Alert archive / Nevada / Flash Flood Warnings in 2018

Flash Flood Warning 33, NWS Las Vegas, NV

July 12, 2018Lincoln County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Jul 12, 2018, 1:33 PM PDT for Lincoln County, Nevada. It was in force for 105 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, 1:33 PM PDT (20:33 UTC)
Expired
Jul 12, 2018, 3:18 PM PDT
In force
105 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), 124 km from the middle of the area, began a volume at 20:33 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, 8.6 hours before the alert went out and 217 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°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.

257 
WGUS55 KVEF 122033
FFWVEF
NVC017-122330-
/O.NEW.KVEF.FF.W.0033.180712T2033Z-180712T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Las Vegas has issued a

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

* Until 430 PM PDT.

* At 133 PM PDT, Doppler radar indicated thunderstorms producing 
  heavy rain over Ursine. Flash flooding is expected to begin 
  shortly.

* Some locations that will experience flooding include...
  Ursine, Ranch Campground, Meadow Valley Campground, Horsethief
  Gulch Campground, Eagle Valley and Echo Canyon State Park.

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 3809 11406 3784 11406 3786 11435 3810 11433

$$

Morgan
2 follow-up statements
899 
WGUS75 KVEF 122126
FFSVEF

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

NVC017-122330-
/O.CON.KVEF.FF.W.0033.000000T0000Z-180712T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lincoln NV-
226 PM PDT THU JUL 12 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM PDT FOR
NORTHEASTERN LINCOLN COUNTY...

At 225 PM PDT, Doppler radar indicated heavy rain moving south away 
from Ursine. Very heavy rain fell in the Ursine area, and flash 
flooding may be ongoing.

Some locations that will experience flooding include...
Ursine, Ranch Campground, Meadow Valley Campground, Horse Thief 
Gulch Campground, Eagle Valley and Echo Canyon State Park.

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 3809 11406 3784 11406 3786 11435 3810 11433

$$

Morgan
032 
WGUS75 KVEF 122218
FFSVEF

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

NVC017-122228-
/O.CAN.KVEF.FF.W.0033.000000T0000Z-180712T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lincoln NV-
318 PM PDT THU JUL 12 2018

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

The heavy rain has moved well south of Ursine, and flooding is no 
longer expected to pose a threat there. Please continue to heed any 
remaining road closures.

LAT...LON 3809 11406 3784 11406 3786 11435 3810 11433

$$

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, 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, 3:00 PM PDTFlash Flood WarningVEFLincoln72 min
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.