Alert archive / California / Flash Flood Warnings in 2014
Flash Flood Warning 63, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 3, 2014, 4:22 PM 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
- Aug 3, 2014, 4:22 PM PDT (23:22 UTC)
- Expired
- Aug 3, 2014, 7:15 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), 139 km from the middle of the area, began a volume at 23:24 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 3, 6:00 PM PDT | FLASH FLOOD | 6 E Amboy, CA | MUD AND WATER WASHED ACROSS NATIONAL TRAILS HIGHWAY NEAR AMBOY RESULTING IN CREWS HAVING TO BE DISPATCHED TO CLEAR THE ROADS. THE EVENT TIME WAS AN ESTIMATE. |
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, 11.4 hours before the alert went out and 193 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2234 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
947 WGUS55 KVEF 032322 FFWVEF CAC071-040215- /O.NEW.KVEF.FF.W.0063.140803T2322Z-140804T0215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 422 PM PDT SUN AUG 3 2014 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 715 PM PDT * AT 420 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A THUNDERSTORM NEAR AMBOY...OR 25 MILES SOUTH OF MITCHELL CAVERNS. THE STORM PRODUCING FLASH FLOODING WAS NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE... AMBOY INTERSTATE 40 BETWEEN MILE MARKERS 70 AND 83. NATIONAL TRAILS HIGHWAY NEAR AMBOY 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 3474 11580 3474 11560 3451 11558 3451 11580 $$ STACHELSKI
2 follow-up statements
382 WGUS75 KVEF 040037 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 537 PM PDT SUN AUG 3 2014 CAC071-040215- /O.CON.KVEF.FF.W.0063.000000T0000Z-140804T0215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 537 PM PDT SUN AUG 3 2014 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... AT 535 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED AREA. RADAR ESTIMATES OF OVER ONE INCH AN HOUR WERE SHOWN IN THIS AREA. THIS WILL LEAD TO SEVERAL INCHES OF WATER AS WELL AS MUD AND ROCKS CROSSING LOW SPOTS ON AREA ROADS. LOCATIONS IMPACTED INCLUDE... AMBOY AND NATIONAL TRAILS HIGHWAY NEAR AMBOY PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON ROADS. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROAD OR ENTER A FLOOD CHANNEL. TURN AROUND...DONT DROWN! REPORT FLOODING TO THE LAS VEGAS NATIONAL WEATHER SERVICE VIA FACEBOOK OR TWITTER. && LAT...LON 3474 11580 3474 11560 3451 11558 3451 11580 $$ STACHELSKI
205 WGUS75 KVEF 040151 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 651 PM PDT SUN AUG 3 2014 CAC071-040201- /O.CAN.KVEF.FF.W.0063.000000T0000Z-140804T0215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 651 PM PDT SUN AUG 3 2014 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL SAN BERNARDINO COUNTY... RAINFALL HAS JUST ABOUT ENDED IN THE AMBOY AREA. ANY RUNOFF FROM EARLIER SHOULD BE SUBSIDING. BE ALERT AS STANDING WATER OR MUD MAY STILL EXIST IN LOW SPOTS ON AREA ROADS. LAT...LON 3474 11580 3474 11560 3451 11558 3451 11580 $$ STACHELSKI
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 12:55 PM PDT | Flash Flood Warning | VEF | San Bernardino | 6 hr |
| Aug 3, 1:00 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 45 min |
| Aug 3, 1:36 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 39 min |
| Aug 3, 1:45 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 6 hr |
| Aug 3, 4:33 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 42 min |
| Aug 3, 4:39 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 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.