Alert archive / Nevada / Flash Flood Warnings in 2011

Flash Flood Warning 101, NWS Las Vegas, NV

September 16, 2011Lincoln County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Sep 16, 2011, 2:03 PM PDT for Lincoln County, Nevada. It was in force for 2 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: Sep 16, 2011, 2:03 PM PDT (21:03 UTC)
Expired: Sep 16, 2011, 4:14 PM PDT
In force: 2 hr
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Flood severity: None

County Lincoln County, NV

The radar

The Cedar City radar (KICX), 144 km from the middle of the area, began a volume at 21:06 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, 9.1 hours before the alert went out and 203 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: 423 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 1888 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: -4 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

066 
WGUS55 KVEF 162103
FFWVEF
NVC017-170000-
/O.NEW.KVEF.FF.W.0101.110916T2103Z-110917T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
203 PM PDT FRI SEP 16 2011

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL LINCOLN COUNTY IN SOUTH CENTRAL NEVADA...

* UNTIL 500 PM PDT.

* AT 151 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM NEAR PIOCHE. THE STORM
  PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...PIOCHE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES...
AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS
NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR
WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!

REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS.

&&

LAT...LON 3797 11450 3807 11437 3804 11428 3790 11435
      3788 11454

$$

KENNEDY

2 follow-up statements

599 
WGUS75 KVEF 162211
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
311 PM PDT FRI SEP 16 2011

NVC017-170000-
/O.CON.KVEF.FF.W.0101.000000T0000Z-110917T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINCOLN NV-
311 PM PDT FRI SEP 16 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM PDT FOR EAST
CENTRAL LINCOLN COUNTY...

AT 253 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORMS REDEVELOPING OVER THE HIGHLAND RANGE WEST 
OF THE TOWN OF PIOCHE AND MOVING SLOWLY TO THE EAST WHILE PRODUCING  
HEAVY RAIN. WHILE THE CASTLETON AND PRINCE AREAS HAVE LIKELY SEEN A 
GOOD AMOUNT OF RAIN SINCE EARLY THIS AFTERNOON...THE TOWN OF PIOCHE 
AND EAST ALONG EAGLE VALLEY ROAD HAVE RECEIVED THE HEAVIEST 
PRECIPITATION...AND THESE AREAS ARE WHERE THE THREAT OF FLASH 
FLOODING REMAIN THE GREATEST.

LOCATIONS IMPACTED INCLUDE...PIOCHE...CASTLETON...PRINCE...ALONG 
WITH PORTIONS OF HIGHWAY 93 AND EAGLE VALLEY ROAD IN EASTERN 
LINCOLN COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON 
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED 
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!

REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS.

&&

LAT...LON 3797 11450 3807 11437 3804 11428 3790 11435
      3788 11454

$$
KENNEDY

287 
WGUS75 KVEF 162314
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
414 PM PDT FRI SEP 16 2011

NVC017-162321-
/O.CAN.KVEF.FF.W.0101.000000T0000Z-110917T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINCOLN NV-
414 PM PDT FRI SEP 16 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EAST CENTRAL
LINCOLN COUNTY...

ALTHOUGH MODERATE SHOWERS MAY CONTINUE TO IMPACT THE PIOCHE AREA  
THE REMAINDER OF THE AFTERNOON...THE THREAT OF FLASH FLOODING HAS 
DECREASED SIGNIFICANTLY AND THE WARNING WILL BE CANCELLED.

LAT...LON 3797 11450 3807 11437 3804 11428 3790 11435
      3788 11454

$$
KENNEDY

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 15, 5:14 PM PDT	Flash Flood Warning	VEF	Lincoln	2 hr
Sep 15, 5:46 PM PDT	Flash Flood Warning	VEF	Lincoln	119 min
Sep 15, 7:41 PM PDT	Flash Flood Warning	VEF	Lincoln	2 hr
Sep 16, 12:47 PM PDT	Severe Thunderstorm Warning	VEF	Clark	43 min
Sep 16, 1:29 PM PDT	Severe Thunderstorm Warning	VEF	Clark	46 min
Sep 16, 1:58 PM PDT	Flash Flood Warning	VEF	Clark	71 min

Nearby

Flash Flood Warnings in Nevada, 2011 Every flash flood warning in 2011

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.