WY2016 Storm 47 – Strong

SATURDAY, 160220 0100 PST ——

47 Rates as a Strong Storm!

47. Third storm in a series of West Coast shoreline invaders,
this one aimed at California, reaching the entire state to some extent.
The very last stretch of SoCal just got clouds, but that made for beautiful
day in SD! Two bands of clouds on two days, same storm,
sudden finish! Thunderstorms, rainbows, heavy snow. Then when it all quit,
in 40 minutes it looked like someone threw a switch. Never seen anything like it.
Not a cloud anywhere, even the high Sierra. In the end, a very productive storm.

Storm 47 dropped 40.48 Inches on water on the 65 sampled cities below, an average of .62 of an inch per city.

Storm 47 Wed Thurs
Strong 160217 160218 Totals
Crescent City 0.48 0.80 1.28
Eureka 0.48 0.78 1.26
Fortuna 0.49 0.43 0.92
Laytonville 0.84 1.33 2.17
Mendocino 0.73 0.26 0.99
Ukiah 0.45 0.86 1.31
Sebastopol 0.67 0.27 0.94
Calistoga 0.83 0.35 1.18
Grants Pass 0.51 1.11 1.62
Yreka 0.52 0.20 0.72
Redding 0.16 0.58 0.74
Red Bluff 0.26 0.19 0.45
Chiloquin OR 0.01 0.43 0.44
Alturas 0.22 0.07 0.29
Susanville 0.28 0.12 0.4
Reno 0.17 0.25 0.42
Ely NV 0.08 0.42 0.5
Winnemucca 0 0.14 0.14
Nevada City 0.64 0.88 1.52
Yuba City 0.48 0.02 0.5
Sacramento 0.55 0.35 0.9
West Point 0.75 0.43 1.18
Twain-Harte 0.35 0.51 0.86
Oakland 0.28 0.16 0.44
San Francisco 0.45 0.08 0.53
Boulder Creek 1.46 0.43 1.89
Monterey 0.81 0.13 0.94
Big Sur 0.40 0.12 0.52
San Jose 0.27 0.07 0.34
Hollister 0.46 0.17 0.63
Merced 0.25 0.14 0.39
Mpsa County 0.15 0.99 1.14
Oakhurst 0.17 1.12 1.29
Fresno 0.04 0.29 0.33
Hanford 0.003 0.01 0.013
Squaw Valley 0.02 0.51 0.53
Visalia 0.01 0.11 0.12
Porterville 0.05 0.23 0.28
Camp Nelson 0.41 0.79 1.2
Bakersfield 0.04 0.14 0.18
Lee Vining 0.14 0.61 0.75
Bishop 0 0.04 0.04
Mojave 0.22 0.11 0.33
Tehachapi 0.44 0.41 0.85
Frazier Park 0.28 0.05 0.33
Paso Robles 0.33 0.08 0.41
San Luis Obispo 0.18 0.27 0.45
Lompoc 0.20 0.35 0.55
Ojai 0.22 0.52 0.74
Santa Barbara 0.15 0.46 0.61
Big Bear Lake 0.57 0.14 0.71
Glendale 0.57 0.65 1.22
DTWNLA 0.43 0.15 0.58
Yucaipa 0.13 0.14 0.27
Idyllwild 0.01 0.19 0.2
Hemet 0.03 0.13 0.16
Catalina 0.34 0.06 0.4
San Juan Cap 0.16 0.13 0.29
Valley Center 0 0.09 0.09
San Diego 0 0 0
Ensenada 0 0 0
Grand Canyon 0 0 0
Sedona 0 0 0
Flagstaff 0 0.003 0.003
Tucson 0 0 0
TOTALS 19.623 20.853 40.476
AVERAGES 0.301 0.320 0.622

 

FRIDAY, 160219 0100 PST ———

Vanished!

Storm-47-Exit.png

That was the most amazing disappearing act I have ever seen! From rain-filled sky to pure blue sunny sky, with no wind at all, not a wisp of cloud in sight in 45 minutes or less. That storm gave one last shower and POOF! it was GONE.

THURSDAY, 160218 1000 PST——–

Avalanche Conditions

The heavy overnight snow is not sitting still atop the hardened icy snow layer underneath it, and avalanches are happening. The snow already on the ground underwent two weeks of warm daytime weather and overnight freezing to make it icy and smooth. The new snow is not remaining put. Dangerous mountain driving conditions reported on both sides of the Sierra in NorCal, and certainly similar conditions exist southward as well.  (@sierraavalanche)

THURSDAY, 160218 0600 PST——–

Storm 47 Morning Updates for 160218 at 0900 PST

Isolated T-storms and areas of heavy mountain snow diminishing toward sundown will take this storm towards its conclusion.

