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April 15th Severe weather thread Tornado outbreak possible


janetjanet998

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from reed timmer:

"We chased the tornado into extreme western Alabama, and are now heading back to Jackson.. The scene in Leakesville was really scary. Thought it was going to be Yazoo all over again. There was a massive transformer fire just outside of town, a car blown off the road with the occupants uninjured, but thankfully it looked like the core of the tornado was barely north of town."

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100 preliminary tornado reports - just hit 100 at 10 pm.

I knew for a few days this event had the potential to be intense but I didn't think it would be this prolific. Good job by all here on the board. I especially appreciate radar images from software I do not have and reports from chasers and spotters.

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SEVERE WEATHER STATEMENT

NATIONAL WEATHER SERVICE BIRMINGHAM AL

1134 PM CDT FRI APR 15 2011

ALC017-037-051-123-160515-

/O.CON.KBMX.TO.W.0089.000000T0000Z-110416T0515Z/

ELMORE AL-COOSA AL-TALLAPOOSA AL-CHAMBERS AL-

1134 PM CDT FRI APR 15 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WESTERN CHAMBERS...CENTRAL

TALLAPOOSA...SOUTHEASTERN COOSA AND NORTHEASTERN ELMORE COUNTIES

UNTIL 1215 AM CDT...

AT 1131 PM CDT...EMERGENCY MANAGEMENT REPORTED A TORNADO WITH

SIGNIFICANT DAMAGE IN NORTHERN ELMORE COUNTY. THIS TORNADO WAS

LOCATED NEAR EQUALITY...MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...

DADEVILLE...CAMP HILL...WIND CREEK STATE PARK...STILL WATERS

RESORT...JACKSONS' GAP...JACKSONS GAP...WAVERLY...RIDGE GROVE...

WEST CHAMBERS AND STURKIE.

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SEVERE WEATHER STATEMENT

NATIONAL WEATHER SERVICE BIRMINGHAM AL

1134 PM CDT FRI APR 15 2011

ALC017-037-051-123-160515-

/O.CON.KBMX.TO.W.0089.000000T0000Z-110416T0515Z/

ELMORE AL-COOSA AL-TALLAPOOSA AL-CHAMBERS AL-

1134 PM CDT FRI APR 15 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WESTERN CHAMBERS...CENTRAL

TALLAPOOSA...SOUTHEASTERN COOSA AND NORTHEASTERN ELMORE COUNTIES

UNTIL 1215 AM CDT...

AT 1131 PM CDT...EMERGENCY MANAGEMENT REPORTED A TORNADO WITH

SIGNIFICANT DAMAGE IN NORTHERN ELMORE COUNTY. THIS TORNADO WAS

LOCATED NEAR EQUALITY...MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...

DADEVILLE...CAMP HILL...WIND CREEK STATE PARK...STILL WATERS

RESORT...JACKSONS' GAP...JACKSONS GAP...WAVERLY...RIDGE GROVE...

WEST CHAMBERS AND STURKIE.

How much more siginificant damage is going to be done? Well at least the casuality rate stayed down. I hope it stays like that.

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Looks more broad now on that cell...

Defin better parameters as you go down into AL/MS

That same type of cell placed down there with that same signature would be trouble.

LCL there might be higher - with the GA cells. Still some major hailers with the baseball reports. Impressive considering the CAPE values.

That NE Gomex eddy is in full swing this year. It's right under the 4500 on your chart.

2011104atsha.png

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BULLETIN - EAS ACTIVATION REQUESTED

TORNADO WARNING

NATIONAL WEATHER SERVICE BIRMINGHAM AL

1153 PM CDT FRI APR 15 2011

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* TORNADO WARNING FOR...

NORTHERN CHAMBERS COUNTY IN EAST CENTRAL ALABAMA...

SOUTHERN RANDOLPH COUNTY IN EAST CENTRAL ALABAMA...

NORTHERN TALLAPOOSA COUNTY IN EAST CENTRAL ALABAMA...

* UNTIL 1245 AM CDT

* AT 1149 PM CDT...EMERGENCY MANAGEMENT REPORTED A TORNADO NEAR

JACKSONS' GAP...OR 6 MILES EAST OF ALEXANDER CITY. DOPPLER RADAR

SHOWED THIS TORNADO MOVING NORTHEAST AT 50 MPH. SIGNIFICANT DAMAGE

HAS BEEN REPORTED THIS STORM!! TAKE COVER NOW TO PROTECT YOUR

LIFE!!

* LOCATIONS IMPACTED INCLUDE...

LAFAYETTE...STROUD...ROANOKE...NEW SITE...RIDGE GROVE...TRAMMEL

CROSSROADS...SPARKLING SPRINGS...WADLEY...PENTON AND ABANDA.

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ALC035-039-053-160545-

/O.CON.KMOB.TO.W.0083.000000T0000Z-110416T0545Z/

ESCAMBIA AL-COVINGTON AL-CONECUH AL-

1155 PM CDT FRI APR 15 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT FOR

SOUTHEASTERN CONECUH...CENTRAL COVINGTON AND EASTERN ESCAMBIA

COUNTIES...

AT 1149 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO

INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS

TORNADO WAS NEAR LONDON...OR ABOUT 9 MILES NORTH OF BREWTON...MOVING

EAST AT 45 MPH.

