Alert archive / California / Flash Flood Warnings in 2014
Flash Flood Warning 151, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Sep 8, 2014, 9:04 AM PDT for San Bernardino County, California. It was in force for 3 hr. 1 report 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
- Sep 8, 2014, 9:04 AM PDT (16:04 UTC)
- Expired
- Sep 8, 2014, 12:00 PM PDT
- In force
- 3 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
The radar
The Las Vegas radar (KESX), 113 km from the middle of the area, began a volume at 16:06 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 |
|---|---|---|---|
| Sep 8, 11:30 AM PDT | FLASH FLOOD | 4 Sw Essex, CA | TRAINED SPOTTER REPORTED A BRIDGE WASHED OUT IN THE AREA OF A WASH ALONG RT. 66, ALONG WITH MUD ACROSS THE ROADS THROUGHOUT THE AREA IN AND AROUND ESSEX. |
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 12:00Z, 4.1 hours before the alert went out and 182 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
- 162 J/kg
- Mixed-layer CIN
- -138 J/kg
- Mixed-layer LCL
- 1247 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 93 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
982 WGUS55 KVEF 081604 FFWVEF CAC071-081900- /O.NEW.KVEF.FF.W.0151.140908T1604Z-140908T1900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 904 AM PDT MON SEP 8 2014 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL NOON PDT * AT 900 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM THUNDERSTORMS NEAR ESSEX...OR 25 MILES SOUTHEAST OF MITCHELL CAVERNS. THIS AREA OF THUNDERSTORM ACTIVITY HAS PRODUCED OVER A HALF OF AN INCH OF RAIN ESPECIALLY SOUTH OF ESSEX. RUNOFF INTO WASHES WILL FLOW TOWARD NATIONAL TRAILS HIGHWAY RESULTING IN FLASH FLOODING AND DEBRIS WASHING ONTO THE ROADS. OTHER ROADS IN THE AREA WILL ALSO BE AT RISK TO FLOOD. * LOCATIONS IMPACTED INCLUDE... ESSEX NATIONAL TRAILS HIGHWAY INTERSTATE 40 BETWEEN MILE MARKERS 84 AND 125. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON ROADS. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROAD OR ENTER A FLOOD CHANNEL. TURN AROUND...DONT DROWN! REPORT FLOODING TO THE LAS VEGAS NATIONAL WEATHER SERVICE VIA FACEBOOK OR TWITTER. && LAT...LON 3476 11561 3507 11490 3473 11487 3441 11560 $$ STACHELSKI
2 follow-up statements
409 WGUS75 KVEF 081756 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1056 AM PDT MON SEP 8 2014 CAC071-081900- /O.CON.KVEF.FF.W.0151.000000T0000Z-140908T1900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 1056 AM PDT MON SEP 8 2014 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL NOON PDT FOR EAST CENTRAL SAN BERNARDINO COUNTY... AT 1050 AM PDT...RADAR INDICATED THAT THUNDERSTORMS HAD GENERALLY DECREASED IN INTENSITY IN THE ESSEX AREA. HOWEVER...RUNOFF FROM HEAVY RAIN THAT FELL EARLIER WILL STILL RESULT IN WATER FLOWING ACROSS LOW LYING SPOTS ON ROADS AS WELL AS WATER COLLECTING IN POOR DRAINAGE AREAS. LOCATIONS IMPACTED INCLUDE... ESSEX NATIONAL TRAILS HIGHWAY INTERSTATE 40 BETWEEN MILE MARKERS 84 AND 125. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON ROADS. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROAD OR ENTER A FLOOD CHANNEL. TURN AROUND...DONT DROWN! REPORT FLOODING TO THE LAS VEGAS NATIONAL WEATHER SERVICE VIA FACEBOOK OR TWITTER. && LAT...LON 3476 11561 3507 11490 3473 11487 3441 11560 $$ STACHELSKI
005 WGUS75 KVEF 081857 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1157 AM PDT MON SEP 8 2014 CAC071-081907- /O.EXP.KVEF.FF.W.0151.000000T0000Z-140908T1900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 1157 AM PDT MON SEP 8 2014 ...THE FLASH FLOOD WARNING WILL EXPIRE AT NOON PDT FOR EAST CENTRAL SAN BERNARDINO COUNTY... THUNDERSTORMS IN THE ESSEX AREA HAVE ENDED. ANY RUNOFF FROM HEAVIER THAT RAIN THAT FELL EARLIER SHOULD BE DECREASING. THEREFORE THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE. LAT...LON 3476 11561 3507 11490 3473 11487 3441 11560 $$ STACHELSKI
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 5:34 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Sep 8, 5:28 AM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Sep 8, 8:53 AM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Sep 8, 9:37 AM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Sep 8, 11:33 AM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Sep 8, 11:45 AM PDT | Areal Flood Advisory | VEF | Inyo, San Bernardino | 3 hr |
| Sep 8, 1:20 PM PDT | Flash Flood Warning | VEF | Inyo, San Bernardino | 3 hr |
| Sep 8, 1:53 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Sep 8, 1:58 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Sep 8, 2:18 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Sep 8, 3:18 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Sep 8, 3:21 PM PDT | Flash Flood Warning | VEF | San Bernardino | 5 hr |
Nearby
Flash Flood Warnings in California, 2014Every flash flood warning in 2014
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.