Alert archive / Nevada / Flash Flood Warnings in 2015

Flash Flood Warning 49, NWS Reno, NV

July 10, 2015Washoe County, Nevada

NWS Reno, NV issued this flash flood warning at Jul 10, 2015, 10:19 PM PDT for Washoe County, Nevada. It was in force for 116 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 10, 2015, 10:19 PM PDT (05:19 UTC)
Expired: Jul 11, 2015, 12:15 AM PDT
In force: 116 min
Issued by: NWS Reno, NV
Area: Storm-based polygon
Flood severity: None

County Washoe County, NV

The radar

The Reno radar (KRGX), 21 km from the middle of the area, began a volume at 05:20 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, 5.3 hours before the alert went out and 124 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: 10 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1752 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 65 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.

118 
WGUS55 KREV 110519
FFWREV
NVC031-110715-
/O.NEW.KREV.FF.W.0049.150711T0519Z-150711T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RENO NV
1019 PM PDT FRI JUL 10 2015

THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL WASHOE COUNTY IN WESTERN NEVADA...

* UNTIL 1215 AM PDT
    
* AT 1015 PM PDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN JUST SOUTH OF SUTCLIFFE. FLASH FLOODING IS OCCURRING OR 
  EXPECTED TO BEGIN SHORTLY. EXCESSIVE RAINFALL OVER THE WARNED AREA 
  WILL CAUSE MUD SLIDES NEAR STEEP TERRAIN. THE MUD SLIDE CAN 
  CONSIST OF ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SUTCLIFFE AND HIGHWAY 445 SOUTH OF SUTCLIFFE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY 
DEEPER THAN THEY APPEAR. THE TERRAIN IS VERY STEEP AND SUSCEPTIBLE 
TO FLASH FLOODS AND DEBRIS FLOWS.


&&

LAT...LON 3994 11955 3988 11956 3989 11963 3994 11961

$$

WH

2 follow-up statements

366 
WGUS75 KREV 110610
FFSREV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
1110 PM PDT FRI JUL 10 2015

NVC031-110715-
/O.CON.KREV.FF.W.0049.000000T0000Z-150711T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHOE NV-
1110 PM PDT FRI JUL 10 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM PDT FOR
CENTRAL WASHOE COUNTY...

AT 1109 PM PDT...DOPPLER RADAR INDICATED THAT HEAVIER RAINFALL HAS 
MOVED NORTH OF SUTCLIFFE.

HOWEVER...EXCESSIVE RAINFALL EARLIER OVER THE WARNED AREA COULD 
STILL CAUSE RUNOFF AND MUD SLIDES IN THE HIGHER TERRAIN SOUTH OF 
SUTCLIFFE...AND COULD STILL AFFECT PORTIONS OF HIGHWAY 445. THE MUD 
SLIDE CAN CONSIST OF ROCK...MUD...VEGETATION AND OTHER LOOSE 
MATERIALS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. A FEW INCHES OF FAST FLOWING WATER IS
POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 3994 11955 3988 11956 3989 11963 3994 11961

$$

SS

791 
WGUS75 KREV 110707
FFSREV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
1207 AM PDT SAT JUL 11 2015

NVC031-110717-
/O.EXP.KREV.FF.W.0049.000000T0000Z-150711T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHOE NV-
1207 AM PDT SAT JUL 11 2015

...THE FLASH FLOOD WARNING FOR CENTRAL WASHOE COUNTY WILL EXPIRE AT
1215 AM PDT...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT.

LAT...LON 3994 11955 3988 11956 3989 11963 3994 11961

$$

SS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 6:19 PM PDT	Areal Flood Advisory	REV	Douglas	3 hr
Jul 10, 8:05 PM PDT	Areal Flood Advisory	REV	Lyon, Storey	3 hr

Nearby

Flash Flood Warnings in Nevada, 2015 Every flash flood warning in 2015

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.