Alert archive / California / Flash Flood Warnings in 2018

Flash Flood Warning 142, NWS Las Vegas, NV

October 3, 2018Inyo County, San Bernardino County, California

NWS Las Vegas, NV issued this flash flood warning at Oct 3, 2018, 5:46 PM PDT for Inyo County, San Bernardino County, California. It was in force for 119 min. 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: Oct 3, 2018, 5:46 PM PDT (00:46 UTC)
Expired: Oct 3, 2018, 7:45 PM PDT
In force: 119 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Flood severity: None

Counties Inyo County, CA, San Bernardino County, CA

The radar

The Las Vegas radar (KESX), 113 km from the middle of the area, began a volume at 00:46 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
Oct 3, 5:54 PM PDT	FLASH FLOOD	12 Nnw Baker, CA	LAW ENFORCEMENT REPORTED A ROAD CLOSURE OF STATE ROUTE 127 AT MILE MARKER 13 FROM MUD AND DEBRIS ALONG THE ROAD WAY DUE TO FLOODING. LANES WERE REOPENED AT 1858.

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 00:00Z, 0.8 hours before the alert went out and 103 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 65 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 2880 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: -13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

456 
WGUS55 KVEF 040046
FFWVEF
CAC027-071-040245-
/O.NEW.KVEF.FF.W.0142.181004T0046Z-181004T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
546 PM PDT WED OCT 3 2018

The National Weather Service in Las Vegas has issued a

* Flash Flood Warning for...
  North central San Bernardino County in southern California...
  Southern Inyo County in south central California...

* Until 745 PM PDT.

* At 545 PM PDT, Local law enforcement reporting flash flooding 
  across State Route 127 at Mile Marker 20 north.

* Some locations that will experience flooding include...
  Baker, Sr 127 Near Dumont Dunes, Dumont Dunes and Tecopa. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3581 11598 3545 11577 3522 11618 3541 11639
      3581 11650

$$

Boothe

2 follow-up statements

824 
WGUS75 KVEF 040139
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
639 PM PDT WED OCT 3 2018

CAC027-071-040245-
/O.CON.KVEF.FF.W.0142.000000T0000Z-181004T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-Inyo CA-
639 PM PDT WED OCT 3 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM PDT FOR
NORTH CENTRAL SAN BERNARDINO AND SOUTHERN INYO COUNTIES...

At 637 PM PDT, local law enforcement reported flooding over State 
Route 127 at mile marker 20 North.

Some locations that will experience flooding include...
Baker, Sr 127 Near Dumont Dunes, Dumont Dunes and Tecopa. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3581 11598 3545 11577 3522 11618 3541 11639
      3581 11650

$$

Boothe

957 
WGUS75 KVEF 040237
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
737 PM PDT WED OCT 3 2018

CAC027-071-040245-
/O.EXP.KVEF.FF.W.0142.000000T0000Z-181004T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-Inyo CA-
737 PM PDT WED OCT 3 2018

...THE FLASH FLOOD WARNING FOR NORTH CENTRAL SAN BERNARDINO AND
SOUTHERN INYO COUNTIES WILL EXPIRE AT 745 PM PDT...

Flood waters have receded. Flooding is no longer expected to pose a 
threat. Please continue to heed any remaining road closures.

LAT...LON 3581 11598 3545 11577 3522 11618 3541 11639
      3581 11650

$$

Boothe

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 3, 6:06 PM PDT	Areal Flood Advisory	VEF	San Bernardino	3 hr
Oct 3, 6:18 PM PDT	Severe Thunderstorm Warning	VEF	Inyo, San Bernardino	42 min
Oct 3, 7:54 PM PDT	Areal Flood Advisory	VEF	San Bernardino	2 hr
Oct 3, 8:18 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	24 min
Oct 3, 8:55 PM PDT	Flash Flood Warning	VEF	San Bernardino	5 hr
Oct 3, 9:30 PM PDT	Flash Flood Warning	VEF	San Bernardino	5 hr
Oct 3, 9:54 PM PDT	Flash Flood Warning	VEF	San Bernardino	2 hr
Oct 3, 10:16 PM PDT	Areal Flood Advisory	VEF	San Bernardino	2 hr
Oct 3, 10:20 PM PDT	Areal Flood Advisory	VEF	Inyo	79 min
Oct 3, 10:47 PM PDT	Flash Flood Warning	VEF	San Bernardino	3 hr
Oct 4, 12:11 AM PDT	Flash Flood Warning	VEF	San Bernardino	3 hr

Nearby

Flash Flood Warnings in California, 2018 Every flash flood warning in 2018

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.