD AND WOULD NOT ATTEMPT CROSSING A FLOODED ROADWAY IN A LARGE 4X4 VEHICLE. |
| Jul 13, 6:00 PM PDT | FLASH FLOOD | Lake Havasu City, AZ | FLASH FLOODING RESULTED IN A TOTAL OF 9 SWIFTWATER RESCUES IN LAKE HAVASU CITY INVOLVING AT LEAST 11 PEOPLE. A FEW HOMES WERE FLOODED. RUNOFF INTO WASHES FILLED ROTARY PARK WITH MUD AND UNDERMINED SIDEWALKS NEAR THE PARK. DEBRIS FROM WASHES FLOWED INTO LAKE HA |
| Jul 13, 6:00 PM PDT | HEAVY RAIN 2 | Lake Havasu City, AZ | HEAVY RAIN RESULTED IN THE COLLAPSE OF THE ROOF ON A HOME IN LAKE HAVASU CITY DAMAING THE DINING ROOM OF THE HOME. |
| Jul 13, 6:23 PM PDT | FLASH FLOOD | 5 N Lake Havasu City, AZ | REPORTS OF SWIFT WATER RESCUES IN PROGRESS IN LAKE HAVASU CITY. CARS AND MOTORCYCLES SWEPT AWAY BY SWIFT MOVING WATER. |
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, 0.6 hours before the alert went out and 238 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
- 90 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 1887 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
085 WGUS55 KVEF 140035 FFWVEF AZC015-CAC071-140230- /O.NEW.KVEF.FF.W.0012.120714T0035Z-120714T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 535 PM MST FRI JUL 13 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHWESTERN MOHAVE COUNTY IN NORTHWEST ARIZONA... EXTREME SOUTHEASTERN SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 730 PM MST/730 PM PDT/. * AT 526 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR LAKE HAVASU CITY. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE... LAKE HAVASU CITY AND HAVASU FALLS RV RESORT. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3463 11430 3455 11406 3430 11428 3440 11446 $$ JENSEN
2 follow-up statements
998 WGUS75 KVEF 140132 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 632 PM MST FRI JUL 13 2012 AZC015-CAC071-140230- /O.CON.KVEF.FF.W.0012.000000T0000Z-120714T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-SAN BERNARDINO CA- 632 PM MST FRI JUL 13 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM MST/730 PM PDT/ FOR EXTREME SOUTHEASTERN SAN BERNARDINO AND SOUTHWESTERN MOHAVE COUNTIES... AT 622 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING LOCALLY HEAVY RAINFALL. THIS STORM WAS LOCATED NEAR LAKE HAVASU CITY. THE THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY STATIONARY. REPORTS FROM THE AREA INDICATE THAT SWIFT WATER RESCUES ARE TAKING PLACE. ADDITIONAL THUNDERSTORMS ARE FORMING TO THE SOUTH OF LAKE HAVASU AND MAY MOVE INTO THE AREA BY 7 PM PDT / MST WHICH COULD BRING ADDITIONAL HEAVY RAINFALL TO THE AREA. LOCATIONS IMPACTED INCLUDE... LAKE HAVASU AND HAVASU FALLS RV RESORT. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3463 11430 3455 11406 3430 11428 3440 11446 $$ JENSEN
471 WGUS75 KVEF 140225 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 725 PM MST FRI JUL 13 2012 AZC015-CAC071-140232- /O.EXP.KVEF.FF.W.0012.000000T0000Z-120714T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-SAN BERNARDINO CA- 725 PM MST FRI JUL 13 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 730 PM MST/730 PM PDT/ FOR EXTREME SOUTHEASTERN SAN BERNARDINO AND SOUTHWESTERN MOHAVE COUNTIES... THUNDERSTORMS HAVE DISSIPATED OVER THE AREA AND ALTHOUGH LIGHT RAIN SHOWERS MAY STILL FALL THROUGH THE EVENING...ADDITIONAL HEAVY RAINFALL IS NOT EXPECTED AT THIS TIME. HOWEVER THERE CONTINUES TO BE A CHANCE OF THUNDERSTORMS OVER THE AREA THROUGH THE NIGHT. ALTHOUGH THE HEAVY RAINFALL HAS STOPPED AT THIS TIME...FLOWING WATER WILL LIKELY BE SEEN IN THE NORMALLY DRY WASHES THROUGH THE EVENING...WHILE PONDING OF WATER WILL ALSO LIKELY BE ENCOUNTERED IN LOW LYING AREAS. TRAVELERS ARE URGED TO CONTINUE USING CAUTION THROUGH THE NIGHT AS WATER IS ESPECIALLY DIFFICULT TO SEE DURING THE NIGHTTIME HOURS. LAT...LON 3463 11430 3455 11406 3430 11428 3440 11446 $$ JENSEN
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 5:55 PM PDT | Flash Flood Warning | VEF | Inyo | 2 hr |
| Jul 13, 6:00 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 13, 7:20 PM PDT | Flash Flood Warning | VEF | San Bernardino | 115 min |
| Jul 13, 8:00 PM PDT | Flash Flood Warning | VEF | San Bernardino | 61 min |
| Jul 13, 8:50 PM PDT | Flash Flood Warning | VEF | San Bernardino | 115 min |
| Jul 13, 9:39 PM PDT | Flash Flood Warning | VEF | San Bernardino | 81 min |
| Jul 13, 11:46 PM PDT | Flash Flood Warning | VEF | San Bernardino | 97 min |
| Jul 14, 12:19 AM PDT | Flash Flood Warning | VEF | Inyo | 86 min |
| Jul 14, 1:09 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 35 min |
| Jul 14, 1:19 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 min |
| Jul 14, 1:34 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Jul 14, 1:36 PM PDT | Flash Flood Warning | VEF | San Bernardino | 114 min |
| Jul 14, 1:42 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 21 min |
| Jul 14, 4:22 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 38 min |
| Jul 14, 4:29 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 2 hr |
| Jul 14, 4:33 PM PDT | Flash Flood Warning | VEF | San Bernardino | 117 min |
| Jul 14, 4:38 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 14, 1:28 PM PDT | Flash Flood Warning | VEF | Mohave | 4 hr |
| Jul 14, 2:00 PM PDT | Areal Flood Advisory | VEF | Mohave | 2 hr |
| Jul 14, 3:17 PM PDT | Flash Flood Warning | VEF | Mohave | 118 min |
| Jul 14, 3:27 PM PDT | Flash Flood Warning | VEF | Mohave | 5 hr |
| Jul 14, 4:03 PM PDT | Areal Flood Advisory | VEF | Mohave | 57 min |
| Jul 14, 4:42 PM PDT | Flash Flood Warning | VEF | Mohave | 3 hr |
Nearby
Flash Flood Warnings in California, 2012Flash Flood Warnings in Arizona, 2012Every flash flood warning in 2012
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.