Alert archive / Nevada / Flash Flood Warnings in 2017

Flash Flood Warning 15, NWS Reno, NV

July 24, 2017Lyon County, Nevada

NWS Reno, NV issued this flash flood warning at Jul 24, 2017, 7:57 PM PDT for Lyon County, Nevada. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 24, 2017, 7:57 PM PDT (02:57 UTC)
Expired: Jul 24, 2017, 8:57 PM PDT
In force: 60 min
Issued by: NWS Reno, NV
Area: Whole counties

County Lyon County, NV

The radar

The Reno radar (KRGX), 85 km from the middle of the area, began a volume at 02:58 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, 3.0 hours before the alert went out and 105 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: 125 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 2820 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

609 
WGUS55 KREV 250257
FFWREV
NVC019-250415-
/O.NEW.KREV.FF.W.0002.170725T0257Z-170725T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Reno NV
757 PM PDT MON JUL 24 2017

The National Weather Service in Reno has issued a

* Flash Flood Warning for...
  Central Lyon County in west central Nevada...

* Until 915 PM PDT

* At 751 PM PDT, Doppler radar indicated thunderstorms producing 
  torrential rain and accumulating dime sized hail near US Route 95 
  Alternate between Fort Churchill Station and Wabuska. Portions of 
  this areas have already seen 2-3 inches of rainfall today and the 
  threat for additional flash flooding impacting this portion US 95 
  Alternate is elevated as a result. 

* Some locations that will experience flooding include...
  US Route 95 Alternate from Fort Churchill Station to Wabuska.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not attempt to cross areas of moving water on roadways. 

Please report flooding to your local law enforcement agency when you 
can do so safely.

&&

LAT...LON 3910 11928 3921 11941 3944 11916 3942 11912
      3939 11912 3939 11911 3925 11893 3924 11893

$$

TF

1 follow-up statement

600 
WGUS75 KREV 250357
FFSREV

Flash Flood Statement
National Weather Service Reno NV
857 PM PDT MON JUL 24 2017

NVC019-250407-
/O.CAN.KREV.FF.W.0002.000000T0000Z-170725T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lyon NV-
857 PM PDT MON JUL 24 2017

...THE FLASH FLOOD WARNING FOR CENTRAL LYON COUNTY IS CANCELLED...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 3910 11928 3921 11941 3944 11916 3942 11912
      3939 11912 3939 11911 3925 11893 3924 11893

$$

TF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 5:25 PM PDT	Special Weather Statement	REV	Storey	35 min
Jul 24, 5:53 PM PDT	Flash Flood Warning	REV	Churchill, Lyon, Storey, Washoe	3 hr
Jul 24, 6:41 PM PDT	Special Weather Statement	REV		49 min
Jul 24, 8:56 PM PDT	Special Weather Statement	REV	Storey	49 min
Jul 25, 3:40 AM PDT	Flash Flood Watch	REV	Churchill, Lyon, Mineral, Pershing, Washoe	17 hr
Jul 25, 11:46 AM PDT	Special Weather Statement	REV	Churchill, Douglas, Lyon, Mineral, Storey	59 min
Jul 25, 1:45 PM PDT	Severe Thunderstorm Warning	REV	Lyon	24 min
Jul 25, 2:06 PM PDT	Special Weather Statement	REV	Storey	24 min
Jul 25, 2:10 PM PDT	Special Weather Statement	REV		50 min

Nearby

Flash Flood Warnings in Nevada, 2017 Every flash flood warning in 2017

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.