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Monday Feb 28 Severe Weather Threat


Cheeznado

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For KATL. 15Z RUC has SBCape ~470 J/KG with 0-1KM Helicity ~280 (20m/s) with 0-3KM helicity ~450 (37 ms/s) by 2-3PM. LI drop to -3 decreasing to -5 by 6pm with ~570 J/KG SBCAPE with 0-1KM helicity increasing over 300 (21 m/s). EHI over 1 for good amount of time as well with mid-level lapse rates over 8.0 C.

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Things seem to be intensifying in Southern TN:

SEVERE WEATHER STATEMENT

NATIONAL WEATHER SERVICE HUNTSVILLE AL

1225 PM CST MON FEB 28 2011

TNC051-127-281830-

/O.CON.KHUN.TO.W.0013.000000T0000Z-110228T1830Z/

MOORE TN-FRANKLIN TN-

1225 PM CST MON FEB 28 2011

...A TORNADO EMERGENCY IS IN EFFECT UNTIL 1230 PM CST FOR

NORTHWESTERN FRANKLIN AND MOORE COUNTIES...

AT 1220 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO

INDICATE A POTENTIALLY DESTRUCTIVE TORNADO. THIS TORNADO WAS

LOCATED JUST EAST OF LYNCHBURG...MOVING EAST AT 55 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO OAK

GROVE...ESTILL SPRINGS AND WOODS RESERVOIR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS AN EXTREMELY DANGEROUS AND LIFE THREATENING SITUATION. THIS

STORM IS CAPABLE OF PRODUCING STRONG TO VIOLENT TORNADOES. IF YOU ARE

IN THE PATH OF THIS TORNADO...TAKE COVER IMMEDIATELY!

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 PM CST MONDAY AFTERNOON

FOR NORTHERN ALABAMA AND CENTRAL TENNESSEE.

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With that batch firing up across southern Alabama and Most Unstable Lifted Indices checking at least -4 for most of Alabama... I'm going to look for this line across West Alabama to REALLY fire up here in the next few hours... It will get pretty gusty and wouldn't rule out the possibility of a tornado or two.

Tornado Watch in effect as I type!

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TORNADO WATCH OUTLINE UPDATE FOR WT 33

NWS STORM PREDICTION CENTER NORMAN OK

130 PM EST MON FEB 28 2011

TORNADO WATCH 33 IS IN EFFECT UNTIL 800 PM EST FOR THE

FOLLOWING LOCATIONS

GAC011-013-015-045-047-055-057-059-063-067-077-083-085-089-097-

111-113-115-117-119-121-123-129-135-137-139-143-145-147-149-151-

157-187-195-199-213-217-219-223-227-231-233-241-247-255-257-281-

285-291-295-297-311-313-010100-

/O.NEW.KWNS.TO.A.0033.110228T1830Z-110301T0100Z/

GA

. GEORGIA COUNTIES INCLUDED ARE

BANKS BARROW BARTOW

CARROLL CATOOSA CHATTOOGA

CHEROKEE CLARKE CLAYTON

COBB COWETA DADE

DAWSON DEKALB DOUGLAS

FANNIN FAYETTE FLOYD

FORSYTH FRANKLIN FULTON

GILMER GORDON GWINNETT

HABERSHAM HALL HARALSON

HARRIS HART HEARD

HENRY JACKSON LUMPKIN

MADISON MERIWETHER MURRAY

NEWTON OCONEE PAULDING

PICKENS PIKE POLK

RABUN ROCKDALE SPALDING

STEPHENS TOWNS TROUP

UNION WALKER WALTON

WHITE WHITFIELD

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Tornado Emergency:

BULLETIN - EAS ACTIVATION REQUESTED

TORNADO WARNING

NATIONAL WEATHER SERVICE HUNTSVILLE AL

1227 PM CST MON FEB 28 2011

THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A

* TORNADO WARNING FOR...

NORTHERN FRANKLIN COUNTY IN TENNESSEE...

EASTERN MOORE COUNTY IN TENNESSEE...

* UNTIL 1245 PM CST

* AT 1225 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A

SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR OAK

GROVE...OR ABOUT 8 MILES EAST OF LYNCHBURG...MOVING EAST AT 50

MPH. THIS IS A TORNADO EMERGENCY!!

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

WOODS RESERVOIR.

ALTO.

ESTILL SPRINGS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS AN EXTREMELY DANGEROUS AND LIFE THREATENING SITUATION. THIS

STORM IS CAPABLE OF PRODUCING STRONG TO VIOLENT TORNADOES. IF YOU ARE

IN THE PATH OF THIS TORNADO...TAKE COVER IMMEDIATELY!

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 PM CST MONDAY AFTERNOON

FOR NORTHERN ALABAMA AND CENTRAL TENNESSEE.

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Probs for Watch

Tornadoes

Probability of 2 or more tornadoes

High (70%)

Probability of 1 or more strong (F2-F5) tornadoes

Mod (30%)

Wind

Probability of 10 or more severe wind events

Mod (60%)

Probability of 1 or more wind events > 65 knots

Mod (30%)

Hail

Probability of 10 or more severe hail events

Mod (40%)

Probability of 1 or more hailstones > 2 inches

Low (20%)

Combined Severe Hail/Wind

Probability of 6 or more combined severe hail/wind events

High (>95%)

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Tornado Watch coming out for good chunk of N AL/GA into TN West SC/NC.

