January 21-23, 2010 Planes and Storms and Fog

January 26th, 2010 by Bill

I had a few shifts at both LAX and VNY airports during a stormy week in Southern California.  Many California stations recorded their all-time record low barometric pressure reading on January 21.  One of these stations was Los Angeles Airport (LAX), where pressure dropped to 29.07″ at about 1 p.m.!  And, I was the observer on duty when this record occurred!  What are the odds that I would be the weather observer at LAX when the all-time  low pressure was reached?   I work at LAX infrequently —  maybe 15 times each year.  About 87,000 days have passed since LAX opened in 1931, and (a potential) 262,000 eight-hour weather observing shifts.  You do the math — I don’t want to. The undecoded obs from LAX during the timeframe of the lowest pressure (A2907) are pasted below the images.

Below are images from LAX (Jan 21 and 22) and VNY (Jan 23). The first four are from LAX, and show aircraft landing and taking off towards the east, which is somewhat rare. That is Santa Monica Bay and the Malibu coastline in the distance on 1211, The next eight are from LAX on the 22nd. Among these are shots of a storm base to the north, with the L.A. skyline on the right. The storm base exhibits an obvious “clear slot”, which is an area of cloud erosion which is likely due to an RFD (rear-flank downdraft). The low-level shear on this day was strong enough to allow some low-level storm organization and rotation. No lightning was observed with this cell, but it dumped half-inch-sized hail near Beverly Hills.

The remaining images were taken at Van Nuys AP on the 23rd. I was there for a pretty sunrise as a shallow fog bank drifted up to the south end of the runway.

METAR KLAX 211953Z 11003KT 5SM RA BR SCT014 OVC020 12/09 A2911 RMK AO2 SLP855 P0011 T01170094
SPECI KLAX 212006Z 14003KT 2 1/2SM R25R/6000VP6000FT +RA BR SCT014 BKN020 OVC028 12/10 A2910 RMK AO2 P0007
SPECI KLAX 212022Z 17007KT 140V210 3SM RA BR SCT012CB BKN019 OVC028 12/10 A2909 RMK AO2 CB NE MOV N P0018
SPECI KLAX 212039Z 21015G19KT 4SM RA BR BKN012CB BKN022 OVC031 13/11 A2908 RMK AO2 CB NE MOV N P0024

METAR KLAX 212053Z 22015G24KT 3SM RA FEW010 BKN023CB OVC040 13/10 A2907 RMK AO2 SLP844 CB NE MOV N P0026 60037 T01330100 56039 $

SPECI KLAX 212122Z 23014G24KT 2SM -RA BKN014CB OVC022 13/11 A2908 RMK AO2 CB OHD MOV NE P0001 $
SPECI KLAX 212133Z 25018G26KT 7SM R25R/5500VP6000FT -RA FEW014CB SCT022 OVC050 12/09 A2909 RMK AO2 PK WND 25026/2125 CB SE-NE MOV NE P0003 $
METAR KLAX 212153Z 25015KT 10SM FEW015CB SCT030 OVC055 13/10 A2910 RMK AO2 PK WND 25026/2125 RAE39 SLP852 CB E MOV NE P0003 T01280100 $

Posted in 2010, Airports (LAX and VNY), Stormy Skies | No Comments »

2009 Storm Chase Season Summary

January 14th, 2010 by Bill

I enjoyed relatively good success chasing in 2009.  I was the tour director for Tempest Tours for six tours, with a 5-day break in early June.  So, I was looking (or hoping), for storms on 50-60 days from about April 25th to July 4th.  The month of May was rather lame, but June was very active.  My luck at finding tornadoes was okay.  There weren’t really many big tornado days on the Plains from late April to early July, but there were enough isolated-type events to keep chasers busy.

Here is a more detailed breakdown of the spring chase season, in two parts.

From April 25 to May 29 (35 days), I was in chase mode on only 20 days, and two of these wound up busts (no storms observed).  On 15 of the 35 days there was no chase, due to no chance of storms, repositioning, and/or changing tours.  Of course, if there had been a really good chance of tornadic supercells on any of these 15 no-chase days, we would have done our darnedest to have been there.  Of these 20 chase days, 11 were in Texas, 4 were in Oklahoma, 2 were Nebraska and 2 were in Missouri.  The remaining one was in extreme southeast Montana.  And, of these 20 chase days, I would rate 14 as “decent or better” (including supercells, strong convection, etc.), while 6 fell into the “marginal/lame/pathetic” category (busts, high-based junk, little or no lightning or severe wx, etc.).  I saw one brief tornado from a distance during these 35 days — yes — May was lame.  We were, however, on a few storms which contained rain-wrapped tornadoes and/or “tornadoed” at night.  I only had to venture east of I-35 twice (on the two Missouri chases), which was nice.  Except for a couple of mediocre days in western Nebraska and one Missouri day when we ended up on junk in KS, I did no chasing in KS, NE, SD, ND, IA, MN, NM, CO or WY during these five weeks in the heart of spring!  That is amazing.  The best chases were generally in TX and OK, between I-35 on the east and U.S. 83 on the west.

