• After witnessing the continued decrease of involvement in the SpotterNetwork staff in serving SN members with troubleshooting issues recently, I have unilaterally decided to terminate the relationship between SpotterNetwork's support and Stormtrack. I have witnessed multiple users unable to receive support weeks after initiating help threads on the forum. I find this lack of response from SpotterNetwork officials disappointing and a failure to hold up their end of the agreement that was made years ago, before I took over management of this site. In my opinion, having Stormtrack users sit and wait for so long to receive help on SpotterNetwork issues on the Stormtrack forums reflects poorly not only on SpotterNetwork, but on Stormtrack and (by association) me as well. Since the issue has not been satisfactorily addressed, I no longer wish for the Stormtrack forum to be associated with SpotterNetwork.

    I apologize to those who continue to have issues with the service and continue to see their issues left unaddressed. Please understand that the connection between ST and SN was put in place long before I had any say over it. But now that I am the "captain of this ship," it is within my right (nay, duty) to make adjustments as I see necessary. Ending this relationship is such an adjustment.

    For those who continue to need help, I recommend navigating a web browswer to SpotterNetwork's About page, and seeking the individuals listed on that page for all further inquiries about SpotterNetwork.

    From this moment forward, the SpotterNetwork sub-forum has been hidden/deleted and there will be no assurance that any SpotterNetwork issues brought up in any of Stormtrack's other sub-forums will be addressed. Do not rely on Stormtrack for help with SpotterNetwork issues.

    Sincerely, Jeff D.

1/7/08 FCST: IA, IL, WI, MN, TX, OK, MO, LA, AR

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Kick off for 2008 :)? As hopefully suggested in W&C, ingredients look promising for severe with good shear and moisture. Wild card is sufficient low level focusing ahead of the cold front, I think. Difficult chasing with short daylight and fast-moving cells, at best.
 
It has been interesting to watch the models play with this system, changing features every run..

Sadly, I think that the most prominent/widespread activity will be in the southern part of the CONUS probably from IL southward, which has been outlined in the SPC 4-8 day. Where models continue to show higher CAPE values, and increased moisture, but will certainly bear watching over a large area..

I think TX/OK/MO/LA/AR should be added to the thread..
 
Still in the wishcasting phase...at six days out, I don't really have a lot of confidence in pinning down a forecast, but based on the 12Z GFS, I'm seeing precip developing east of I-35 in the afternoon time frame Monday, and as the cold front catches up, developes into a fast moving squall line. If there's going to be anything chaseable, I'd look at the NE OK, SE KS, SW MO, NW AR area for isolated cells that may develop in the 21-23Z time frame.
Anybody know where to find some models for CAPE? COD hasn't updated since the 12Z run on Monday.
 
Still in the wishcasting phase...at six days out, I don't really have a lot of confidence in pinning down a forecast, but based on the 12Z GFS, I'm seeing precip developing east of I-35 in the afternoon time frame Monday, and as the cold front catches up, developes into a fast moving squall line. If there's going to be anything chaseable, I'd look at the NE OK, SE KS, SW MO, NW AR area for isolated cells that may develop in the 21-23Z time frame.
Anybody know where to find some models for CAPE? COD hasn't updated since the 12Z run on Monday.
The OU School of Meteorology has good graphics for the NAM and GFS, including CAPE, that normally update very quickly: http://hoot.metr.ou.edu/new_model_data_page.htm

Can't guarantee you're going to like what you see in this instance, though. ;)
 
Thanks, Brett! :)
Yep, that looks even worse than the run did Monday :rolleyes:. We've still got 6 days for this to either shape up or totally go away...not holding my breath on it ;).
 
0z GFS really took the system on a more Southerly track, taking it right over IL at 996 mb.. It still appears that thunderstorms will be possible over IL southward. With strong instability over TX/LA/AR..

Also of concern, especially in IL, is the QPF amounts, the heavy forecast precip, along with ongoing snow melt, could cause some major flooding issues...

gfsp60168lwn0.gif
 
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Yeah. :( I've given up on the MN chase idea and am leaving the chase stuff at home, but packing the winter stuff. And the best action is now later -- the 8th and 9th. Someone else with SDS can start those threads.... :rolleyes:
 
REMINDER

As a pre-emptive word of caution, the moderators would like to remind everyone that the Target Area is moderated considerably more strictly than the other subforums on Stormtrack. Since this is the first system for severe potential of 2008 it seems like a good time to remind all our old members, and especially our new members that it is doubly important that all members understand the special rules and act to comply before posting. We have noted a few posts in this thread violating target area rules already.

If you are not entirely familiar with this special rules, please re-read the following:
SPECIAL RULES: Mandatory reading

THANKS! :)
 
David you scared everyone away! :D

This thread seems to have died.. The SPC's outlined area has not changed any... at all....notta.... lol...

Todays 12z GFS has the front through IL by Tuesday Night, 0z Wed. The system track has actually seemed to become more consistent, Tracking from the Texas Panhandle, through Northeast Oklahoma, then over SouthWest IA and NorthWest MO into Central IA. The system deepens to 989 by the time it reaches Northeast Wisconsin. The best instability lies over Southeast Texas, where forecast soundings from KACT (Waco) show nice CAPE in the order of 850 J/KG. Shear is more directional, than of the speed variety.. Also in this area, the LI's dip the lowest...

