Major derecho - May 8 - Plains to Ohio Valley (beyond?)

[Dave]

1805 EDT Pressure here 29.65" still falling. (here = my house Milan IN)

[Ed Mahmoud]

MESOSCALE DISCUSSION 0766
NWS STORM PREDICTION CENTER NORMAN OK
0503 PM CDT FRI MAY 08 2009

AREAS AFFECTED...EASTERN PORTIONS OF KY/TN INTO WV/NORTH GA AND
WESTERN PORTIONS OF VA/NC/SC

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 082203Z - 082330Z

MONITORING FOR ONE OR MORE ADDITIONAL WATCHES TO THE EAST/SOUTH OF
EXISTING WATCHES 268/271...INCLUDING PORTIONS OF WV/PERHAPS EXTREME
SOUTHERN OH AND FAR NORTH GA INTO THE WESTERN PORTIONS OF VA/NC/SC.

THE BRUNT OF A LONG LIVED/HIGHLY ORGANIZED MCS CONTINUES TO STEADILY
RACE EASTWARD ACROSS EASTERN KY AS OF 2145Z...WITH
SOUTHERN-PERIPHERAL QUASI-DISCRETE SUPERCELLULAR STORMS ACROSS FAR
SOUTHEAST KY/EASTERN TN. ON THE SOUTHEAST PERIPHERY OF TORNADO WATCH
271...WITHIN A WEAKLY CAPPED/SOUTHWESTERLY WARM ADVECTION
REGIME...THERE IS A CONCERN FOR THE AFOREMENTIONED QUASI-DISCRETE
STORM/SUPERCELL MODE TO POSE A SEVERE HAIL/TORNADO RISK TO THE EAST
OF WW 271...SUCH THAT AN ADDITIONAL WATCH COULD BE NEEDED INTO THE
WESTERN PORTIONS OF NC/SC/WESTERN VA. FARTHER NORTH...INSTABILITY
BECOMES MUCH MORE MODEST ACROSS FAR EASTERN KY INTO WV...BUT THE
HIGHLY ORGANIZED NATURE OF THE BOW/COMMA HEAD AND PARENT MCV...ALONG
WITH FAST STORM MOTIONS AMIDST STRENGTHENING LOW TO MID TROPOSPHERIC
FLOW PER REGIONAL WSR-88D VWP/S WITH 50+ KT AT H5...WILL CONTINUE TO
SUPPORT AT LEAST AN ISOLATED DAMAGING WIND/HAIL RISK INTO WV/FAR
WESTERN VA THROUGH EARLY EVENING.

..GUYER.. 05/08/2009


ATTN...WFO...RNK...RLX...GSP...MRX...JKL...FFC...ILN...OHX...

[Dave]

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 272
NWS STORM PREDICTION CENTER NORMAN OK
505 PM CDT FRI MAY 8 2009

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

NORTHERN AND CENTRAL TEXAS

EFFECTIVE THIS FRIDAY AFTERNOON FROM 505 PM UNTIL MIDNIGHT CDT.

TORNADOES...HAIL TO 3 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 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH OF FORT WORTH
TEXAS TO 50 MILES EAST SOUTHEAST OF SAN ANGELO TEXAS. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU2).

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...CONTINUE...WW 268...WW 270...WW 271...

DISCUSSION...SCTD INTENSE TSTMS...POSSIBLE SUPERCELLS...EXPECTED TO
DEVELOP GENERALLY SWD ALONG WEAK NNE-SSW COLD FRONT.
MODEST...DIFFLUENT UPR FLOW...AND VERY MOIST BOUNDARY LAYER/STRONG
SFC-BASED CAPE E OF FRONT SUGGEST POTENTIAL FOR A FEW SUSTAINED
STORMS WITH VERY LARGE HAIL/ISOLD TORNADOES...DESPITE WEAK SFC FLOW.

[Dave]

1805 EDT
FUNNEL CLOUD
4 N HYDEN KY
LESLIE COUNTY
TRAINED SPOTTER

[Dave]

KNOTT KY-PERRY KY-LESLIE KY-LETCHER KY-
606 PM EDT FRI MAY 8 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM EDT FOR WESTERN
LETCHER...CENTRAL LESLIE...SOUTHEASTERN PERRY AND SOUTHWESTERN KNOTT
COUNTIES...

