Alert archive / Nevada / Flash Flood Watches in 2013

Flash Flood Watch 4, NWS Reno, NV

July 27, 2013Lyon County, Mineral County, Nevada; Mono County, California

NWS Reno, NV issued this flash flood watch at Jul 27, 2013, 8:50 AM PDT for Lyon County, Mineral County, Nevada; Mono County, California. It took effect at Jul 27, 2013, 2:00 PM PDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Jul 27, 2013, 8:50 AM PDT (15:50 UTC)
In effect from
Jul 27, 2013, 2:00 PM PDT
Expired
Jul 27, 2013, 9:00 PM PDT
In force
7 hr
Issued by
NWS Reno, NV
Flood severity
None

Counties Mono County, CA, Lyon County, NV, Mineral County, NV

The radar

The Reno radar (KRGX), 150 km from the middle of the area, began a volume at 15:50 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, 3.8 hours before the alert went out and 131 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-pSkew-T log-p diagram, Reno, NV at 12:00Z on 2013-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Reno, NV at 12:00Z on 2013-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -18 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2340 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-18 m²/s²
0-3 km storm-relative helicity
45 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Reno, NV wrote its last area forecast discussion before this flash flood watch went out at Jul 27, 2:48 AM PDT, 6 hours 2 minutes earlier.

Area forecast discussion, Jul 27, 2:48 AM PDT, 6 hours 2 minutes before
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Hazardous weather outlook, Jul 27, 5:47 AM PDT, 3 hours 3 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RENO NV
547 AM PDT SAT JUL 27 2013

CAZ070>073-NVZ001>005-280100-
SURPRISE VALLEY CALIFORNIA-LASSEN-EASTERN PLUMAS-
EASTERN SIERRA COUNTIES-GREATER LAKE TAHOE AREA-MONO-
MINERAL AND SOUTHERN LYON COUNTIES-GREATER RENO-CARSON CITY-
MINDEN AREA-WESTERN NEVADA BASIN AND RANGE INCLUDING PYRAMID LAKE-
NORTHERN WASHOE COUNTY-
547 AM PDT SAT JUL 27 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE EASTERN SIERRA...
NORTHEAST CALIFORNIA AND WESTERN NEVADA.

.DAY ONE...TODAY AND TONIGHT

ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO
DEVELOP ALONG THE EASTERN SIERRA AND WESTERN NEVADA THIS
AFTERNOON AND SHOULD CONTINUE INTO THE EVENING. LOCALLY HEAVY
RAIN...HAIL...GUSTY WINDS AND DEADLY LIGHTNING CAN BE EXPECTED
WITH THE STORMS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

SCATTERED SHOWERS AND THUNDERSTORMS ARE AGAIN POSSIBLE ON SUNDAY
...MAINLY SOUTH OF INTERSTATE 80. HIGH PRESSURE WILL THEN START TO
BUILD INTO THE REGION ON MONDAY WITH DRY CONDITIONS AND NEAR
NORMAL TEMPERATURES THROUGH NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...
SKYWARN SPOTTER ACTIVATION IS POSSIBLE THIS AFTERNOON. SPOTTERS
ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER ACCORDING TO STANDARD
OPERATING PROCEDURES.

FOR MORE INFORMATION FROM THE NATIONAL WEATHER SERVICE VISIT...
HTTP://FORECAST.WEATHER.GOV/HAZARDS/REV  (ALL LOWER CASE)

O'HARA

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 26, 5:49 PM PDTSpecial Weather StatementREVLyon116 min
Jul 26, 6:36 PM PDTAreal Flood AdvisoryREVChurchill114 min
Jul 26, 7:38 PM PDTSpecial Weather StatementREVLyon37 min
Jul 26, 7:44 PM PDTSpecial Weather StatementREV91 min
Jul 26, 7:53 PM PDTSpecial Weather StatementREVStorey52 min
Jul 27, 1:55 PM PDTFlash Flood WarningREVMineral3 hr
Jul 27, 4:30 PM PDTFlash Flood WarningREVDouglas3 hr
Jul 27, 1:17 PM PDTSpecial Weather StatementREVMono43 min

Nearby

Flash Flood Watches in Nevada, 2013Flash Flood Watches in California, 2013Every flash flood watch in 2013

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.