Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
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Watch Status Reports.
SEL2
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 492
NWS Storm Prediction Center Norman OK
1020 AM EDT Thu Sep 17 2020
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Central and Eastern South Carolina
* Effective this Thursday morning and evening from 1020 AM until
600 PM EDT.
* Primary threats include...
A few tornadoes possible
Isolated damaging wind gusts to 70 mph possible
SUMMARY...Isolated supercells are possible today along a warm front
extending across central/eastern South Carolina. A few of these
storms could produce brief tornadoes.
The tornado watch area is approximately along and 40 statute miles
either side of a line from 45 miles southwest of Columbia SC to 35
miles east of Florence SC. For a complete depiction of the watch see
the associated watch outline update (WOUS64 KWNS WOU2).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 0.5 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 22030.
...Hart
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW2
WW 492 TORNADO SC 171420Z - 172200Z
AXIS..40 STATUTE MILES EITHER SIDE OF LINE..
45SW CAE/COLUMBIA SC/ - 35E FLO/FLORENCE SC/
..AVIATION COORDS.. 35NM EITHER SIDE /28ESE IRQ - 28E FLO/
HAIL SURFACE AND ALOFT..0.5 INCH. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 22030.
LAT...LON 34028187 34737932 33637890 32918146
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU2.
Watch 492 Status Report Messages:
STATUS REPORT #7 ON WW 492
VALID 172020Z - 172140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 NNW CHS
TO 35 NNE FLO.
..KERR..09/17/20
ATTN...WFO...CAE...ILM...
&&
STATUS REPORT FOR WT 492
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SCC033-041-043-067-089-172140-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
DILLON FLORENCE GEORGETOWN
MARION WILLIAMSBURG
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #6 ON WW 492
VALID 171920Z - 172040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 SE OGB TO
30 NNW FLO.
..KERR..09/17/20
ATTN...WFO...CAE...ILM...
&&
STATUS REPORT FOR WT 492
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SCC027-033-041-043-067-069-089-172040-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
CLARENDON DILLON FLORENCE
GEORGETOWN MARION MARLBORO
WILLIAMSBURG
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #5 ON WW 492
VALID 171840Z - 171940Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 SE OGB TO
35 WNW FLO.
..KERR..09/17/20
ATTN...WFO...CAE...ILM...
&&
STATUS REPORT FOR WT 492
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SCC025-027-031-033-041-043-051-061-067-069-089-171940-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
CHESTERFIELD CLARENDON DARLINGTON
DILLON FLORENCE GEORGETOWN
HORRY LEE MARION
MARLBORO WILLIAMSBURG
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #4 ON WW 492
VALID 171725Z - 171840Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 SSW OGB
TO 45 NE CAE.
..KERR..09/17/20
ATTN...WFO...CAE...ILM...
&&
STATUS REPORT FOR WT 492
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SCC025-027-031-033-041-043-051-055-061-067-069-075-085-089-
171840-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
CHESTERFIELD CLARENDON DARLINGTON
DILLON FLORENCE GEORGETOWN
HORRY KERSHAW LEE
MARION MARLBORO ORANGEBURG
SUMTER WILLIAMSBURG
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 492
VALID 171655Z - 171740Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 SE AGS TO
5 SW CAE TO 15 NNW CAE.
..KERR..09/17/20
ATTN...WFO...CAE...ILM...
&&
STATUS REPORT FOR WT 492
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SCC009-017-025-027-031-033-041-043-051-055-061-067-069-075-079-
085-089-171740-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
BAMBERG CALHOUN CHESTERFIELD
CLARENDON DARLINGTON DILLON
FLORENCE GEORGETOWN HORRY
KERSHAW LEE MARION
MARLBORO ORANGEBURG RICHLAND
SUMTER WILLIAMSBURG
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 492
VALID 171635Z - 171740Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..09/17/20
ATTN...WFO...CAE...ILM...
&&
STATUS REPORT FOR WT 492
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SCC003-009-011-017-025-027-031-033-041-043-051-055-061-063-067-
069-075-079-081-085-089-171740-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
AIKEN BAMBERG BARNWELL
CALHOUN CHESTERFIELD CLARENDON
DARLINGTON DILLON FLORENCE
GEORGETOWN HORRY KERSHAW
LEE LEXINGTON MARION
MARLBORO ORANGEBURG RICHLAND
SALUDA SUMTER WILLIAMSBURG
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 492
VALID 171545Z - 171640Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..09/17/20
ATTN...WFO...CAE...ILM...
&&
STATUS REPORT FOR WT 492
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SCC003-009-011-017-025-027-031-033-041-043-051-055-061-063-067-
069-075-079-081-085-089-171640-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
AIKEN BAMBERG BARNWELL
CALHOUN CHESTERFIELD CLARENDON
DARLINGTON DILLON FLORENCE
GEORGETOWN HORRY KERSHAW
LEE LEXINGTON MARION
MARLBORO ORANGEBURG RICHLAND
SALUDA SUMTER WILLIAMSBURG
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Mod (50%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (20%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (30%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Low (<5%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (<5%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
Mod (40%)
|
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The "Low" category contains probability values ranging from less than 2%
to 20% (EF2-EF5 tornadoes), less than 5% to 20% (all other probabilities),
"Moderate" from 30% to 60%, and "High" from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.