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Sunday, January 24, 2010

A Brief History of a Tornado Warning
01/24/2010

Graphic Courtesy Iowa State University

**7.02pm** Yes, I've typed 2009 instead of 2010 in several places. LOL. I'll fix the map later.



The area above was placed under a Tornado Warning by the National Weather Service for a brief time this afternoon after radar indicated conditions favored the formation of a tornado in Henderson and Buncombe Counties in western North Carolina.

I posted a radar image of the vortex on Twitter via TwitPic.



Here is the way the regional map for the GSP Office of the National Weather Service looked at the time the Tornado warning was issued:


And here is the statement issued:



BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
523 PM EST SUN JAN 24 2010

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* TORNADO WARNING FOR...
EASTERN BUNCOMBE COUNTY IN WESTERN NORTH CAROLINA...
NORTHEASTERN HENDERSON COUNTY IN WESTERN NORTH CAROLINA...

* UNTIL 600 PM EST

* AT 521 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR FLETCHER...
OR 8 MILES NORTH OF HENDERSONVILLE...MOVING NORTHEAST AT 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SKYLAND...BILTMORE FOREST...FAIRVIEW...SWANNANOA...BLACK MOUNTAIN
AND MONTREAT

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR STURDIER SHELTER.
OTHERWISE...GO TO AN INTERIOR ROOM ON THE LOWEST LEVEL OF YOUR HOME
OR PLACE OF BUSINESS. MAKE SURE THERE ARE AS MANY WALLS AND FLOORS
BETWEEN YOU AND THE OUTSIDE AS POSSIBLE.

TO REPORT TORNADOES...DAMAGING WINDS...LARGE HAIL...OR FLOODING...
THROUGH OUR AUTOMATED REPORTING SYSTEM...CALL OUR TOLL FREE NUMBER...
1 8 7 7...6 3 3...6 7 7 2.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM EST MONDAY MORNING FOR
NORTHEAST GEORGIA AND CENTRAL SOUTH CAROLINA.

&&

LAT...LON 3575 8234 3571 8227 3564 8229 3561 8227
3559 8229 3556 8226 3554 8219 3533 8246
3547 8261 3580 8234
TIME...MOT...LOC 2223Z 216DEG 41KT 3545 8249

$$
07


UPDATE #1




SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
539 PM EST SUN JAN 24 2010

NCC089-242248-
/O.CAN.KGSP.TO.W.0001.000000T0000Z-100124T2300Z/
HENDERSON NC-
539 PM EST SUN JAN 24 2010

...THE TORNADO WARNING FOR NORTHEASTERN HENDERSON COUNTY IS
CANCELLED...

THE THUNDERSTORMS SUSPECTED OF PRODUCING A TORNADO MOVED NORTHEAST
AND OUT OF HENDERSON COUNTY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM EST MONDAY MORNING FOR
NORTHEAST GEORGIA AND CENTRAL SOUTH CAROLINA.

LAT...LON 3580 8234 3575 8234 3571 8227 3564 8229
3561 8227 3559 8229 3556 8226 3554 8219
3548 8237 3546 8240 3547 8243 3555 8252
TIME...MOT...LOC 2238Z 217DEG 49KT 3558 8234

$$

NCC021-242300-
/O.CON.KGSP.TO.W.0001.000000T0000Z-100124T2300Z/
BUNCOMBE NC-
539 PM EST SUN JAN 24 2010

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM EST FOR EASTERN
BUNCOMBE COUNTY...

AT 533 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR FAIRVIEW...OR 10
MILES SOUTHEAST OF DOWNTOWN ASHEVILLE...MOVING NORTHEAST AT 55 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BLACK
MOUNTAIN AND MONTREAT

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR STURDIER SHELTER.
OTHERWISE...GO TO AN INTERIOR ROOM ON THE LOWEST LEVEL OF YOUR HOME
OR PLACE OF BUSINESS. MAKE SURE THERE ARE AS MANY WALLS AND FLOORS
BETWEEN YOU AND THE OUTSIDE AS POSSIBLE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM EST MONDAY MORNING FOR
NORTHEAST GEORGIA AND CENTRAL SOUTH CAROLINA.

&&

LAT...LON 3580 8234 3575 8234 3571 8227 3564 8229
3561 8227 3559 8229 3556 8226 3554 8219
3548 8237 3546 8240 3547 8243 3555 8252
TIME...MOT...LOC 2238Z 217DEG 49KT 3558 8234

$$

07

UPDATE #3





SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
548 PM EST SUN JAN 24 2010

NCC021-242258-
/O.CAN.KGSP.TO.W.0001.000000T0000Z-100124T2300Z/
BUNCOMBE NC-
548 PM EST SUN JAN 24 2010

...THE TORNADO WARNING FOR EASTERN BUNCOMBE COUNTY IS CANCELLED...

THE TORNADO HAS DISSIPATED OVER EASTERN BUNCOMBE COUNTY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM EST MONDAY MORNING FOR
NORTHEAST GEORGIA AND CENTRAL SOUTH CAROLINA.

LAT...LON 3580 8234 3575 8234 3571 8227 3564 8229
3561 8227 3559 8229 3556 8226 3554 8219
3548 8237 3546 8240 3547 8243 3555 8252
TIME...MOT...LOC 2248Z 217DEG 49KT 3569 8224

$$

07


TWITTER RESPONDS...

Also, there were a number of tweets issued by people during this event, and here are 
some of them using the word tornado and the #avlnews hashatg:




**7.06pm**

Here are a couple of storm reports from the public I found posted on the NWS website:


2010-01-24 11:00 AM
NON-TSTM WND DMG (NOT MEASURED)
LOCATION: ROBBINSVILLE, NC (GRAHAM COUNTY)
SOURCE: COUNTY OFFICIAL
REMARKS: SEVERAL TREES DOWN ON POWER LINES. MANY POWER OUTAGES REPORTED.



2010-01-24 11:00 AM
NON-TSTM WND DMG (NOT MEASURED)
LOCATION: WAYNESVILLE, NC (HAYWOOD COUNTY)
SOURCE: COUNTY OFFICIAL
REMARKS: TREES DOWN ON POWER LINES NEAR JOHNSON CREEK



2010-01-24 05:23 PM
FUNNEL CLOUD (NOT MEASURED)
LOCATION: 10 SW HENDERSONVILLE, NC (HENDERSON COUNTY)
SOURCE: PUBLIC
REMARKS: PUBLIC REPORT OF FUNNEL CLOUD AND ROARING SOUND.


2010-01-24 05:53 PM
FUNNEL CLOUD (NOT MEASURED)
LOCATION: ANDERSON, SC (ANDERSON COUNTY)
SOURCE: PUBLIC
REMARKS: PUBLIC REPORT OF FUNNEL CLOUD OVER ANDERSON.


2010-01-24 06:45 PM
FLASH FLOOD (NOT MEASURED)
LOCATION: CLEMSON, SC (PICKENS COUNTY)
SOURCE: COUNTY OFFICIAL
REMARKS: DOWNS LOOP ROAD CLOSED DUE TO FLOODING.



2010-01-24 06:45 PM
FLASH FLOOD (NOT MEASURED)
LOCATION: PICKENS, SC (PICKENS COUNTY)
SOURCE: COUNTY OFFICIAL
REMARKS: CITY LAKE ROAD CLOSED DUE TO 12 INCHES OF WATER ON ROADWAY.


**7.52am January 25, 2010**

The GSP Office of the National Weather Service now has an experimental Damage Report graphical interface that is worth checking out. Here is the archive for the time period of the storms yesterday. You can use your mouse to get more information from the icons on the map.

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