Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 64, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 30, 2012, 12:38 PM PDT for San Bernardino County, California. It was in force for 112 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 30, 2012, 12:38 PM PDT (19:38 UTC)
- Expired
- Jul 30, 2012, 2:30 PM PDT
- In force
- 112 min
- 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), 78 km from the middle of the area, began a volume at 19:38 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.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 7.6 hours before the alert went out and 129 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
- 2888 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
113 WGUS55 KVEF 301938 FFWVEF CAC071-302130- /O.NEW.KVEF.FF.W.0064.120730T1938Z-120730T2130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 1238 PM PDT MON JUL 30 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 230 PM PDT. * AT 1232 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR CIMA. THE STORM PRODUCING VERY HEAVY RAIN WAS MOVING WEST AT 10 MPH.. * LOCATIONS IMPACTED INCLUDE...CIMA AND SOUTH ALONG KELSO CIMA ROAD TO THE MACEDONIA CANYON ROAD TURNOFF. A LOW WATER CROSSING JUST SOUTH OF CIMA IS VERY SUSCEPTIBLE TO FLOODING...AND IS LIKELY TO BE IMPACTED BY THIS STORM EVEN AS IT MOVES WEST AS RUNOFF TYPICALLY DRAINS TO THIS AREA. 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 3527 11558 3522 11542 3517 11543 3516 11554 $$ KENNEDY
2 follow-up statements
533 WGUS75 KVEF 302006 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 106 PM PDT MON JUL 30 2012 CAC071-302130- /O.CON.KVEF.FF.W.0064.000000T0000Z-120730T2130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 106 PM PDT MON JUL 30 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... AT 100 PM PDT...THUNDERSTORMS HAVE DIMINISHED OVER THE WARNED AREA AND CONTINUE TO MOVE SLOWLY TO THE SOUTHEAST...HOWEVER...RADAR ESTIMATES INDICATE A SIGNIFICANT AMOUNT OF PRECIPITATION OCCURRED OVER A BASIN WHICH DRAINS TO A KNOWN LOW WATER CROSSING LONG KELSO CIMA ROAD JUST SOUTH OF CIMA...AND FLASH FLOODING IS LIKELY STILL OCCURRING. LOCATIONS IMPACTED INCLUDE...CIMA AND SOUTH ALONG KELSO CIMA ROAD TO THE MACEDONIA CANYON ROAD TURNOFF. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3527 11558 3522 11542 3517 11543 3516 11554 $$ KENNEDY
811 WGUS75 KVEF 302126 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 226 PM PDT MON JUL 30 2012 CAC071-302131- /O.EXP.KVEF.FF.W.0064.000000T0000Z-120730T2130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.IO/ SAN BERNARDINO CA- 226 PM PDT MON JUL 30 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 230 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... HEAVY RAINFALL HAS NOT FALLEN OVER THE WARNED AREA AND JUST WEST OF CIMA DURING THE PAST 50 MINUTES...AND ANY FLOOD WATERS IMPACTING CIMA ROAD AND KELSO CIMA ROAD SOUTH DOWN TO ELORA SHOULD BE RECEDING. THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 230 PM PDT. LAT...LON 3527 11558 3522 11542 3517 11543 3516 11554 $$ KENNEDY
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 9:00 PM PDT | Flash Flood Watch | VEF | San Bernardino | 25 hr |
| Jul 30, 11:53 AM PDT | Flash Flood Warning | VEF | San Bernardino | 112 min |
| Jul 30, 1:24 PM PDT | Flash Flood Warning | VEF | San Bernardino | 111 min |
Nearby
Flash Flood Warnings in California, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.