Alert archive / Nevada / Flash Flood Warnings in 2016

Flash Flood Warning 12, NWS Las Vegas, NV

June 30, 2016Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Jun 30, 2016, 1:10 PM PDT for Clark County, Nevada. 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: Jun 30, 2016, 1:10 PM PDT (20:10 UTC)
Expired: Jun 30, 2016, 4:15 PM PDT
In force: 3 hr
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Flood severity: None

County Clark County, NV

The radar

The Las Vegas radar (KESX), 113 km from the middle of the area, began a volume at 20:12 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, 8.2 hours before the alert went out and 70 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: 487 J/kg
Mixed-layer CIN: -306 J/kg
Mixed-layer LCL: 2632 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

998 
WGUS55 KVEF 302010
FFWVEF
NVC003-302315-
/O.NEW.KVEF.FF.W.0012.160630T2010Z-160630T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
110 PM PDT THU JUN 30 2016

THE NATIONAL WEATHER SERVICE IN LAS VEGAS  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL CLARK COUNTY IN SOUTHERN NEVADA...

* UNTIL 415 PM PDT

* AT 109 PM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE EASTERN SLOPES OF THE SHEEP RANGE. UP TO TWO
  INCHES OF RAIN HAVE ALREADY FALLEN IN SOME BASINS AND FLASH
  FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SR 168 MILE MARKER 21...COYOTE SPRINGS AND HAYFORD PK. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING
SPOTS.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED
ROADS. FIND AN ALTERNATE ROUTE.

&&

LAT...LON 3651 11478 3651 11520 3685 11526 3686 11495
      3685 11476 3684 11476 3684 11461

$$

OUTLER

2 follow-up statements

879 
WGUS75 KVEF 302204
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
304 PM PDT THU JUN 30 2016

NVC003-302315-
/O.CON.KVEF.FF.W.0012.000000T0000Z-160630T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
304 PM PDT THU JUN 30 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM PDT FOR
NORTH CENTRAL CLARK COUNTY...

AT 303 PM PDT...HEAVY RAIN CONTINUES BETWEEN APEX AND COYOTE
SPRINGS. UP TO TWO INCHES OF RAIN HAVE ALREADY FALLEN IN SOME AREAS.
FLASH FLOODING WILL CONTINUE IN AREA WASHES AND DRAINAGES THROUGH
THE LATE AFTERNOON. 

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SR 168 MILE MARKER 21...COYOTE SPRINGS AND HAYFORD PK. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING
SPOTS.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED
ROADS. FIND AN ALTERNATE ROUTE.

&&

LAT...LON 3651 11478 3651 11520 3685 11526 3686 11495
      3685 11476 3684 11476 3684 11461

$$

OUTLER

384 
WGUS75 KVEF 302306
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
406 PM PDT THU JUN 30 2016

NVC003-302315-
/O.EXP.KVEF.FF.W.0012.000000T0000Z-160630T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
406 PM PDT THU JUN 30 2016

...THE FLASH FLOOD WARNING FOR NORTH CENTRAL CLARK COUNTY WILL EXPIRE
AT 415 PM PDT...

THE HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE A
THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 3651 11478 3651 11520 3685 11526 3686 11495
      3685 11476 3684 11476 3684 11461

$$

OUTLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 5:04 PM PDT	Areal Flood Advisory	VEF	Esmeralda	3 hr
Jun 30, 12:35 PM PDT	Flash Flood Warning	VEF	Clark	3 hr
Jun 30, 12:52 PM PDT	Severe Thunderstorm Warning	VEF	Clark	38 min
Jun 30, 12:59 PM PDT	Flash Flood Warning	VEF	Clark	3 hr
Jun 30, 1:32 PM PDT	Severe Thunderstorm Warning	VEF	Clark	43 min
Jun 30, 2:04 PM PDT	Flash Flood Warning	VEF	Lincoln, Nye	3 hr
Jun 30, 2:26 PM PDT	Flash Flood Warning	VEF	Clark	3 hr
Jun 30, 2:30 PM PDT	Severe Thunderstorm Warning	VEF	Clark	60 min
Jun 30, 2:42 PM PDT	Severe Thunderstorm Warning	VEF	Clark	63 min
Jun 30, 2:47 PM PDT	Severe Thunderstorm Warning	VEF	Clark	88 min
Jun 30, 2:49 PM PDT	Areal Flood Advisory	VEF	Lincoln	26 min
Jun 30, 2:55 PM PDT	Flash Flood Warning	VEF	Lincoln	3 hr
Jun 30, 3:11 PM PDT	Areal Flood Advisory	VEF	Lincoln	3 hr
Jun 30, 3:51 PM PDT	Flash Flood Warning	VEF	Clark	3 hr
Jun 30, 4:13 PM PDT	Severe Thunderstorm Warning	VEF	Clark	69 min
Jun 30, 4:52 PM PDT	Severe Thunderstorm Warning	VEF	Clark	68 min

Nearby

Flash Flood Warnings in Nevada, 2016 Every 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.