Part two occurred from June 5 to July 4, a 30-day period.  I was in chase mode on 26 days, and only four were no-chase (repositioning or tour-changeover) days.  Of these 26 chase days, 7 were in Nebraska, 6 were in South Dakota, 5 were in Kansas and 5 were in Colorado, two were in Wyoming and one was in Montana.  So, geographically, there was (not surprisingly) a definite shift from the Southern Plains to the Central Plains from May to June.  Of these 26 chase days, 16 receive a “decent or better” rating.  The remaining 10 get the “bust-junky-weak” rating. ( I should add that many of the junky chase days on the central and northern Plains still offered some outstanding photography opportunities.)   I witnessed tornadoes on six of these chase days, and on three other chase days we were on tornadic storms but unable to see (or confirm) a tornado.  I did not chase at all this year in ND, MN, IA, and NM (though we were in ND on one evening after a Montana chase).

This page is designed to help you get a fairly quick look at what I caught (or didn’t catch) this season, and to showcase some of my photography from spring 2009.  By clicking on the thumbnails, you will be privy to an enlarged version of the image.  To check out all of the images posted for a particular day, please click on the highlighted date and title above the associated thumbnail image(s).

April 25/western OK/supercells This was the first day out after beginning the drive from L.A. the previous afternoon.  It was nice seeing some severe storms again!


April 26/High Risk/western OK quasi-bust I favored the area south of I-40 in SW OK and wound up on a brief supercell near Elmer. We missed the tornado near Roll, OK.  I did not chase on the 27th or 28th.

April 29/Motley County, TX/supercell

We were unable to make it to the Floyd County tornadoes following noon  orientation in Arlington, and wound up on impressive supercells east of the Caprock.


April 30/Custer County, OK/supercell This fun chase culminated with a lightning-illuminated  barrel-shaped updraft, just to our east.

May 1/Jones County, TX/supercell We saw the tornado near Knox City, and later photographed lightning north of Abilene.

May 5/Stephens County, TX/supercell After three slow days, we were on the big hailer that tried hard to “tornado” south of Breckenridge.

May 7/De Kalb County, MO/supercell A highly-sheared and tilted updraft was quite photogenic at sunset.

May 8/Brown County, TX/supercell A tornadic supercell blew through Brownwood, and we had an excellent look at its structure.

May 12/Hall County, TX/severe storms Fun, but somewhat disorganized and linear storms near Memphis and Childress.

May 13/Blaine County/supercell This south-moving supercell produced a damaging tornado during the late evening in Anadarko, OK.

May 15/Carroll County, MO/severe storm Convection fired early in the day and declined to go tornadic in KS and MO.

May 19/Carter County, MT/virga bomb In the midst of a poor pattern with less-than-adequate moisture, we observed high-based “convection” in southeast Montana. Yawn.

May 20/northwest Nebraska/severe storms A plethora of storms from Harrison to Hay Springs to Ashby kept us busy.

May 24/Nebraska Panhandle/outflowing high-based junk The extended period of lousy chase weather continues.

May 25/northern TX panhandle/severe storms Still short on moisture, but Panhandle Magic did what it could.

May 26/Parker County, TX/supercell This hailstorm was high-based, in late May near Fort Worth. Gulf moisture was still less than robust.

May 27/Val Verde County, TX/lightning We drove to the end of the Earth for some electric fireworks.

May 28/Sutton County, TX/storms We are still struggling through the dreadful May weather pattern, as shear and moisture are much less than ideal. These storms were entertaining, nonetheless.

June 5/Banner County, NE/tornadic supercell We didn’t quite reach Wyoming, but we were able to view the LaGrange, WY, tornado from Nebraska!

June 10/Stevens County, KS/supercell The atmosphere has its act together! Today’s supercell was a bit HP-ish, but I wasn’t complaining.

June 11/Arkansas River, CO/supercell Two fabulous supercells duked it out in southeast Colorado.

June 12/Cheyenne County, CO/high-based supercell A big Colorado hailer chased us through the empty plains of east-central Colorado.

June 13/Morgan County, CO/tornadic supercell A storm near Fort Morgan spit out a couple of small tornadoes, for our viewing pleasure.

June 14/Lincoln County, CO/supercells Eastern Colorado is once again the place for fantastic supercells!

June 15/Adams County, NE/tornadic supercell After a long drive from Lamar, CO, we reached the Hastings area in time for a great show!

June 16/Hutchinson County, SD/tornadic supercell A beast of an HP supercell chased us in southeastern SD.

June 17/Aurora, NE/tornadic supercell A long-lived tornado was photographed between Grand Island and Aurora.

June 17/York County, NE/Lightning in CB After the tornado show near Aurora, the cumulonimbus tower looked nice in the fading light.