Isolated-T-storms.jpg

  • Overnight snowfall in the N. Sierra significant (@KirkwoodMtn) and will continue until this afternoon in the So.Sierra (@NWSHanford)
  • A modest squall line of thunderstorms is moving through the Bay Area (@WthrmnSlaughter) (NWS Radar)
  • Strong winds in Basin and Range geographic province CA, AZ, NV, UT from southerly directions (SW, S, SE) (wunderground wundermap)
  • 20″ New snow at Squaw Valley ski resort, but high winds and avalanche activity in the Northern Sierra are causing traffic delays (@squawalpine)
  • 6″ New snow in Bridgeport, CA. (@SPaulsonKTVU)
  • 18″ New snow at Mammoth Mountain. Lift opening delays due to high winds and whiteouts. (@MammothMountain)
  • The second rain band pushed SF Bay Area rain totals from Storm 47 at hilltop locations over  1.00″ mark overnight. (@SPaulsonKTVU)
  • Chain controls are in effect in the northern Sierra. (@CBSSacramento)

This storm rates at least a “significant” in impact and intensity – when the totals are observed after midnight, it might even rate as “strong.” My scale goes: weak, minor, significant, strong, major.

Mammoth.jpg

WEDNESDAY, 160217 2000 PST——–

Storm 47 Evening Updates for 160217 at 2100 PST

  • Some significant rainfall totals in the Mojave desert mountains in the last few hours.
  • Pockets of heavy rain now moving through the Bay Area.
  • Power is out in Concord, CA.: crews working to restore.
  • Thunderstorm over San Francisco International Airport (SFO)  at 7:30 pm PST with 50 MPH wind gusts.
  • High gusty southerly winds in NorCal. Warning period extended to 4am.
  • South to north flowing squall line marching west to east across the Sacramento Valley and into Northern Sierra. In the San Joaquin Valley, these squalls are expected a few hours later with lightning. Lightning at SFO around 7:30 pm.
  • The first band of rain was very unproductive as it came through Fresno during daylight, however both bands of rain are showing much higher productivity after nightfall.
  • Earlier today – Death Valley: hot and windy, with rain.
  • Earlier today – Yakima River, WA. above flood stage.
  • Rainfall in CenCal from first rain band: Merced 0.00″; Mariposa County Upper Foothills 0.00″; Oakhurst 0.03″; Fresno 0.04″; Hanford TRACE; Squaw Valley 0.02″; East Visalia 0.01″; Porterville 0.05″; Camp Nelson 0.41″; Bakersfield TRACE; Lee Vining 0.00″; Bishop 0.00″; Mojave 0.22″; Tehachapi 0.44″; Frazier Park 0.27″; Paso Robles 0.00″; San Luis Obispo 0.01″ [SW 50 MPH Wind]; Lompoc 0.10″ [SW 30 MPH Wind] Source: Wunderground
Storm47Radar-160217-2000.jpg

National Weather Service Radar – Mosaic View – 160217 2000 PST

WEDNESDAY, 160217 0800 PST ——–

Cool Photo!

Just before dawn on the west coast, the aurora borealis over Alaska and Canada, and Storm 47 in faded moonlight in the lower center.

Cba3OMzUEAAG3Na

UW-Madison CIMSS ‏@UWCIMSS 2h2 hours ago (Twitter) S-NPP #VIIRS view of the #aurora over Alaska & Canada while light from the waxing moon illuminates west coast storm.

Storm 47 is expected to be a significant Pacific storm system aiming at Oregon and NorCal, that will also have some impact on CenCal and SoCal. Significant means more impact on the water year than a minor storm, but less impact than a strong or major storm.

SoCal Desert (San Bernardino-Riverside-Imperial-SD)

Very high wind in the Painted and Mojave Desert, light showers in the coast and Peninsular Ranges.

South Central Coast and Mountains (Santa Barbara-Los Angeles)

Very high winds and moderate rainfall in the mountains.

CenCal (Sierra Nevada, San Joaquin Valley, Central Coast)

Winter storm warning for the Sierra Nevada. About a foot of snow. Light showers in San Joaquin Valley – a tenth on an inch or less, and not much more for the Central Coast. Strong southeasterly winds advisory for the San Joaquin Valley. Strong southerly wind gusts in the Coast Range above 1,000 feet. Hazardous weather in the San Joaquin Valley: late night thunderstorms.

NorCal

The powerful ocean gale at sea arrives over the coastal waters of California. Light to Moderate valley rain and mountain snow, and high southerly winds, strongest in the afternoon.

…Damage and precipitation totals in updates.

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