AT 603 PM EDT...THE PUBLIC REPORTED A FUNNEL CLOUD 4 MILES NORTH OF
HYDEN. NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE
A POTENTIAL TORNADO. THE STORM PRODUCINT THE POTENTIAL TORNADO WAS
MOVING EAST AT 50 MPH.

THE TORNADO WILL BE NEAR...
LEATHERWOOD BY 610 PM EDT...
CORNETTSVILLE...DAISY...SLEMP AND VIPER BY 615 PM EDT...
ARMINTA...RED STAR...BLUEFIELD AND ULVAH BY 620 PM EDT...
CARBON GLOW BY 625 PM EDT...

[CrazyC83]

I'm wondering if that new watch is the beginning of yet another derecho tonight/tomorrow?

[Dave]

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON KY
615 PM EDT FRI MAY 8 2009

THE NATIONAL WEATHER SERVICE IN JACKSON KY
HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
JOHNSON COUNTY IN NORTHEAST KENTUCKY...
MARTIN COUNTY IN NORTHEAST KENTUCKY...
NORTHEASTERN BREATHITT COUNTY IN SOUTHEAST KENTUCKY...
NORTHERN FLOYD COUNTY IN SOUTHEAST KENTUCKY...
MAGOFFIN COUNTY IN SOUTHEAST KENTUCKY...
EAST CENTRAL MORGAN COUNTY IN SOUTHEAST KENTUCKY...
NORTHWESTERN PIKE COUNTY IN SOUTHEAST KENTUCKY...

* UNTIL 700 PM EDT

* AT 612 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS. THESE STORMS WERE LOCATED ALONG A
LINE EXTENDING FROM OPHIR TO CYRUS TO SUBLETT...OR ALONG A LINE
EXTENDING FROM 12 MILES SOUTHEAST OF SANDY HOOK TO
SALYERSVILLE... AND MOVING EAST AT 55 MPH. THESE STORMS MAY
PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
BARNROCK...LEANDER...SWAMP BRANCH AND RICEVILLE BY 620 PM EDT...
WINIFRED...WITTENSVILLE...WEST VAN LEAR AND THEALKA BY 625 PM
EDT...
DWALE AND WILLIAMSPORT BY 630 PM EDT...

[Dave]

I'm wondering if that new watch is the beginning of yet another derecho tonight/tomorrow?

Checked the warnings & 3 thunderstorm warnings are in the TX box now.

[Dave]

UNION TN-CAMPBELL TN-CLAIBORNE TN-
615 PM EDT FRI MAY 8 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM EDT FOR
CLAIBORNE...CAMPBELL AND UNION COUNTIES...

AT 610 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR ROYAL BLUE...OR 9
MILES WEST OF LA FOLLETTE...MOVING EAST AT 40 MPH. THIS STORMS HAS
A HISTORY OF PRODUCING TORNADOES...4 HOUSES HAVE BEEN DAMAGED IN
HUNTSVILLE...TN WHEN THE STORM MOVED THROUGH. THIS IS AN EXTREMELY
DANGEROUS STORM...TAKE COVER IMMEDIATELY!!

THE TORNADO WILL BE NEAR...
6 MILES NORTH OF JACKSBORO BY 620 PM EDT...
LA FOLLETTE BY 625 PM EDT...
FINCASTLE AND 8 MILES SOUTH OF WHITE OAK BY 630 PM EDT...
9 MILES NORTH OF NORRIS LAKE AND 9 MILES SOUTH OF CLAIRFIELD BY 640
PM EDT...
7 MILES NORTHWEST OF SHARPS CHAPEL BY 645 PM EDT...

[Dave]

Pressure 29.61" still falling SE Indiana (home) 1819 hrs edt

Additional: Winds SE @ 16 mph

[srainhoutx]

We may have need to post in the various Topics that are ongoing tonight. The derecho complex may continue on into VA/NC/MD.

[Dave]

We may have need to post in the various Topics that are ongoing tonight. The derecho complex may continue on into VA/NC/MD.

