Wednesday, November 02, 2011

White dust in El Paso, Texas, coming from White Sands, New Mexico - Nov/2/2011

Dear reader, I ran my super (maybe not so) smart algorithm to detect dust aerosols, I got some information, but I got other stuff that is a little confusing, so I need some of your input. Here is the story as reported by the US Weather service...
"It is a dusty day across El Paso -- especially east of the Franklin Mountains. Gusty north winds have lofted gypsum from White Sands National Monument, and the plume has spread south down the Tularosa Basin. The plume can be seen in Visible Satellite..."
This is the information I got from the web...
1) Aline Jaime's facebook photo (a friend of a friend)
2) Then, this from the US National Wheather Service for El Paso
https://www.facebook.com/US.NationalWeatherService.ElPaso.gov
3) The "true color" image from NASA - Terra - MODIS data at 1740 UTC
4) This the output of my algorithm to detect dust aerosols (soon to be fully published if my advisor is happy with the text):
5) Other view of the event using Hao's aerosol index:
QUESTIONS for the courageous reader:
a) Assume that the "white" area circled on the center is the reported event in White Sands, NM and El Paso, TX. What is that thing on the right? It looks like a wave of dust, but I didn't hear any reports. That area corresponds to Midland, TX, and Odesa, TX.
b) What is that on the left, right in south California? Did anyone reported any dust in California?
-----------Update Nov/3/2011----------
Recent reports show that there was "dusty" activity on the areas of Midland Texas as confirmed by the following NASA GOES videos. It seems like some sort of wave from north to south. Click play to see the Infra-Red GOES West and East data animation.
-------Update Nov/4/2011 ------------
The following is additional information that can be found on the internet.
All these information confirms a Haboob in the Midland - Odesa, TX, area.
"If you go to the RAMSDIS LW difference page found on:
http://rammb.cira.colostate.edu/ramsdis/online/sounder.asp
and choose the "archive" from both the East and West, you can see the
event in West Texas quite clearly.  Because of the poor resolution of the
sounder, the much smaller White Sands event is not so clear.  That "event" in the top of the Sea of Cortez is a feature that quite often shows up; but, because I almost never see any "plume" development, I think that it must be an artifact of the underlying surface or just a lot of "haze" as that is just below the Imperial Valley, Mexicali, and Yuma agricultural region.  On that day, we had dust in the Mesilla Valley but it was not too thick and does not show up well in the LW difference imagery -- LW difference from either MODIS or AVHRR might show it better (as well as these other events)." - M. P. Bleiweiss








 This was taken from a plane, unknown author, yet.

A YouTube video of a concerned citizen on the Odesa - Midland, TX, area.
This video confirms the observation on the ground.

What is a Haboob anyway, and what's the difference between it and a dust storm?
Well, in case you were wondering, here is what an expert on the area answered when asked this question.
"All haboobs are dust storms, but not all dust storms are haboobs. Sort of like the saying that the Eskimos have thirteen different words for snow. And some old-timers I met up in the Panhandle differentiate between a "twister" and a "tornado."
A haboob is a stark, well-defined, cloud of dust, advancing as a wall- like an avalanche coming down a snowy slope or an oncoming flash flood (or like when you spill your coffee on a table top and a wave of liquid flows out), a massive wave of oncoming dust, where the dust is confined to a dense layer of onrushing air near the ground. Contrast to the "garden variety" dust storm where the dust rises up from the ground over a large area and it just gets hazier and hazier and the dust sort of thins out steadily as you go upwards in the air, without the discrete, stark "wall" of dust.
Nowadays, the haboob-type dust storms are usually caused by turbulent downdrafts spreading away from thunderstorms (those ones in Phoenix this past summer were that type). They are dramatic, but relatively small in size. Haboob-type "walls" of dust associated with the typical cold-season dry cold fronts spreading down the Plains had been almost unheard of for at least 20-25 years, until the last few weeks... BUT this type of "non-thunderstorm haboob" is EXACTLY the class of dust storm that was so prevalent during the Dust Bowl days of the 1930s. I'm not sure exactly what that means... but it can't be good. (Perhaps not surprising though, given that much of west Texas is in a drought WORSE than that of the 1930s)." - Dr. Thomas Gill

2 comments:

Web Designer Developers said...

Good helping one stuff defined.
Nice one sharing thanks

Anonymous said...

I remember this storm, as I had just mailed a letter and was returning to work at lunch time. I turned north and saw what looked like had been where a truck had sped down a dirt road at a 90 degree angle to the highway. The cloud of dust then began growing and growing instead of diminishing. It was impressive and spooky.