Alert archive / California / Flash Flood Warnings in 2014

Flash Flood Warning 9, NWS Reno, NV

July 17, 2014Mono County, California

NWS Reno, NV issued this flash flood warning at Jul 17, 2014, 4:15 PM PDT for Mono County, California. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 17, 2014, 4:15 PM PDT (23:15 UTC)
Expired: Jul 17, 2014, 7:15 PM PDT
In force: 3 hr
Issued by: NWS Reno, NV
Area: Storm-based polygon
Flood severity: None

County Mono County, CA

The radar

The San Joaquin Valley radar (KHNX), 185 km from the middle of the area, began a volume at 23:18 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.

What was reported inside it

Time	Report	Where	Remark
Jul 17, 4:15 PM PDT	FLASH FLOOD	5 Sw Conway Summit, CA	CHP REPORTING WATER IS COVERING LUNDY LAKE ROAD. EMERGENCY CREWS ARE UNABLE TO REACH AN EMERGENCY CALL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Reno, NV (KREV), launched 12:00Z, 11.3 hours before the alert went out and 200 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2480 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 125 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.

367 
WGUS55 KREV 172315
FFWREV
CAC051-180215-
/O.NEW.KREV.FF.W.0009.140717T2315Z-140718T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RENO NV
415 PM PDT THU JUL 17 2014

THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL MONO COUNTY IN CENTRAL CALIFORNIA...
  THIS INCLUDES THE CITIES OF...MONO LAKE...LEE VINING...

* UNTIL 715 PM PDT

* AT 409 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. THIS STORM
  IS PRODUCING TORRENTIAL RAINFALL OF ONE HALF INCH IN 30 MINUTES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO TIOGA PASS 
  AND AREAS DOWNSTREAM TOWARDS LEE VINING. .

* ROCK AND MUDSLIDE ARE POSSIBLE IN AREAS OF STEEP TERRAIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS FLOODING IS IMMINENT OR OCCURRING. PEOPLE
IN FLOOD PRONE AND LOW LYING AREAS SHOULD MOVE TO HIGHER GROUND. DO
NOT ATTEMPT TO CROSS SWIFT FLOWING WATER BY FOOT OR AUTOMOBILE.

&&

LAT...LON 3808 11900 3783 11890 3779 11921 3785 11923
      3790 11923 3790 11926 3795 11932 3802 11932

$$

TF

2 follow-up statements

021 
WGUS75 KREV 172339
FFSREV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
439 PM PDT THU JUL 17 2014

CAC051-180215-
/O.CON.KREV.FF.W.0009.000000T0000Z-140718T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONO CA-
439 PM PDT THU JUL 17 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM PDT FOR
CENTRAL MONO COUNTY...

AT 435 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS WITH TORRENTIAL RAINS OVER THE TIOGA PASS AND 
LUNDY LAKE AREAS. RAINFALL AMOUNTS OF OVER ONE INCH PER HOUR ARE BEING
ESTIMATED BY RADAR. THE CALIFORNIA HIGHWAY PATROL REPORTED A MUDSLIDE
CLOSING THE ROADWAY TO LUNDY LAKE. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MONO LAKE AND
LEE VINING, AND TIOGA PASS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING IS OCCURRING OR IMMINENT. RAPID RISES IN CREEKS AND STREAMS
CAN SWEEP YOU OFF YOUR FEET AND WASH OUT CAMPSITES.

&&

LAT...LON 3808 11900 3783 11890 3779 11921 3785 11923
      3790 11923 3790 11926 3795 11932 3802 11932

$$
CS

857 
WGUS75 KREV 180130
FFSREV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
630 PM PDT THU JUL 17 2014

CAC051-180140-
/O.CAN.KREV.FF.W.0009.000000T0000Z-140718T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONO CA-
630 PM PDT THU JUL 17 2014

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL MONO
COUNTY...

THE STORMS THAT EARLIER PROMPTED THE FLASH FLOOD WARNING HAVE
DISSIPATED...WITH A DIMINISHING FLOOD THREAT. REMEMBER THAT MINOR
FLOODING OF LOW SPOTS MAY CONTINUE FOR SEVERAL HOURS.

LAT...LON 3808 11900 3783 11890 3779 11921 3785 11923
      3790 11923 3790 11926 3795 11932 3802 11932

$$

TF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 7:50 PM PDT	Special Weather Statement	REV	Alpine	40 min
Jul 17, 1:20 PM PDT	Severe Thunderstorm Warning	REV	Alpine	31 min
Jul 17, 2:32 PM PDT	Areal Flood Advisory	REV	Alpine, Mono	3 hr
Jul 17, 3:17 PM PDT	Severe Thunderstorm Warning	REV	Nevada, Placer	43 min
Jul 17, 3:27 PM PDT	Areal Flood Advisory	REV	Mono	3 hr
Jul 17, 3:58 PM PDT	Special Weather Statement	REV	Mono	47 min

Nearby

Flash Flood Warnings in California, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.