rdale
EF5
Look at 1.4* tilt in the meantime. Many problems with DYX with bad scans / way too high reflect values on occasion / etc. Notice the storm yet they are running in "general precip" mode vs a severe weather mode!
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4/23/07 NOW: CO/KS/OK/TX
- Thread starter Mark Farnik
- Start date
Look at 1.4* tilt in the meantime. Many problems with DYX with bad scans / way too high reflect values on occasion / etc. Notice the storm yet they are running in "general precip" mode vs a severe weather mode!
Bill Tabor
EF5
Looks like Dyess radar is down again this scan. Wonder if problems with Noaaport?
Not a good time to act up with the storm bearing down.
Not a good time to act up with the storm bearing down.
rdale
EF5
Dyess is working - as I mentioned partial 0.5* scans are coming through, the higher elevations are complete. Level II data is not transmitted by NOAAPORT in the first place.
Jarrod Cook
EF2
Doesn't surprise me they didn't put the radar in severe weather mode considering the products that have come out of their office/surrounding offices tonight
Bill Tabor
EF5
Ok Dale, -will check the next level scan slice.
Bill Tabor
EF5
What caused the failure the other night (21st) in Threatnet and NWS weather page radar when some of the stations were lost? That data wasn't part of NOAAPORT? I heard it had been down - therefore I assumed it was the cause. Enlighten me.
rdale
EF5
Never forget the FTM (Free Text Messages) when you look at radar data which seems funny:
FTMDYX
Message Date: Apr 23 2007 15:21:26
JUST A REMINDER...THE DYESS AFB WSR-88D (KDYX) REMAINS OPERATIONAL...HOWEVER DAT
A REMAIN DEGRADED WITH MISSING RADIALS. WE CONTINUE TO URGE EVERYONE TO USE KDYX
DATA CAUTIOUSLY. THE DYESS AFB RADAR TECHNICIANS ANTICIPATE THE REPLACEMENT FRE
QUENCY GENERATOR WILL ARRIVE SOMETIME TODAY. THANK YOU FOR YOUR CONTINUED PATIEN
CE. 23/HUBER
Later messages indicate the replacement failed when installed so the problems will persist until the next one comes in.
The data loss the other night was part of NOAAPORT. Level II data was not impacted and EMWIN still was sending warnings just fine.
FTMDYX
Message Date: Apr 23 2007 15:21:26
JUST A REMINDER...THE DYESS AFB WSR-88D (KDYX) REMAINS OPERATIONAL...HOWEVER DAT
A REMAIN DEGRADED WITH MISSING RADIALS. WE CONTINUE TO URGE EVERYONE TO USE KDYX
DATA CAUTIOUSLY. THE DYESS AFB RADAR TECHNICIANS ANTICIPATE THE REPLACEMENT FRE
QUENCY GENERATOR WILL ARRIVE SOMETIME TODAY. THANK YOU FOR YOUR CONTINUED PATIEN
CE. 23/HUBER
Later messages indicate the replacement failed when installed so the problems will persist until the next one comes in.
The data loss the other night was part of NOAAPORT. Level II data was not impacted and EMWIN still was sending warnings just fine.
Jim Zandonai
That hook looks like it passed just east of Brewster KS..was a classic hook earlier..the rotation in it was impressive as expected..Good thing it doesnt seem to be going for highly populated areas..wouldnt mind seeing of grlevel2 analyst scans on that..
The cell around Ft. Morgan CO had very impressive rotation but seemed to lack the classic hook..
The cell around Ft. Morgan CO had very impressive rotation but seemed to lack the classic hook..
Bill Tabor
EF5
Ok, that's why I thought it might be Noaaport since the other night the entire scan seemed missing as well. Actually I did look at the FTM, but for some reason only saw the tail end of that message repeated & it didn't make much sense.
Justin E. Reed
EF3
It appears the Colorado City/Sweetwater cell is finally meeting its demise. It had a good run, now the focus is shifting the storm that started as a cluster of storms. They molted together, forming this supercell with an excellent hook. This will probably be the last large supercell in TX until later tomorrow in my eyes.
Terry Tyler
EF5
just look at that SRV couplet west of st francis...on SRV 1 you can see 3 couplets just sittin there in the region, complete with 3 hooks...i wouldent be surprised to see torns with all of them...obviously a very serious situation
Jim Zandonai
I see that.. 3 Excellent hooks..very dangerous especially at this time of nite..interesting to see what reports come out on Tue..
John Peters
EF3
All three storms have also taken on very HP characteristics, so any tornadoes they produce are likely going to be rain wrapped. Very dangerous situation indeed.
Jenn Brindley
EF1
I got a text from Tony about 8:20pm that he and Jon V got a tornado near Coldwater, KS - what a day!
Bob Schafer
EF5
Disclaimer: this is a WAG. It seems to me that a lot of storms don't produce on days like today because their storm motion is too slow. The "Pampa" storm today was a slow mover. It's not just the lack of SRH that can result from slow storm motion.
I can't come up with a good analogy, so I offer a crappy one:
Picture a boat moving over water slowly. The wake it creates spreads out behind the boat at a wide, or obtuse, angle. A boat speeding along the water leaves a wake with an acute angle. In fact, the slow boat pushes the water ahead of it a bit; the fast boat does not. Well, much less so.
Same thing with a storm, sort of. All thunderstorms will generate a low pressure area near their base as the updraft does its thing. That explains non-synoptic strong inflow winds near the RFB. A fast mover will leave a "wake" of low pressure behind it (*boat analogy*) , and as a bonus to the fast-moving storm, ingests PBL more readily as it clips along at its brisk pace.
Here's another ridiculous analogy to illustrate that: Lets say you have a vaccuum cleaner that ingests air at 30mph. It creates a vaccuum *duh* at the end of the hose. Well, what if you got in your car and drove at 30 mph holding the hose facing forward out the window with it turned on? Would there still be an area of low pressure created at the hose's opening? Of course not. Drive at 60mph, and there would actually be high pressure there relative to the ambient air, as the onrushing air would be blocked by the hose, even though the vaccuum cleaner was running.
A fast moving storm is like that hose held out the window. It gets fed lots of air. Sort of turbocharged.
Back to the boat wake: A fast moving storm creates little low pressure area in front of it. The low pressure wake is left behind more. It would be oval/elongated in shape, with most of the oval trailing the storm. A slow moving storm creates a rounder low around it, with the leading edge a greater distance in advance of the storm.
A storm struggling to mature can be choked by slow storm motion in this way. We saw the Pampa storm pulse as the updraft would first suffocate from low pressure at 360 degrees surrounding its base, then regenerate after the updraft weakened, which allowed synoptic/meso inflow to resume, and over and over until the updraft died on a cycle of storm-fatal inflow suffocation.
*edit I guess I should have waited for the "4-23 DISC thread...."