Welp, that's all I can add. Im on the west coast, getting slammed by this storm.. And power is about to go out, so I better post before I lose my WiFi!:D
 
And so we move into the time of year with those beloved, fast-moving, CAPE-starved systems that are the temptresses of every chaser out there! :D For one - I'm just glad to see that our temps will be approaching 70 on Sunday......that's sure a nice shot in the arm for us and will bring us out of the deep freeze yet again (OK not much of a deep freeze compared to anybody in IL or further north......but I'm already sick of winter LOL!).

According to the GFS (I am fully ignoring the ETA these days), overnight Saturday a great deal of energy crashes ashore and as a result a trough begins to develop over the wrn US. As with most systems at this time of year, this one has great, FAST upper level winds and will likely be CAPE-starved. Unfortunately for chase-prospects, it appears that this system will be mis-timed if the GFS holds true, kicking the bulk of the energy out between 00Z Jan 8th and 12Z Jan 8th. The area with the best connection to any Gulf moisture will likely be NE TX although a stout return-flow makes a good attempt at getting this moisture a little bit further north during Sunday and Monday.

Chances for good, chaseable supercells remain to be seen although with this much energy aloft and at least an attempt at halfway decent moisture in southern reaches of the risk area, it certainly isn't out of the question that a supercell or two and a tornado or two could happen somewhere under the cover of darkness and behind a few hills. ;)

KL
 
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I would never underestimate the power of low cape in winter. Last February I was on a storm that produced an EF-4 wedge with 500 j/kg of cape in the area. The GFS is showing tds to be around 60F across E Oklahoma, that along with CAPE values around 1000-1500 j/kg and the great shear profiles I have a feeling that the setup could be decent. That with the cold temps aloft make me believe that we will see good destabilization. Who knows, I'm just not ruling it out especially since last winter's tornadoes.
 
Hmm..

6z GFS- Interesting to see a 500 J/KG CAPE Maxima over KIRK (Kirksville) at 18z.. Also, this run looks somewhat less organized, or maybe weaker in comparison with previous runs.. BUT- That doesn't stop the NAM from indicating 250-700 CAPE Values (In J/KG) all the way up through West Central IL.. Taking a look at some kinematic fields. Looks like effective shear will be rather high, around 40+ Kts. Effective Helicity Values Hover around 350 also in MO/IL... Cant wait to see 12z
 
Man... NAM continues to be impressing with the amount of CAPE in the IL area, with 700-1200 J/KG Common south of I-80.. Boundary Level Wind Shear of 55-60 KTS of shear, and 0-3 KM shear at 50 KTS across IL.. I hope it's not, but it wouldn't surprise me to see the NAM overdoing this a tad, the GFS doesn't quite pick up on this much instability, but it does indicate 400-500 J/KG of CAPE across west central IL. Also, helicity values still impressive, with a couple bulls eyes of 500 m2/s2.. One Final Note: NAM Potential Hail Size Forecast indicate .5 inches or greater over all of IL except for an area of 1.00 inch hail probs. across south central IL, and another area of 1.00 inch over TX and OK..

I cant wait to see more model runs, and wait till the system gets on shore, to get better data sampling, to help the models out.. But they have really been picking up the intensity on this one since 18z yesterday!
 
Well somebody has to come in on this and reassure Brandon that he's not the Last Chaser on The Face of the Earth, I guess! ;) My analysis won't be my best (not that my best's ever up to much anyhow) due to the late hour, but......

Am confident that Tornado Watch #1 will be issued sometime during the day on Day 3 (Mon, Jan. 7th). It's always a nice moment when that happens...

Due to cold temps aloft and great helicity, the ETA does tend to pick up on traces of CAPE in the IL area on Monday and there is indeed a bona-fide risk for severe wx in these areas Monday. It's not unusual for 500-1,000j/kg of CAPE to get the job done in spectacular fashion and - if it's going to - this is the time of year.

I still do however feel that the more significant risk of severe wx will be seen from NErn TX, throughout most of AR, and into MO. The activity will likely start in Ern OK and NErn TX, and translate NEwds with time and overngiht onwards from 0Z Tues. The ETA tries to develop a glob of 1,500 CAPE in NErn TX by 0Z and it is entirely possible for this greater moisture to translate northeast with the system into centrl AR overnight. With the LLJ likely ramping up overnight and the upper trough looking progged to truly kick-out overnight Mon-Tues, the stage looks set for what could certainly be an interesting night for chasers and spotters who decide to venture into the Ozarks and Arklatex after dark.

I really am just enjoying seeing a highly dynamic system come onshore and I can't wait until it is sampled proper. Temperatues approaching the 70s will be seen in MY area over tomorrow and Monday, and during the day today - although the ground was still radiating freezing cold temperatures - the sky above was magnificent to behold as thick, fluffy, grey, foggy stratocu raced northeastwards, spurred on it's course by our amazing return flow. Occasionally, there'd be a tiny break in the clouds, a small scar of blue amidst the grey, and sun would strafe the hillside here in Conway. Beautiful. Brandon - I cooked up a nice batch of steamy Gulf moisture and it's on it's way to ya! :D

It's not unusual for severe wx threat threads that fall outside of classic chase territory (especially AR - which is a Leper as far as chasers seem to be concerned, for some reason), and happen overnight, to be somewhat downplayed or ignored - and for sure I will not be chasing as I have to work on Monday (although if the evening is exciting I will be right here with it looking for at least good lightning shots!), so I'm not that surprised that the first severe/tornado threat of 2008 looks like it will likely pass without much fanfare. I am confident, regardless, that several interesting storms producing some interesting toandoes will occur overnight Monday night somewhere in the NE TX/Arklatex/AR/SRn MO area.

KL
 
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