Alert archive / Nevada / Flash Flood Warnings in 2011

Flash Flood Warning 10, NWS Elko, NV

July 31, 2011Eureka County, Lander County, Nevada

NWS Elko, NV issued this flash flood warning at Jul 31, 2011, 5:01 PM PDT for Eureka County, Lander 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: Jul 31, 2011, 5:01 PM PDT (00:01 UTC)
Expired: Jul 31, 2011, 8:07 PM PDT
In force: 3 hr
Issued by: NWS Elko, NV
Area: Storm-based polygon
Flood severity: None

Counties Eureka County, NV, Lander County, NV

The radar

The Elko radar (KLRX), 163 km from the middle of the area, began a volume at 00:04 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

Reno, NV (KREV), launched 00:00Z, 0.0 hours before the alert went out and 135 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: 34 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 2526 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

428 
WGUS55 KLKN 010001
FFWLKN
NVC011-015-010600-
/O.NEW.KLKN.FF.W.0010.110801T0001Z-110801T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ELKO NV
501 PM PDT SUN JUL 31 2011

THE NATIONAL WEATHER SERVICE IN ELKO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EXTREME SOUTHWESTERN EUREKA COUNTY IN NORTH CENTRAL NEVADA...
  SOUTHEASTERN LANDER COUNTY IN NORTH CENTRAL NEVADA...

* UNTIL 1100 PM PDT

* AT 410 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  FLASH FLOODING MAY BE OCCURRING IN THE WARNED AREA. RADAR          
  ESTIMATES INDICATE OVER 1.5 INCHES OF RAIN MAY HAVE FALLEN IN THE  
  LAST 3 HOURS.

LOCATIONS NEAR THE PATH OF INCLUDE...THE MONITOR VALLEY AND MONITOR 
RANGE IN SOUTHEASTERN LANDER COUNTY AND EXTREME SOUTHWESTERN EUREKA 
COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.

&&

LAT...LON 3935 11677 3935 11654 3917 11654 3917 11677

$$

RCM

1 follow-up statement

153 
WGUS75 KLKN 010307
FFSLKN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ELKO NV
807 PM PDT SUN JUL 31 2011

NVC011-015-010311-
/O.CAN.KLKN.FF.W.0010.000000T0000Z-110801T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
EUREKA NV-LANDER NV-
807 PM PDT SUN JUL 31 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN 
LANDER AND EXTREME SOUTHWESTERN EUREKA COUNTIES...

SHOWERS AND THUNDERSTORMS HAVE DECREASED OVER EXTREME SOUTHEASTERN 
LANDER COUNTY AND SOUTHWESTERN EUREKA COUNTY. THEREFORE THE FLASH 
FLOOD WARNING IS CANCELLED. HOWEVER...SHOWERS AND THUNDERSTORMS WILL 
CONTINUE THIS EVENING FOR BRIEF HEAVY RAIN SHOWERS WITH POSSIBLE 
LOCALIZED FLOODING.
&&

LAT...LON 3935 11677 3935 11654 3917 11654 3917 11677

$$

JH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 5:05 PM PDT	Flash Flood Warning	LKN	Humboldt	2 hr
Jul 31, 5:24 PM PDT	Flash Flood Warning	LKN	Humboldt	3 hr
Jul 31, 6:17 PM PDT	Special Weather Statement	LKN		28 min
Jul 31, 6:33 PM PDT	Special Weather Statement	LKN		42 min
Jul 31, 6:35 PM PDT	Special Weather Statement	LKN		25 min
Jul 31, 6:44 PM PDT	Special Weather Statement	LKN		46 min
Jul 31, 6:53 PM PDT	Special Weather Statement	LKN		52 min
Jul 31, 7:08 PM PDT	Special Weather Statement	LKN		37 min
Jul 31, 7:28 PM PDT	Special Weather Statement	LKN		47 min
Jul 31, 8:16 PM PDT	Special Weather Statement	LKN		44 min
Jul 31, 8:32 PM PDT	Special Weather Statement	LKN	Elko	43 min
Jul 31, 8:34 PM PDT	Special Weather Statement	LKN	Elko	41 min
Jul 31, 8:56 PM PDT	Special Weather Statement	LKN		49 min
Aug 1, 2:35 PM PDT	Fire Weather Watch	LKN		5 hr

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.