The NWS Storm Prediction Center has issued a

Tornado Watch for portions of

central and northeast Alabama

northwest Georgia

western North Carolina

upstate South Carolina

southern middle and eastern Tennessee

Effective this Monday afternoon and evening from 130 PM until 800

PM EST.

Tornadoes... hail to 1.5 inches in diameter... thunderstorm wind

gusts to 70 mph... and dangerous lightning are possible in these

areas.

The Tornado Watch area is approximately along and 110 statute

miles east and west of a line from 50 miles north of Hickory

North Carolina to 50 miles southeast of Tuscaloosa Alabama. For

a complete depiction of the watch see the associated watch

outline update (wous64 kwns wou3).

Remember... a Tornado Watch means conditions are favorable for

tornadoes and severe thunderstorms in and close to the watch

area. Persons in these areas should be on the lookout for

threatening weather conditions and listen for later statements

and possible warnings.

Other watch information... this Tornado Watch replaces Tornado

Watch number 31. Watch number 31 will not be in effect after 130

PM EST. Continue... ww 32...

Discussion... storm coverage/intensity should increase through the

afternoon along and immediately ahead of a weak surface wave across

middle TN... and in advance of a midlevel trough over nrn MS/wrn

TN/wrn KY. The storm environment remains favorable for supercells

and a few tornadoes across se TN/al/NW GA per the 18z bmx sounding.

Farther N... storms in ern TN will develop ewd into NW NC... along the

outflow boundary from the earlier convection that crossed into VA.

Instability will be a little weaker than areas farther SW... but

vertical shear remains strong... and the potential will remain for

embedded supercell structures. Later during the

afternoon... convection is expected to evolve into more of a linear

system with a threat for damaging winds and brief spin ups along the

bowing line segments.

Aviation... tornadoes and a few severe thunderstorms with hail

surface and aloft to 1.5 inches. Extreme turbulence and surface

wind gusts to 60 knots. A few cumulonimbi with maximum tops to

450. Mean storm motion vector 26045.

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Hello everyone, long time reader first time poster, and wanted to log a report.

I work at the U of Tennessee and have a view of the downtown area that most are jealous of from my 11th floor office. On a clear day I can see the mountains off in the far distance and all of the downtown skyscrapers, the Sunsphere, and into Neyland Stadium. Earlier this morning (roughly 10 AM) when I arrived in the office, I was watching a convergence overhead with light thin clouds to the South of the city and heavy rains North of I-40.

The storm picked up around 12:40 and we had pea-sized hail for a few minutes. I walked my half-mile walk back from teaching at 1 PM as the rain picked up and I am a soaked more than a sponge, even though I had an umbrella. It was quite a torrential rain for about 30 minutes during/after I came back (1:00-1:30). During that period I could not even see Neyland Stadium (except for its lights), let alone downtown or beyond out my window. As I have been typing it's picked back up again and the downtown is slowly disappearing once again.

The local news is showing images of heavy flooding blocking lanes on I-275 and on US-441 among other local streets.

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Hello everyone, long time reader first time poster, and wanted to log a report.

I work at the U of Tennessee and have a view of the downtown area that most are jealous of from my 11th floor office. On a clear day I can see the mountains off in the far distance and all of the downtown skyscrapers, the Sunsphere, and into Neyland Stadium. Earlier this morning (roughly 10 AM) when I arrived in the office, I was watching a convergence overhead with light thin clouds to the South of the city and heavy rains North of I-40.

The storm picked up around 12:40 and we had pea-sized hail for a few minutes. I walked my half-mile walk back from teaching at 1 PM as the rain picked up and I am a soaked more than a sponge, even though I had an umbrella. It was quite a torrential rain for about 30 minutes during/after I came back (1:00-1:30). During that period I could not even see Neyland Stadium (except for its lights), let alone downtown or beyond out my window. As I have been typing it's picked back up again and the downtown is slowly disappearing once again.

The local news is showing images of heavy flooding blocking lanes on I-275 and on US-441 among other local streets.

Go VOLS!

Thanks for the report!

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Hello everyone, long time reader first time poster, and wanted to log a report.

I work at the U of Tennessee and have a view of the downtown area that most are jealous of from my 11th floor office. On a clear day I can see the mountains off in the far distance and all of the downtown skyscrapers, the Sunsphere, and into Neyland Stadium. Earlier this morning (roughly 10 AM) when I arrived in the office, I was watching a convergence overhead with light thin clouds to the South of the city and heavy rains North of I-40.

The storm picked up around 12:40 and we had pea-sized hail for a few minutes. I walked my half-mile walk back from teaching at 1 PM as the rain picked up and I am a soaked more than a sponge, even though I had an umbrella. It was quite a torrential rain for about 30 minutes during/after I came back (1:00-1:30). During that period I could not even see Neyland Stadium (except for its lights), let alone downtown or beyond out my window. As I have been typing it's picked back up again and the downtown is slowly disappearing once again.

The local news is showing images of heavy flooding blocking lanes on I-275 and on US-441 among other local streets.

Thanks for sharing and stay safe !

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