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Next severe weather event April 26-29


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Here is Dr. Forbes's tor:con for Wednesday.

Forecast for Wednesday, April 27

AL north - 7

AL south - 5

FL west panhandle - 3 to 4

FL east panhandle - 3 to 4 night

GA north - 5

GA west-central - 4

GA south and east-central - 3 to 4 night

SC west - 4

SC central and east - 3 to 4 night

TN middle - 7

TN west - 4 to 5

TN east - 5 to 6

MS west and north - 4

MS southeast - 5

NC west - 4

NC central - 3 to 4 night

KY east - 6

KY west - 4

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Here is Dr. Forbes's tor:con for Wednesday.

Forecast for Wednesday, April 27

AL north - 7

AL south - 5

FL west panhandle - 3 to 4

FL east panhandle - 3 to 4 night

GA north - 5

GA west-central - 4

GA south and east-central - 3 to 4 night

SC west - 4

SC central and east - 3 to 4 night

TN middle - 7

TN west - 4 to 5

TN east - 5 to 6

MS west and north - 4

MS southeast - 5

NC west - 4

NC central - 3 to 4 night

KY east - 6

KY west - 4

I really hope a lot of people along the Appalachians do not sleep on the fact of just how dynamic this storm is going to be. I know a lot of times we look at the timing in regards to the severe weather...I don't have a good feeling for those in Georgia, East Tennessee and the Western Carolina's for Wednesday Night. If we get any long track tornadoes to develop over Alabama or Middle Tennessee, then I could see them translating pretty far to the east during the evening hours. Where timing benefits us is in regards to re-development...which I think would be limited during the overnight. So going into the day Wednesday, the extent of development just to our west will determine just how bad it gets.

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In all the years I've followed weather, this is about the most concernec I've ever been about a tornado outbreak for the TENN Valley. I'm talking about Wednesday for that region. The dynamics are extreme, so nature will respond by many funnel touchdowns, I have no doubt about that, and several of these are likely going to be EF3 or greater. The 200mb jet splits right over the region abruptly by midday, the 5H sends a powerful vort down that rounds the bend and enhances lift to the absolute maximum, so the shear is going to be phenomenal. Look at the water vapor currently for the last 8 hours and see how things evolved today in TX, OK and ARK just to get an example of the explosive development, and the Wed. outbreak should be stronger. There will initially be a raincooled zone from extreme northern TN and southern KY, but just south of there in MEM to TUP region and eastern ARK the outbreak should begin quickly on Wednesday, then that line really takes shape and stretches more north to south, sweeping across northern MS, central AL to central TN, then toward the east to the APPS by dark. I'm still not leaning either way after dark as to what happens with the line, some runs keep it strong and the dynamics shift far enough east to keep it going, others are weakening since the energy lifts too far north and west, then perhaps re-develops over the Carolinas early Thursday. We can nail that down more tomorrow, but the arrows all point to the TENN Valley for certain as for a memorable outbreak. I hope those folks are prepared, this looks about as bad as it gets to me (but severe isn't my expertise).

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Great AFD from BMX: Still say some things need to be answered, but they think supercells/tornadoes and possible long-tracking ones, will be possible before they get forced into a line, but still mention that the line may have broken cells along it which would keep tornado threat high.

