Alert archive / Nevada / Flash Flood Warnings in 2025

Flash Flood Warning 13, NWS Reno, NV

August 27, 2025Storey County, Washoe County, Nevada

NWS Reno, NV issued this flash flood warning at Aug 27, 2025, 4:04 PM PDT for Storey County, 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: Aug 27, 2025, 4:04 PM PDT (23:04 UTC)
Expired: Aug 27, 2025, 6:00 PM PDT
In force: 116 min
Issued by: NWS Reno, NV
Area: Storm-based polygon
Flood severity: None

Counties Storey County, NV, Washoe County, NV

The radar

The Reno radar (KRGX), 23 km from the middle of the area, began a volume at 23:03 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, 11.1 hours before the alert went out and 108 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: 12 J/kg
Mixed-layer CIN: -179 J/kg
Mixed-layer LCL: 1558 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

867 
WGUS55 KREV 272304
FFWREV
NVC029-031-280100-
/O.NEW.KREV.FF.W.0013.250827T2304Z-250828T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Reno NV
404 PM PDT Wed Aug 27 2025

The National Weather Service in Reno has issued a

* Flash Flood Warning for...
  Storey County in western Nevada...
  Southern Washoe County in western Nevada...

* Until 600 PM PDT.

* At 404 PM PDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to 1 inch of rain has 
  fallen. Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  I-80 near the Tahoe-Reno Industrial Center and portions of USA 
  Parkway (SR-439).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3958 11947 3958 11945 3956 11943 3954 11942
      3951 11942 3950 11943 3951 11947 3953 11950
      3956 11950 3957 11950

FLASH FLOOD...RADAR INDICATED

$$

TF

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 5:56 PM PDT	Areal Flood Advisory	REV	Washoe	111 min
Aug 27, 12:45 AM PDT	Flood Watch	REV	Douglas, Lyon, Mineral, Storey, Washoe	21 hr
Aug 27, 12:12 PM PDT	Special Weather Statement	REV		33 min
Aug 27, 12:14 PM PDT	Special Weather Statement	REV	Douglas	31 min
Aug 27, 12:49 PM PDT	Special Weather Statement	REV	Storey	26 min
Aug 27, 12:54 PM PDT	Special Weather Statement	REV	Storey	36 min
Aug 27, 1:00 PM PDT	Special Weather Statement	REV		15 min
Aug 27, 1:09 PM PDT	Special Weather Statement	REV	Douglas	36 min
Aug 27, 1:32 PM PDT	Special Weather Statement	REV		28 min
Aug 27, 1:46 PM PDT	Special Weather Statement	REV		29 min
Aug 27, 1:50 PM PDT	Special Weather Statement	REV		25 min
Aug 27, 1:53 PM PDT	Severe Thunderstorm Warning	REV	Washoe	37 min
Aug 27, 2:05 PM PDT	Special Weather Statement	REV	Lyon	25 min
Aug 27, 2:11 PM PDT	Special Weather Statement	REV		34 min
Aug 27, 2:14 PM PDT	Severe Thunderstorm Warning	REV	Washoe	31 min
Aug 27, 2:23 PM PDT	Special Weather Statement	REV		37 min
Aug 27, 2:31 PM PDT	Special Weather Statement	REV	Lyon	29 min
Aug 27, 3:03 PM PDT	Special Weather Statement	REV	Storey	27 min
Aug 27, 3:17 PM PDT	Severe Thunderstorm Warning	REV	Lyon, Storey, Washoe	58 min
Aug 27, 3:18 PM PDT	Areal Flood Advisory	REV	Lyon, Storey, Washoe	3 hr
Aug 27, 3:26 PM PDT	Special Weather Statement	REV	Douglas	34 min
Aug 27, 3:31 PM PDT	Special Weather Statement	REV	Storey	29 min
Aug 27, 3:33 PM PDT	Severe Thunderstorm Warning	REV	Churchill, Lyon	27 min
Aug 27, 3:56 PM PDT	Areal Flood Advisory	REV	Douglas	3 hr
Aug 27, 4:00 PM PDT	Special Weather Statement	REV	Churchill	30 min
Aug 27, 4:21 PM PDT	Special Weather Statement	REV	Churchill	24 min
Aug 27, 4:54 PM PDT	Special Weather Statement	REV		51 min

Nearby

Flash Flood Warnings in Nevada, 2025 Every flash flood warning in 2025

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.