It is April 23, 2010, 1:00 a.m., and IT’S STILL HERE!
Katabatic, downhill and offshore winds flare up as high pressure moves in from the northwest, thus ending the storm for our area. This morning, it is overcast, as the storm is still throwing clouds over us from its backside. But the offshore direction of air has cleared the coast, resulting in bright California sunshine. You can see the Santa Anas, Sundowners showing up in Southern California. Since the inland air is so cold, these Santa Anas are no doubt cold.
It is April 22, 2010, 12:00 noon, and IT’S STILL HERE!
Check out the dramatic exit. Fresno is literally located about 100 miles from the storm’s edge right now. In its wake, powerful northeasterly dry winds, coming from downhill after taking a retrograde journey from the Rockies, over the Great Basin, and subject to powerful warming effects. This may dry us up so fast you may want to make sure any wooden sculptures you have are protected.
It is April 22, 2010, 1:00 a.m., and guess what. IT’S STILL HERE!
High pressure is trying to shove it out of the way, but the powerful behemoth is hard to boss around. It has, however, broken away from the Aleutian Low and is now a completely independent CUTOFF LOW. Believe it or not, a cutoff low cruising by this area this time of year is generally not an unusual occurrence.
It is April 21, 2010, about 3:00 a.m. Rainy season here at davidprasad.com is now officially over. It was a great rainy season and…
One of the most persistent end-of-season storms ever, Storm 42 of the 2009-2010 season of rainfall continues on a West Coast rampage, but signs of it fading are visible today. The Jet Stream that has been running straight up the Pacific Coast is losing steam, and with it, the importation of subtropical moisture. As for the mass of cold North Pacific air that plunged down here and is now moving inland, its movement is part of the changes in effect bringing a slow end to storm 42. That said, 42 will be here for another day or two. As for the weather pattern itself, the question being will this happen again despite the onset of Summer weather being less than a month away. Will another cutoff low come down from the gulf, making it the third such low this month. I speculate why not. General weather patterns can stay in place for months if El Nino is behind it regardless of what time of year it is supposed to be.
UPDATE 5 Tuesday, April 20, 2010, 10:30 a.m.
Here’s the 10:30 a.m. loop
Here’s the 8:30 a.m. loop:
Wow! Look at these loops! It shows how this storm materialized today. First, out at sea, is a huge cold air mass plunging south from the Aleutian Islands all the way down to the waters just off the West Coast of Mexico. As an equalizer, a band of warm, moist, subtropical air is rushing north, all the way up the West Coast, back to Alaska. Here is a satellite capture this morning (4/20/10) of a wave of cold air from Alaska charging headlong into a strong current of warm air from Baja California, causing a wave of storm clouds to explode into the sky. There will be some severe weather to come out of this clash!
UPDATE 4 Tuesday, April 20, 2010, 8:30 a.m.
Well, i ll be damned. Say hello to Storm 42, stretching the entire West Coast from Baja California to Anchorage, Alaska.
UPDATE 3 Tuesday, April 20, 2010, 2:00 a.m.
This storm appears to be a total dud.
UPDATE 2 Monday, April 19, 2010
Storm 42 can be seen on regular visible Satellite, approaching rapidly from the Pacific Ocean, with thunderstorms popping up in profusion behind the front.
Look what has become of the megablob. It is over the rugged Rio Grande canyon. Maybe it is headed for Oklahoma City? It dropped some rain on San Diego on its journey east, which means it should have been counted as Storm 42. Instead, I got obsessed with the cold air about to invade the Fresno Area by evening time today, with potential for severe t-storms on Tuesday. The cold air core from the Gulf of Alaska has plunged south and is rotating counter-clockwise very fast, with tremendous torque, with very fast winds from the south running up the entire Pacific Coast from California to Alaska. Any flight from San Francisco to Anchorage would be very fast today. When that conveyor belt moves inland, the weather service says to expect severe thunderstorms. The suction on moisture sources along the subtropics could collide with the cold Gulf air from the north over California. This is an amazing display of powerful wind currents.
By the way, tomorrow, April 20, is my unofficial end date for any Rainy Season in Fresno, which begins during the proceeding calendar year on October 1. I think I’ve previously labeled Dec. 10 as the start, but that is the historic day the Great Drought of 1975-77 was broken.
Nope, it wasn t the Moisture Blob, which has wofted on over to Baja California. It is out there, though. See it? Right there in the middle of the picture, that nearly invisible low pressure cell due west of the Mendocino Coast. Apparently, it is going to gel into a serious storm. This is an unusual time for serious storms. But remember, El Nino, warm sea surface temperatures, pulls the weather map down about 20 degrees from where it would otherwise be, so basically we are getting Vancouver weather.
UPDATE 1 – April 18
I was wrong about the big blob of moisture – it wofted like some oversize cloud over to Baja California. The weather folks are referring to the waves of Gulf of Alaska air charging south out at sea. They see those turning into the next California storm. I guess. Not sure.
I think it is that disorganized moisture blob coming up from the direction of Hawaii, located about a fifth of the way to there from here. We are under a quickly collapsing high pressure system right now, which should strengthen a low pressure cell associated with said blob.