LOOKING AHEAD TO WEDNESDAY...SOME OF THE SYNOPTIC PARAMETERS ARE

LOOKING DOWNRIGHT DANGEROUS. HOWEVER...I AM STILL ON THE HESITANT

SIDE AS I WOULD WANT TO WAIT TO SEE HOW EXACTLY THE MESOSCALE

PLAYS OUT LATE TUESDAY. IF THINGS GO ACCORDING TO THE NUMERICAL

OUTPUT...THE CAP SHOULD CONTINUE TO GROW AND DEVELOP DURING THE

EARLY MORNING HOURS...WHILE ENERGY BEGINS TO BUILD AS BREAKS OF SUN

HEAT THE SURFACE THROUGH MUCH OF THE MORNING AND EARLY AFTERNOON

HOURS. CAPE VALUES ARE SIGNIFICANT AS THEY LOOK TO RANGE ANYWHERE

FROM 1000 TO 3000 J/KG. THE CAP IS RATHER WEAK AND CONTINUES TO

TREND WEAKER WITH TIME SUGGESTING THAT IT WILL EASILY BE BROKEN

BETWEEN 1 AND 3 PM. THAT IS ABOUT THE SAME TIME THAT THE JET MAX

BEGINS TO NUDGE IN FROM THE WEST...OR AS THE 0 TO 6 KM AND THE 0

TO 8 KM BULK SHEAR VECTORS INCREASE TO GREATER THAN 60 KTS...AND

MORE IMPORTANTLY THEIR ANGLE OF ATTACK SUGGESTS SUPERCELLS AND

LONG-LIVED ONES AT THAT. MY FINAL QUESTIONS SURROUND THIS LOWEST

SHEAR LAYER FROM 0 TO 1 KM. SYNOPTICALLY...WOULD LIKE TO SEE MORE

CONSISTENCY BETWEEN MODELS AND INDIVIDUAL RUNS ON EXACTLY HOW MUCH

VEERING WITH HEIGHT WILL EXIST. THIS IS DIRECTLY RELATED TO THE

MESSY SURFACE PRESSURE FROM THE DOUBLE HELIX LOW AND FROM VARYING

DEGREES OF THE STRENGTH OF THE LOW. ADD TO THAT...EVEN MORE

UNCERTAINTY OF WHETHER THIS FRONT BEGINS TO GO LINEAR. OVER THE

PAST SEVERAL FORECASTS...WAS THINKING THAT WE START SUPERCELLS

THROUGH MUCH OF THE AFTERNOON AND EARLY EVENING ONLY TO TRANSITION

LINEAR AFTER SUNSET...BUT A RE-EXAMINATION OF THE VECTOR ANGLES

SHOWS THAT IT MAY NOT HAPPEN UNTIL FURTHER EAST INTO GA AND NORTH

FL. SO...WHILE IT MAY BE A LINE...IT MAY ACTUALLY BE A BROKEN OR

MORE CELLULAR LINE AS THE EVENT TRANSLATES EAST OF I65.

REGARDLESS...MY BEST FORECAST IS THAT THE GREATEST OPPORTUNITY FOR

SUPERCELLS AND TORNADOES WILL LIKELY BE ALONG AND WEST OF I65

FROM 1 UNTIL 6 PM WEDNESDAY.

PLEASE STAY TUNED TO THE WEATHER EVENTS THROUGH WEDNESDAY EVENING. THIS

IS A DANGEROUS SITUATION THAT WARRANTS ATTENTION. DO WHATEVER IS

NECESSARY TO PROTECT LIFE AND PROPERTY...NOW IS THE TIME TO REVIEW

SAFETY RULES AND PLANS AS IT MAY SAVE YOUR LIFE!

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Seems this year all the tornados wanna hit big towns and population centers, the live feeds from Little Rock are insane lots of reports of a touchdown in N Little Rock right near the NWS office.

Also the one above has been confirmed as a large wedge and several small towns have been hit and damage reports are coming in quick.....

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I'm surprised this place is so quiet tonight. Over on Talkweather they are talking like crazy about what's going in Arkansas. It seems like this forum doesn't get as excited about severe weather unless it's actually happening in the Carolinas.

Well most of us arent in Ark that said lots of us do track them but we have a central/western forum where we are all at and this is being discussed.....

http://www.americanwx.com/bb/index.php/topic/17617-monday-april-25th/page__st__120

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Damn, don't get much stronger wording than this with an emergency...

...TORNADO EMERGENCY FOR ROMANCE...

AT 738 PM CDT...STORM SPOTTERS AND NATIONAL WEATHER SERVICE

METEOROLOGISTS WERE TRACKING A CONFIRMED TORNADO WITH REPORTS OF

DAMAGE. THIS POTENTIALLY DEADLY TORNADO WAS LOCATED 3 MILES

SOUTHEAST OF MT VERNON...OR 16 MILES NORTH OF CABOT...MOVING

NORTHEAST AT 50 MPH.

* LOCATIONS IN OR NEAR THE PATH OF THIS TORNADO INCLUDE...

SEARCY... VILONIA... ROSE BUD...

MT VERNON... HIGGINSON... GRAVEL HILL...

ENOLA... CROSBY... SIDON...

ROMANCE... OTTO... LETONA...

JOY... FLOYD... EL PASO...

CENTER HILL... ARMSTRONG SPRINGS... ALBION...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A VIOLENT...WEDGE TORNADO IS ON THE GROUND. THIS IS AN

EXCEPTIONALLY DANGEROUS SITUATION. THIS STORM IS PRODUCING A LIFE

THREATENING...CONFIRMED TORNADO CAPABLE OF SIGNIFICANT DESTRUCTION!

TAKE COVER IMMEDIATELY!

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Saw this posted on TW:

Here is the threats for Central Alabama from BMX: I their afternoon breifing they mentioned about moving their tornado/wind to extreme.

image_full6.gif

BMX's briefing.

I wouldn't be surprised to see it upgraded to a "High Risk" by tomorrow afternoon. The greatest tornado threat will be the Birmingham region, i.e. "Central Alabama" on north. Considering the history of this storm system, North Georgia shouldn't rest on their laurel at all about it being an overnight threat. I'm expecting people whom are in the West Georgia counties to be on alert starting Tuesday night until early Thursday morning. Metro Atlanta did see some damage from the last storm system about 2 Fridays ago, so it might be a repeat episode...

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Besides downed trees, a lot of roofs are apparently flying off of everyone's houses and business buildings over there. Scary stuff. My prayers are going for the folks affected right now to be safe. I'm beginning to wonder why a high risk wasn't placed over there. A system like this poses too much of a threat to not at least consider an upgrade.

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Besides downed trees, a lot of roofs are apparently flying off of everyone's houses and business buildings over there. Scary stuff. My prayers are going for the folks affected right now to be safe. I'm beginning to wonder why a high risk wasn't placed over there. A system like this poses too much of a threat to not at least consider an upgrade.

They did have PDS TWs up hours in advance, I wouldn't say the threat was not anticipated.

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