Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 63, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 30, 2012, 11:53 AM 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, 11:53 AM PDT (18:53 UTC)
- Expired
- Jul 30, 2012, 1:45 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), 49 km from the middle of the area, began a volume at 18:55 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, 6.9 hours before the alert went out and 104 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.
755 WGUS55 KVEF 301853 FFWVEF CAC071-302045- /O.NEW.KVEF.FF.W.0063.120730T1853Z-120730T2045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 1153 AM PDT MON JUL 30 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 145 PM PDT. * AT 1146 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM SEVERAL THUNDERSTORMS LOCATED OVER AND WEST OF NIPTON ALONG NIPTON ROAD AND IVANPAH ROADS IN EASTERN SAN BERNARDINO COUNTY. THESE ARE MOVING SLOWLY TO THE SOUTHWEST AT 10 MPH. * LOCATIONS IMPACTED INCLUDE...NIPTON AND NIPTON AND IVANPAH ROADS FROM THE NEVADA STATE LINE TO THE INTERSTATE 15 JUNCTION. 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 3546 11543 3553 11530 3545 11520 3537 11533 $$ KENNEDY
2 follow-up statements
487 WGUS75 KVEF 302012 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 112 PM PDT MON JUL 30 2012 CAC071-302045- /O.CON.KVEF.FF.W.0063.000000T0000Z-120730T2045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 112 PM PDT MON JUL 30 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 145 PM PDT FOR NORTHEASTERN SAN BERNARDINO COUNTY... ALTHOUGH HEAVY RAIN HAS ENDED OVER THE WARNED AREA...ESTIMATED RAINFALL AMOUNTS OVER 1 INCH OCCURRED IN THIS AREA AND RUNOFF WILL LIKELY PRODUCE FLOODING NEAR NIPTON AND ALONG NIPTON AND IVANPAH ROADS FROM THE NEVADA STATE LINE TO THE INTERSTATE 15 JUNCTION. LOCATIONS IMPACTED INCLUDE...NIPTON AND NIPTON AND IVANPAH ROADS FROM THE NEVADA STATE LINE TO THE INTERSTATE 15 JUNCTION. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3546 11543 3553 11530 3545 11520 3537 11533 $$ KENNEDY
669 WGUS75 KVEF 302041 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 141 PM PDT MON JUL 30 2012 CAC071-302048- /O.EXP.KVEF.FF.W.0063.000000T0000Z-120730T2045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 141 PM PDT MON JUL 30 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 145 PM PDT FOR NORTHEASTERN SAN BERNARDINO COUNTY... HEAVY RAINFALL HAS NOT FALLEN NEAR THE NIPTON AREA DURING THE PAST 45 MINUTES...AND THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 145 PM MST. LAT...LON 3546 11543 3553 11530 3545 11520 3537 11533 $$ 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, 12:38 PM 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.