Alert archive / Nevada / Flash Flood Warnings in 2015

Flash Flood Warning 41, NWS Reno, NV

July 8, 2015Washoe County, Nevada

NWS Reno, NV issued this flash flood warning at Jul 8, 2015, 3:19 PM PDT for Washoe 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 8, 2015, 3:19 PM PDT (22:19 UTC)
Expired: Jul 8, 2015, 6:15 PM PDT
In force: 3 hr
Issued by: NWS Reno, NV
Area: Storm-based polygon
Flood severity: None

County Washoe County, NV

The radar

The Reno radar (KRGX), 29 km from the middle of the area, began a volume at 22:22 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 12:00Z, 10.3 hours before the alert went out and 136 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: 6 J/kg
Mixed-layer CIN: -244 J/kg
Mixed-layer LCL: 1248 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 107 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.

522 
WGUS55 KREV 082219
FFWREV
NVC031-090115-
/O.NEW.KREV.FF.W.0041.150708T2219Z-150709T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RENO NV
319 PM PDT WED JUL 8 2015

THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A

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

* UNTIL 615 PM PDT
    
* AT 317 PM PDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS OCCURRING OR 
  EXPECTED TO BEGIN SHORTLY. THESE LOCATIONS HAVE RECEIVED QUITE A 
  BIT OF RAIN OVER THE LAST FEW DAYS AND ARE VERY SUSCEPTIBLE TO 
  FLOODING.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  RENO...SPARKS...WINGFIELD SPRINGS...SPANISH SPRINGS...GOLDEN
  VALLEY...LEMMON VALLEY-GOLDEN VALLEY...LEMMON VALLEY...STEAD...
  VERDI-MOGUL...STEAD AIRPORT...SUN VALLEY...NWS RENO AND SPANISH
  SPRINGS AIRPORT.

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.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES.  ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 3975 11967 3953 11968 3956 11997 3977 11995

$$

MB

1 follow-up statement

083 
WGUS75 KREV 082328
FFSREV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
428 PM PDT WED JUL 8 2015

NVC031-082337-
/O.CAN.KREV.FF.W.0041.000000T0000Z-150709T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHOE NV-
428 PM PDT WED JUL 8 2015

...THE FLASH FLOOD WARNING FOR SOUTHERN WASHOE COUNTY IS CANCELLED...

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

LAT...LON 3975 11967 3953 11968 3956 11997 3977 11995

$$

AH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 5:34 PM PDT	Special Weather Statement	REV		41 min
Jul 7, 10:04 PM PDT	Flash Flood Watch	REV	Churchill, Douglas, Lyon, Mineral, Pershing, Storey and 1 more	23 hr
Jul 8, 12:12 PM PDT	Special Weather Statement	REV	Churchill	48 min
Jul 8, 12:41 PM PDT	Severe Thunderstorm Warning	REV	Douglas	49 min
Jul 8, 1:18 PM PDT	Special Weather Statement	REV	Lander	42 min
Jul 8, 1:25 PM PDT	Special Weather Statement	REV	Douglas	35 min
Jul 8, 1:37 PM PDT	Flash Flood Warning	REV	Douglas, Washoe	3 hr
Jul 8, 1:37 PM PDT	Special Weather Statement	REV		38 min
Jul 8, 2:05 PM PDT	Special Weather Statement	REV	Storey	40 min
Jul 8, 2:26 PM PDT	Special Weather Statement	REV	Pershing	64 min
Jul 8, 2:30 PM PDT	Special Weather Statement	REV	Lyon	45 min
Jul 8, 2:32 PM PDT	Severe Thunderstorm Warning	REV	Storey, Washoe	43 min
Jul 8, 2:47 PM PDT	Flash Flood Warning	REV	Pershing	3 hr
Jul 8, 3:01 PM PDT	Special Weather Statement	REV	Lyon	44 min
Jul 8, 3:06 PM PDT	Severe Thunderstorm Warning	REV	Storey, Washoe	39 min
Jul 8, 3:19 PM PDT	Flash Flood Warning	REV	Lyon, Mineral	3 hr
Jul 8, 3:26 PM PDT	Special Weather Statement	REV	Mineral	34 min
Jul 8, 3:32 PM PDT	Special Weather Statement	REV	Lyon	43 min
Jul 8, 3:54 PM PDT	Special Weather Statement	REV		36 min
Jul 8, 4:10 PM PDT	Severe Thunderstorm Warning	REV	Churchill	35 min

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.