Alert archive / Nevada / Flash Flood Warnings in 2018

Flash Flood Warning 39, NWS Las Vegas, NV

July 12, 2018Lincoln County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Jul 12, 2018, 3:00 PM PDT for Lincoln County, Nevada. It was in force for 72 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 12, 2018, 3:00 PM PDT (22:00 UTC)
Expired
Jul 12, 2018, 4:12 PM PDT
In force
72 min
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Flood severity
None

County Lincoln County, NV

The radar

The Cedar City radar (KICX), 145 km from the middle of the area, began a volume at 21:59 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, 10.0 hours before the alert went out and 131 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, Las Vegas, NV at 12:00Z on 2018-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 627 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Las Vegas, NV at 12:00Z on 2018-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -15 square meters per square second.1939Sfc1 km3 km6 km9 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
627 J/kg
Mixed-layer CIN
-87 J/kg
Mixed-layer LCL
1700 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-15 m²/s²
0-3 km storm-relative helicity
48 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

765 
WGUS55 KVEF 122200
FFWVEF
NVC017-130100-
/O.NEW.KVEF.FF.W.0039.180712T2200Z-180713T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
300 PM PDT THU JUL 12 2018

The National Weather Service in Las Vegas has issued a

* Flash Flood Warning for...
  Southeastern Lincoln County in south central Nevada...

* Until 600 PM PDT.

* At 259 PM PDT, Doppler radar indicated thunderstorms producing 
  heavy rain near Carp. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Carp.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

&&

LAT...LON 3724 11426 3696 11426 3696 11461 3724 11461

$$

Morgan
2 follow-up statements
158 
WGUS75 KVEF 122257
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
357 PM PDT THU JUL 12 2018

NVC017-130100-
/O.CON.KVEF.FF.W.0039.000000T0000Z-180713T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lincoln NV-
357 PM PDT THU JUL 12 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM PDT FOR
SOUTHEASTERN LINCOLN COUNTY...

At 356 PM PDT, Doppler radar indicated that thunderstorms over Carp 
had dissipated. However, very heavy rain had fallen in the area, and 
flash flooding is likely ongoing.

Some locations that will experience flooding include...
Carp.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

&&

LAT...LON 3724 11426 3696 11426 3696 11461 3724 11461

$$

Morgan
210 
WGUS75 KVEF 122312 RRA
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
412 PM PDT THU JUL 12 2018

NVC017-122322-
/O.CAN.KVEF.FF.W.0039.000000T0000Z-180713T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lincoln NV-
412 PM PDT THU JUL 12 2018

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN LINCOLN COUNTY IS
CANCELLED...

This warning has been replaced by a Flash Flood Warning for much of 
central Lincoln County, valid until 715 PM PDT.

LAT...LON 3724 11426 3696 11426 3696 11461 3724 11461

$$

Morgan

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 2:51 AM PDTFlash Flood WatchVEFClark, Esmeralda, Lincoln, Nye21 hr
Jul 12, 11:20 AM PDTFlash Flood WarningVEFNye113 min
Jul 12, 11:28 AM PDTFlash Flood WarningVEFClark77 min
Jul 12, 11:59 AM PDTFlash Flood WarningVEFClark3 hr
Jul 12, 12:19 PM PDTAreal Flood AdvisoryVEFClark2 hr
Jul 12, 12:43 PM PDTFlash Flood WarningVEFClark2 hr
Jul 12, 1:12 PM PDTFlash Flood WarningVEFLincoln, Nye3 hr
Jul 12, 1:33 PM PDTFlash Flood WarningVEFLincoln105 min
Jul 12, 2:22 PM PDTFlash Flood WarningVEFLincoln110 min
Jul 12, 2:33 PM PDTFlash Flood WarningVEFClark81 min
Jul 12, 2:46 PM PDTAreal Flood AdvisoryVEFClark81 min
Jul 12, 2:54 PM PDTFlash Flood WarningVEFEsmeralda3 hr
Jul 12, 3:42 PM PDTAreal Flood AdvisoryVEFClark52 min
Jul 12, 4:10 PM PDTFlash Flood WarningVEFLincoln3 hr

Nearby

Flash Flood Warnings in Nevada, 2018Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.