Alert archive / Nevada / Flash Flood Warnings in 2015

Flash Flood Warning 4, NWS Reno, NV

June 30, 2015Lyon County, Storey County, Nevada

NWS Reno, NV issued this flash flood warning at Jun 30, 2015, 7:28 PM PDT for Lyon County, Storey 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: Jun 30, 2015, 7:28 PM PDT (02:28 UTC)
Expired: Jun 30, 2015, 10:30 PM PDT
In force: 3 hr
Issued by: NWS Reno, NV
Area: Storm-based polygon
Flood severity: None

Counties Lyon County, NV, Storey County, NV

The radar

The Reno radar (KRGX), 39 km from the middle of the area, began a volume at 02:29 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, 2.5 hours before the alert went out and 97 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: 102 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 3368 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: -6 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.

396 
WGUS55 KREV 010228
FFWREV
NVC019-029-010530-
/O.NEW.KREV.FF.W.0004.150701T0228Z-150701T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RENO NV
728 PM PDT TUE JUN 30 2015

THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL LYON COUNTY IN WEST CENTRAL NEVADA...
  STOREY COUNTY IN WESTERN NEVADA...

* UNTIL 1030 PM PDT
    
* AT 726 PM PDT...DOPPLER RADAR INDICATED A LINE OF THUNDERSTORM S 
  PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. TORRENTIAL RAIN IS 
  OCCURRING AND FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... HIGHWAY 50 
  FROM STAGECOACH TO SILVER SPRINGS...SILVER SPRINGS...STAGECOACH 
  AND SILVER 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.

ACT QUICKLY TO PROTECT YOUR LIFE.

&&

LAT...LON 3950 11922 3939 11917 3929 11946 3941 11950

$$

MB

2 follow-up statements

676 
WGUS75 KREV 010420
FFSREV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
920 PM PDT TUE JUN 30 2015

NVC019-029-010530-
/O.CON.KREV.FF.W.0004.000000T0000Z-150701T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LYON NV-STOREY NV-
920 PM PDT TUE JUN 30 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM PDT FOR
NORTH CENTRAL LYON AND STOREY COUNTIES...

AT 917 PM PDT...DOPPLER RADAR INDICATED MOST OF THE HEAVY RAIN HAD 
ENDED ACROSS THE WARNED AREA...BUT RAINFALL ESTIMATES OVER THE 
WARNED AREA EXCEED 1 INCH IN SOME LOCATIONS. 

WHILE THE RAIN HAS DECREASED FLOODING...ESPECIALLY OF LOW LYING AND 
POOR DRAINAGE AREAS...IS POSSIBLE THROUGH LATE THIS EVENING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... 
SILVER SPRINGS AND STAGECOACH. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3950 11922 3939 11917 3929 11946 3941 11950

$$

551 
WGUS75 KREV 010512
FFSREV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
1012 PM PDT TUE JUN 30 2015

NVC019-029-010520-
/O.CAN.KREV.FF.W.0004.000000T0000Z-150701T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LYON NV-STOREY NV-
1012 PM PDT TUE JUN 30 2015

...THE FLASH FLOOD WARNING FOR NORTH CENTRAL LYON AND STOREY COUNTIES
IS CANCELLED...

THE HEAVY RAIN HAS ENDED. WHILE SIGNIFICANT FLOODING IS NO LONGER A 
THREAT...THERE MAY STILL BE AREAS OF PONDING ON SOME ROADWAYS AND 
STANDING WATER IN LOW LYING AND POOR DRAINAGE AREAS. USE EXTRA 
CAUTION AT NIGHT WHEN FLOODING IS MORE DIFFICULT TO SEE. DO NOT 
VENTURE INTO AREAS COVERED BY WATER AS THE WATER MAY BE DEEPER THAN 
IT APPEARS. 

LAT...LON 3950 11922 3939 11917 3929 11946 3941 11950

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 5:23 PM PDT	Special Weather Statement	REV	Lyon	22 min
Jun 30, 6:07 PM PDT	Special Weather Statement	REV	Storey	38 min
Jun 30, 6:25 PM PDT	Special Weather Statement	REV	Storey	50 min
Jun 30, 6:29 PM PDT	Special Weather Statement	REV	Douglas	46 min
Jun 30, 6:39 PM PDT	Flash Flood Warning	REV	Storey, Washoe	111 min
Jun 30, 7:16 PM PDT	Special Weather Statement	REV	Storey	59 min
Jun 30, 7:35 PM PDT	Areal Flood Advisory	REV	Washoe	3 hr
Jun 30, 8:02 PM PDT	Special Weather Statement	REV	Storey	43 min
Jun 30, 8:22 PM PDT	Special Weather Statement	REV		23 min
Jul 1, 4:55 PM PDT	Special Weather Statement	REV		50 min
Jul 1, 4:59 PM PDT	Special Weather Statement	REV	Churchill	61 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.