Title (beyond?)

[srainhoutx]

We may have need to post in the various Topics that are ongoing tonight. The derecho complex may continue on into VA/NC/MD.

Title (beyond?)

[Dave]

Swinging back to the western side of Tornado Watch # 271:

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
529 PM CDT FRI MAY 8 2009

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN MISSISSIPPI COUNTY IN EASTERN ARKANSAS...
SOUTHERN DYER COUNTY IN NORTHWEST TENNESSEE...
SOUTH CENTRAL PEMISCOT COUNTY IN SOUTHEAST MISSOURI...
EXTREME NORTHWESTERN HAYWOOD COUNTY IN SOUTHWEST TENNESSEE...
NORTHEASTERN LAUDERDALE COUNTY IN SOUTHWEST TENNESSEE...

* UNTIL 615 PM CDT

* AT 530 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM PRODUCING PENNY SIZE HAIL...AND DAMAGING WINDS
IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 7 MILES SOUTHWEST OF
HELOISE...OR 11 MILES SOUTHEAST OF STEELE...AND MOVING SOUTHEAST AT
15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
UNIONVILLE...RIPLEY AND HALLS. THIS WARNING ALSO INCLUDES CHISHOLM
LAKE.

[Dave]

East of Lafollette TN:

[Ed Mahmoud]

If nothing new pops, I think most of Tarrant and Dallas counties will miss the worst of the weather.


If nothing new pops...

[Dave]

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
638 PM EDT FRI MAY 8 2009

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* TORNADO WARNING FOR...
EASTERN CAMPBELL COUNTY IN EAST TENNESSEE...
CLAIBORNE COUNTY IN EAST TENNESSEE...
NORTHERN GRAINGER COUNTY IN EAST TENNESSEE...
NORTHERN UNION COUNTY IN EAST TENNESSEE...

* UNTIL 730 PM EDT

* AT 636 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 21 MILES WEST OF
TAZEWELL...OR 10 MILES EAST OF LA FOLLETTE...MOVING EAST AT 40 MPH.

* THE TORNADO WILL BE NEAR...
TAZEWELL BY 705 PM EDT...

THIS IS AN EXTREMELY DANGEROUS STORM THAT HAS A HISTORY OF PRODUCING
TORNADOES! TAKE COVER IMMEDIATELY!!

[Dave]

SE IN (home) Pressure at 1846 edt: 29.67" rising (lowest was 29.57")

[Dave]

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON KY
645 PM EDT FRI MAY 8 2009

THE NATIONAL WEATHER SERVICE IN JACKSON KY
HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN CLAY COUNTY IN SOUTHEAST KENTUCKY...
SOUTHEASTERN JACKSON COUNTY IN SOUTHEAST KENTUCKY...
SOUTHERN OWSLEY COUNTY IN SOUTHEAST KENTUCKY...

* UNTIL 715 PM EDT

* AT 643 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
BOND...OR 8 MILES SOUTH OF MCKEE...AND MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
EGYPT...WELCHBURG...TYNER AND MILDRED BY 650 PM EDT...
SHEPHERDTOWN...ZEKES POINT...MAULDEN AND HERD BY 655 PM EDT...
SOURWOOD AND MALCOMB BY 700 PM EDT...

[Dave]

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
650 PM EDT FRI MAY 8 2009

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN JACKSON COUNTY IN WESTERN NORTH CAROLINA...
THIS INCLUDES THE CITY OF SYLVA...
CENTRAL SWAIN COUNTY IN WESTERN NORTH CAROLINA...
THIS INCLUDES THE CITY OF BRYSON CITY...

* UNTIL 745 PM EDT

* AT 649 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
BRYSON CITY...AND MOVING EAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
CHEROKEE...
DILLSBORO...
SYLVA AND WEBSTER...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE IN THE PATH OF THIS SEVERE THUNDERSTORM SHOULD BE ALERT FOR
LARGE HAIL AND DAMAGING WINDS. FREQUENT LIGHTNING AND LOCALLY HEAVY
RAIN CAN OCCUR WITH ANY THUNDERSTORM.