Alert archive / California / Flash Flood Warnings in 2016

Flash Flood Warning 24, NWS Las Vegas, NV

July 1, 2016San Bernardino County, California

NWS Las Vegas, NV issued this flash flood warning at Jul 1, 2016, 1:41 AM PDT for San Bernardino County, California. It was in force for 3 hr. 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 1, 2016, 1:41 AM PDT (08:41 UTC)
Expired
Jul 1, 2016, 4:45 AM 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), 87 km from the middle of the area, began a volume at 08:44 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

Yuma Prvg Ground, AZ (K1Y7), launched 00:00Z, 8.7 hours before the alert went out and 278 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.

Skew-T log-pSkew-T log-p diagram, Yuma Prvg Ground, AZ at 00:00Z on 2016-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 423 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Yuma Prvg Ground, AZ at 00:00Z on 2016-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.1939Sfc1 km3 km6 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
423 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
2290 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
121 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

089 
WGUS55 KVEF 010841
FFWVEF
CAC071-011145-
/O.NEW.KVEF.FF.W.0024.160701T0841Z-160701T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
141 AM PDT FRI JUL 1 2016

THE NATIONAL WEATHER SERVICE IN LAS VEGAS  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...

* UNTIL 445 AM PDT

* AT 139 AM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA NEAR GOFFS ROAD. FLASH FLOODING
  IS EXPECTED TO BEGIN SHORTLY.

* FLASH FLOODING WILL REMAIN OVER MAINLY RURAL AREAS OF EAST CENTRAL
  SAN BERNARDINO COUNTY INCLUDING GOFFS ROAD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3482 11522 3505 11517 3511 11499 3489 11480

$$

JH
2 follow-up statements
267 
WGUS75 KVEF 010948
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
248 AM PDT FRI JUL 1 2016

CAC071-011145-
/O.CON.KVEF.FF.W.0024.000000T0000Z-160701T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
248 AM PDT FRI JUL 1 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 AM PDT FOR
EAST CENTRAL SAN BERNARDINO COUNTY...

AT 247 AM PDT...DOPPLER RADAR INDICATED THAT RAIN HAD ENDED IN THE
GOFFS ROAD AREA. HOWEVER, RUNOFF FROM EARLIER STORMS MAY STILL BE
OCCURRING, SO THE FLASH FLOOD WARNING REMAINS IN EFFECT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3482 11522 3505 11517 3511 11499 3489 11480

$$

MORGAN
850 
WGUS75 KVEF 011038
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
338 AM PDT FRI JUL 1 2016

CAC071-011047-
/O.CAN.KVEF.FF.W.0024.000000T0000Z-160701T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
338 AM PDT FRI JUL 1 2016

...THE FLASH FLOOD WARNING FOR EAST CENTRAL SAN BERNARDINO COUNTY IS
CANCELLED...

ALTHOUGH RAIN HAD ENDED IN THE GOFFS ROAD AREA, A LINE OF
THUNDERSTORMS WITH VERY HEAVY RAIN WAS APPROACHING FROM THE
NORTHWEST. THE ORIGINAL FLASH FLOOD WARNING HAS BEEN CANCELLED AND
REPLACED WITH ANOTHER, LARGER WARNING, VALID UNTIL 630 AM PDT.

LAT...LON 3482 11522 3505 11517 3511 11499 3489 11480

$$

MORGAN

The office that day

Everything else NWS Las Vegas, NV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 30, 5:48 PM PDTSevere Thunderstorm WarningVEFSan Bernardino42 min
Jun 30, 5:54 PM PDTFlash Flood WarningVEFSan Bernardino6 hr
Jun 30, 6:26 PM PDTSevere Thunderstorm WarningVEFSan Bernardino34 min
Jun 30, 6:59 PM PDTSevere Thunderstorm WarningVEFSan Bernardino31 min
Jun 30, 10:32 PM PDTFlash Flood WarningVEFInyo3 hr
Jun 30, 10:56 PM PDTSevere Thunderstorm WarningVEFInyo64 min
Jun 30, 11:08 PM PDTFlash Flood WarningVEFInyo4 hr
Jun 30, 11:49 PM PDTFlash Flood WarningVEFInyo3 hr
Jul 1, 2:06 AM PDTFlash Flood WarningVEFSan Bernardino3 hr
Jul 1, 3:36 AM PDTFlash Flood WarningVEFSan Bernardino3 hr
Jul 1, 3:12 PM PDTSevere Thunderstorm WarningVEFSan Bernardino63 min
Jul 1, 3:25 PM PDTAreal Flood AdvisoryVEFSan Bernardino3 hr
Jul 1, 4:05 PM PDTSevere Thunderstorm WarningVEFSan Bernardino55 min
Jul 1, 4:24 PM PDTFlash Flood WarningVEFSan Bernardino3 hr
Jul 1, 4:59 PM PDTSevere Thunderstorm WarningVEFSan Bernardino61 min

Nearby

Flash Flood Warnings in California, 2016Every flash flood warning in 2016

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.