Alert archive / California / Winter Storm Warnings in 2010

Winter Storm Warning 5, NWS Reno, NV

March 29, 2010Douglas County, Washoe County, Nevada; 4 counties in California

NWS Reno, NV issued this winter storm warning at Mar 29, 2010, 11:12 AM PDT for Douglas County, Washoe County, Nevada; 4 counties in California. It took effect at Mar 30, 2010, 5:00 AM PDT. It was in force for 18 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 29, 2010, 11:12 AM PDT (18:12 UTC)
In effect from: Mar 30, 2010, 5:00 AM PDT
Expired: Mar 30, 2010, 11:00 PM PDT
In force: 18 hr
Issued by: NWS Reno, NV

Counties Alpine County, CA, El Dorado County, CA, Nevada County, CA, Placer County, CA, Douglas County, NV, Washoe County, NV

The radar

The Reno radar (KRGX), 86 km from the middle of the area, began a volume at 18:15 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, 6.2 hours before the alert went out and 175 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: 2662 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 539 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 winter storm warning 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 winter storm warning went out at Mar 29, 6:31 AM PDT, 4 hours 41 minutes earlier.

Area forecast discussion, Mar 29, 6:31 AM PDT, 4 hours 41 minutes before

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Hazardous weather outlook, Mar 29, 5:51 AM PDT, 5 hours 21 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RENO NV
551 AM PDT MON MAR 29 2010

CAZ070>073-NVZ001>005-300100-
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-
551 AM PDT MON MAR 29 2010

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

.DAY ONE...TODAY AND TONIGHT

FOR THE TAHOE BASIN...
A LAKE WIND ADVISORY FOR LAKE TAHOE REMAINS IN EFFECT UNTIL 11 AM
PDT THIS MORNING.
A HIGH WIND WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
11 AM PDT TUESDAY.

FOR THE NORTHERN SIERRA AND FAR NORTHERN WASHOE COUNTY...
A HIGH WIND WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
5 AM PDT TUESDAY.

FOR THE RENO...CARSON CITY...MINDEN AREA...
A HIGH WIND WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
5 PM PDT TUESDAY.

FOR MONO COUNTY... A HIGH WIND WARNING REMAINS IN EFFECT FROM 5
PM THIS AFTERNOON TO 5 PM PDT TUESDAY.

A SLOW MOVING...VERY STRONG COLD FRONT WILL MOVE INTO THE NORTHERN
AND CENTRAL SIERRA TONIGHT...AND WILL MOVE THROUGH THE SOUTHERN
SIERRA AND WESTERN NEVADA ON TUESDAY.

AHEAD OF THE COLD FRONT EXTREMELY STRONG WINDS WILL AFFECT THE
AREA BEGINNING THIS AFTERNOON AND CONTINUING OVERNIGHT. DAMAGING
WIND GUSTS OF OVER 70 MPH ARE EXPECTED. PLEASE REFER TO WWUS75
KREV RNONPWREV FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

A BLIZZARD WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY EVENING.

A POWERFUL COLD FRONT WILL MOVE THROUGH THE CENTRAL SIERRA ON
TUESDAY. HEAVY SNOW AND STRONG WINDS WILL COMBINE TO CREATE
BLIZZARD CONDITIONS IN THE TAHOE BASIN AND ALPINE COUNTY
THROUGHOUT THE DAY ON TUESDAY. PLEASE REFER TO WWUS45 KREV
RNOWSWREV FOR FURTHER DETAILS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS ANTICIPATED STARTING THIS AFTERNOON AND
CONTINUING OVERNIGHT. SPOTTERS ARE ENCOURAGED TO REPORT SNOWFALL
TOTALS AND SIGNIFICANT WIND INFORMATION TO THE NATIONAL WEATHER
SERVICE IN RENO.

O'HARA

HTTP://WEATHER.GOV/RENO

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 29, 10:52 AM PDT	Dust Storm Warning	REV	Churchill, Lyon, Pershing, Washoe	9 hr
Mar 29, 11:12 AM PDT	Winter Weather Advisory	REV	Lassen, Modoc, Plumas, Sierra	28 hr

Nearby

Winter Storm Warnings in California, 2010 Winter Storm Warnings in Nevada, 2010 Every winter storm warning in 2010

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.