THIS TORNADIC CIRCULATION HAS STRENGTHENED SIGNIFICANTLY IN THE PAST

FIVE MINUTES AND APPEARS TO BE EVOLVING INTO A DANGEROUS SITUATION.

TAKE COVER NOW IF YOU ARE IN THE PATH OF THIS STORM!

THE TORNADO WILL BE NEAR...

NYMPH AROUND MIDNIGHT CDT...

JOHNSONVILLE AROUND 1205 AM CDT...

PAUL...MOUNT UNION AND BROOKLYN AROUND 1215 AM CDT...

MELROSE AROUND 1220 AM CDT...

LOANGO AROUND 1225 AM CDT...

RHUMP AND RED LEVEL AROUND 1230 AM CDT...

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BTW there have been four fatalities (all in AL) from today's tornadoes - one in Marengo Co where a mobile home was tossed 1/4 of a mile - and 3 in Washington Co from the Leakesville storm.

In total from this system there have been 13 total fatalities, including the Tushka tornado and 7 fatalities in AR overnight from the derecho.

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Probably the first time I have ever seen this...

SEVERE WEATHER STATEMENT

NATIONAL WEATHER SERVICE BIRMINGHAM AL

1220 AM CDT SAT APR 16 2011

ALC017-111-123-160545-

/O.CON.KBMX.TO.W.0090.000000T0000Z-110416T0545Z/

TALLAPOOSA AL-CHAMBERS AL-RANDOLPH AL-

1220 AM CDT SAT APR 16 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN RANDOLPH...

NORTHERN CHAMBERS AND NORTHERN TALLAPOOSA COUNTIES UNTIL 1245 AM

CDT...

AT 1217 AM CDT...EMERGENCY MANAGEMENT REPORTED A TORNADO ACROSS

SEVERAL COUNTIES! THIS TORNADO WAS LOCATED NEAR ABANDA...OR 10

MILES WEST OF ROANOKE...MOVING NORTHEAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...

STROUD...ROANOKE...FREDONIA...LAKEVIEW...WELCH...POST OAK FORKS...

VEASEY CREEK PARK...AMITY PARK...CRYSTAL LAKE AND SOUTHERN HARBOR.

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That would be my guess, which if true is very significant.

Maybe meterology programs need an extra semester of technical writing. :)

Only joking, I know from my job in a stressful situation what you compose in your brain doesn't make it to your fingertips with 100% accuracy all the time.

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91 preliminary reports today. That is the same number as the final preliminary reports from April 7, 2006.

Just a reminder that the comparisons aren't apples to apples

Please note: On March 8, 2011, the proximity space/time rule is no longer being utilized to de-duplicate events and minimal filtering is now applied to the decoded reports. All comments/remarks in the LSRs are captured on the raw files and the users can decide, for their own purposes, the best way to remove duplicate reports from the LSR's.
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Cell heading toward the Northern side of Atlanta metro.

BULLETIN - EAS ACTIVATION REQUESTED

TORNADO WARNING

NATIONAL WEATHER SERVICE PEACHTREE CITY GA

210 AM EDT SAT APR 16 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* TORNADO WARNING FOR...

COBB COUNTY IN NORTH CENTRAL GEORGIA

DOUGLAS COUNTY IN NORTH CENTRAL GEORGIA

SOUTHWESTERN FULTON COUNTY IN NORTH CENTRAL GEORGIA

EAST CENTRAL CARROLL COUNTY IN NORTHWEST GEORGIA

SOUTHEASTERN PAULDING COUNTY IN NORTHWEST GEORGIA

* UNTIL 300 AM EDT

* AT 206 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A

SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR

WHITESBURG...MOVING NORTHEAST AT 55 MPH.

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

CHATTAHOOCHEE HILL COUNTRY...DOUGLASVILLE...LITHIA SPRINGS...

AUSTELL...POWDER SPRINGS...SMYRNA...MARIETTA AND BUCKHEAD.

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Quite an eventful day, to say the least. Before this morning, while I recognized the potential for this to become a major tornado outbreak given the mid-level cooling and the bullish SREF parameters, there were still some question marks regarding whether the LLJ axis would shift too far east and whether the helicity would be good enough for an upper-end event. It started to become clear during yesterday's model runs that the LLJ would hang back at around the MS/AL border, allowing a region of overlap with substantial instability in the warm sector. Honestly, I wasn't completely convinced of this verifying until this morning, when it became clear from the HRRR/RUC runs and the developing cells advancing faster than the LLJ.

The few cells that stayed potent along and east of I-65 still somewhat puzzles me though, given that the instability (even in the lower-levels) was cut so much there. It seems that this does happen from time to time with extreme-helicity events.

This event, as well as the last few, have really illustrated the point that while there are such things as nearly-certain, slam-dunk tornado outbreaks (the really, really big ones come to mind)...most events (or non-events) have at least a few question marks regarding some aspect of it. That's just the nature of convective forecasting I guess. However, it is possible most times to get a decent grasp of how much potential an event has.

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I'm a little sick and tired of this d parade of storms (since Feb?). Seems like a good sized storm at least once a week, and just plain rain, damp conditions, brief warmups. No sure when this pattern will break, but why couldn't this be Jan/Feb when we had the cold air. :LOL

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Once the ATL tornado warning expires it will be the first time the U.S. has gone without a tornado warning somewhere for at least 16 (if not more) hours. Not bad.

Really put this outbreak into perspective. Simply amazing and still not over per tomorrow's action.

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