June 18/Cheyenne County, NE/nighttime lightning A high-based High Plains electrical storm salvaged an otherwise dud chase day.

June 21/Ziebach County, SD/supercell The beautiful prairies of South Dakota in June make storm photography a blast!

June 22/Corson County, SD/high-based supercells We found ourselves on the wrong side of the Missouri River with the highway heading the wrong way.

June 23/Logan County, NE/tornadic supercell Another fabulous supercell with a shy tornado, wrapped in rain, emerges from the Sand Hills

June 24/Davison County, SD/tornadic supercell A late forecast switch led to a late-in-the-day tornado!

June 25/Jackson County, SD/high-based hailer Late afternoon storms fizzling on the Badlands are better than a sharp stick in the eye.

June 26/Deuel County, NE/supercell Supercell structure on the High Plains in June — what a show!

June 29/Box Butte County, NE/high-based supercell Another mix of pretty storms above great landscapes, without any tornado threat.

June 30/Wibaux County, MT/tornadic supercell My first Montana tornado put an exclamation point on a great month of June chases!

July 1/Carter County, MT/high-based junk Junky hailstorms and junk in an abandoned building in Capitol…why can’t it still be June?

July 2/Niobrara County, WY/supercell Local Wyoming landscape and storm structure combined to make some happy photographers.

July 3/Ottawa County, KS/briefly tornadic supercell A long drive across Nebraska paid off with a good-looking supercell at dusk in Kansas.

July 5/Sherman County, TX/severe storms I wasn’t really in chase mode, but I made sure that I didn’t miss anything important.

July 6/Bruiser in NM One last look at Plains convection before heading to perpetually stable coastal Southern California…

Posted in 2009, Chase Season Summary | No Comments »

December 16, 2009 Eureka Dunes

December 16th, 2009 by Bill

It had been perhaps a dozen years since I had visited the Eureka Valley in eastern California.  I have been here a few times in my life, and I can’t imagine ever NOT wanting to return!  Like its adjoining basins—Owens Valley, Saline Valley, Deep Springs Valley—the Eureka Valley is rimmed by spectacular mountains and is stark, desolate, dry, and wonderfully empty.  The valley contains the absolute best sand dune field in the state, if not the nation, in my opinion.  The Eureka Dunes are a photographer’s dreamland.  Yes, they are remote, but the dunes can be reached fairly easily by conventional automobiles.  My SUV had no trouble on the unpaved road into Eureka Valley and on the ten-miles from Death Valley Road to the dunes, but in places the road was a nasty washboard.

What makes the dune field so spectacular?  The dunes rise rather abruptly about 700 feet above the surrounding terrain, making them the tallest in California.  And, they are nestled close to the beautifully striated Last Chance Mountains.  There is a complete absence of anything man-made in the area, save for the road, a few small signs, and a port-a-potty.  People are also in short-supply.  I would be surprised if there are any full-time residents in the Eureka Valley.  I saw about four folks during my five-hour visit — two in a car leaving the dunes, and two walking on the dunes.

Entering Eureka Valley

I entered the basin on its west side via Death Valley Road.  It was about 3 p.m., so I couldn’t dawdle too much, as I wanted to give myself at least an hour or so at the dunes prior to sunset.  The first three images below are from the west side of Eureka Valley, looking northeast towards the Sylvania Mountains, and then southeast towards the sand dune field, about 20 miles distant.  The final three are from the junction of Death Valley Road and the side road that heads to the dune field:  northeast to Horse Thief Canyon and the Sylvania Range, and southeast down the road towards the Last Chance Range.

091216_0812_eureka_vly_ca091216_0814_eureka_vly_ca091216_0816_eureka_vly_ca091216_0818_eureka_vly_ca091216_0821_eureka_vly_ca091216_0824_eureka_vly_ca

Approaching The Dunes

The road to the dunes is pretty bad—ten miles of bad washboard and not-so-bad washboard.  It seems that with every mile I am compelled to stop and take pictures.
091216_0826_eureka_vly_ca091216_0828_eureka_vly_ca091216_0829_eureka_vly_ca091216_0832_eureka_vly_ca091216_0843_eureka_vly_ca
On The Dunes
There was a couple of folks traipsing up the nearest sand dune when I parked and headed for the highest dune.  Fortunately, they stayed out of my way!  I made it to the top of a dune with a beautiful view of the entire basin.  There was a slightly higher dune to the south, but the sun was about to set and I needed to take pictures.

Apparently the last seven images below are not opening up in the proper fashion.  You, the web surfer, are going to have to  make the necessary adjustments.  Good luck.

091216_0844_eureka_vly_ca091216_0849_eureka_vly_ca091216_0853_eureka_vly_ca091216_0855_eureka_vly_ca091216_0856_eureka_vly_ca

Posted in 2009, Desert, Landscapes | No Comments »

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