Alert archive / Nevada / Flash Flood Warnings in 2014

Flash Flood Warning 21, NWS Reno, NV

August 6, 2014Mineral County, Nevada

NWS Reno, NV issued this flash flood warning at Aug 6, 2014, 6:56 PM PDT for Mineral 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: Aug 6, 2014, 6:56 PM PDT (01:56 UTC)
Expired: Aug 6, 2014, 9:00 PM PDT
In force: 2 hr
Issued by: NWS Reno, NV
Area: Storm-based polygon
Flood severity: None

County Mineral County, NV

The radar

The Reno radar (KRGX), 158 km from the middle of the area, began a volume at 01:59 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, 1.9 hours before the alert went out and 122 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: 196 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1764 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: -7 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.

527 
WGUS55 KREV 070156
FFWREV
NVC021-070400-
/O.NEW.KREV.FF.W.0021.140807T0156Z-140807T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RENO NV
656 PM PDT WED AUG 6 2014

THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A

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

* UNTIL 900 PM PDT

* AT 649 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. THIS STORM
  IS PRODUCING TORRENTIAL RAINFALL OF 1 INCH OR MORE IN 30 TO 40 
  MINUTES.

* THE STORM PRODUCING FLASH FLOODING WILL AFFECT AREAS SOUTHEAST OF
  HAWTHORNE INCLUDING THE HAWTHORNE ARMY DEPOT AND HIGHWAY 95 EAST 
  OF HAWTHORNE .

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3858 11861 3858 11851 3841 11851 3842 11862

$$

JHW

2 follow-up statements

189 
WGUS75 KREV 070240
FFSREV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
740 PM PDT WED AUG 6 2014

NVC021-070400-
/O.CON.KREV.FF.W.0021.000000T0000Z-140807T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MINERAL NV-
740 PM PDT WED AUG 6 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 PM PDT FOR
CENTRAL MINERAL COUNTY...

AT 740 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT HEAVY RAIN HAS MOVED NORTH OUT OF THE WARNED AREA. HOWEVER... 
FLASH FLOODING MAY BE DELAYED CONSIDERABLY FROM THE PERIOD OF 
HEAVIEST RAIN. THEREFORE...THE THREAT FOR FLASH FLOODING REMAINS 
FOR HIGHWAY 95 EAST OF HAWTHORNE AND AT THE HAWTHORNE ARMY DEPOT.  

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.

&&

LAT...LON 3858 11861 3858 11851 3841 11851 3842 11862

$$

SNYDER

768 
WGUS75 KREV 070352
FFSREV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
852 PM PDT WED AUG 6 2014

NVC021-070402-
/O.EXP.KREV.FF.W.0021.000000T0000Z-140807T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MINERAL NV-
852 PM PDT WED AUG 6 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 900 PM PDT FOR CENTRAL
MINERAL COUNTY...

THE THREAT FOR CONTINUED FLASH FLOODING HAS DIMINISHED. REMEMBER THAT
MINOR FLOODING OR RUNOFF MAY CONTINUE IN LOW SPOTS FOR SEVERAL HOURS.

LAT...LON 3858 11861 3858 11851 3841 11851 3842 11862

$$

SNYDER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 5:24 PM PDT	Special Weather Statement	REV	Mineral	51 min
Aug 6, 6:02 PM PDT	Areal Flood Advisory	REV	Mineral	118 min
Aug 6, 6:24 PM PDT	Flash Flood Warning	REV	Mineral	111 min
Aug 6, 8:35 PM PDT	Flash Flood Warning Emergency	REV	Douglas	3 hr
Aug 6, 10:04 PM PDT	Flash Flood Warning Emergency	REV	Douglas	3 hr
Aug 7, 4:42 PM PDT	Special Weather Statement	REV		48 min

Nearby

Flash Flood Warnings in Nevada, 2014 Every flash flood warning in 2014

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.