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August 2015 Observation thread.


NRVwxfan.

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Getting some nice outflow from the approaching Round 2 here on the west side of the Metro. Round 1 gave some strong-but-not-SVR-reportable winds and a bit of rain when it passed over earlier today, and then strengthened considerably and is now sporting a whole collection of warnings for eastern GA. Round 2 is going to be hitting the metro just in time for rush hour.

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SEVERE THUNDERSTORM WARNING
SCC063-071-079-081-062030-
/O.NEW.KCAE.SV.W.0145.150806T1955Z-150806T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
355 PM EDT THU AUG 6 2015

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN LEXINGTON COUNTY IN CENTRAL SOUTH CAROLINA...
EAST CENTRAL SALUDA COUNTY IN CENTRAL SOUTH CAROLINA...
NORTHWESTERN RICHLAND COUNTY IN CENTRAL SOUTH CAROLINA...
SOUTHEASTERN NEWBERRY COUNTY IN CENTRAL SOUTH CAROLINA...

* UNTIL 430 PM EDT

* AT 354 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
WAS LOCATED 7 MILES NORTHWEST OF IRMO...AND MOVING EAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
COLUMBIA...LEXINGTON...WEST COLUMBIA...CAYCE...IRMO...FOREST
ACRES...SPRINGDALE...ST. ANDREWS...OAK GROVE...DENTSVILLE...ARCADIA
LAKES...FIVE POINTS...BLYTHEWOOD...CHAPIN...LITTLE MOUNTAIN...
PEAK...SEVEN OAKS AND LAKE MURRAY OF RICHLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...ALSO USE WWW.FACEBOOK.COM/NWSCOLUMBIA AND EMAIL
[email protected] TO RELAY SEVERE WEATHER REPORTS.
&&

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SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
410 PM EDT THU AUG 6 2015

NCZ023-039-040-062045-
RANDOLPH NC-ALAMANCE NC-CHATHAM NC-
410 PM EDT THU AUG 6 2015

...A STRONG THUNDERSTORM WILL AFFECT PORTIONS OF EAST CENTRAL
RANDOLPH...SOUTHERN ALAMANCE AND NORTHWESTERN CHATHAM COUNTIES UNTIL
445 PM EDT...

AT 409 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR SILER CITY...MOVING EAST AT 15 MPH.

WIND GUSTS AS HIGH AS 50 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
LIBERTY...STALEY...SAXAPAHAW...SUTPHIN AND SNOW CAMP.

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0.54".  There was a 10 minute period where lightning was popping very close.  Weird thing was there wasn't hardly any thunder until the storm was almost past.  Def saw rotation on the leading edge of the storm.  In one spot the clouds had that distintive counterclockwise swirl going on.

 

Let's see if I can go for round 2 in a little while.  Storms starting to fill back into the western upstate.

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When I look at the Drought Maps, I can't help but notice that the southern US always seems to have more drought areas than the northern US, paritcularly east of the Rockies. Is the south more prone to droughts for some reason ?

 

Yes. It's because of the general atmospheric circulation. The area around 30-38 degrees latitude is known as the "horse latitudes". It's a relatively dry region created by Hadley/Ferrel cell interactions, which promote strong subtropical ridging and suppressive dynamics. If the GOM wasn't there...we'd pretty much be a desert like the SW CONUS.  

 

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0.54".  There was a 10 minute period where lightning was popping very close.  Weird thing was there wasn't hardly any thunder until the storm was almost past.  Def saw rotation on the leading edge of the storm.  In one spot the clouds had that distintive counterclockwise swirl going on.

 

Let's see if I can go for round 2 in a little while.  Storms starting to fill back into the western upstate.

Thats exactly whats happening here. The rain has let up to a solid moderate pace, but its lightning viciously here. One struck literally about 100 meters from the house.

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Looks like its heading right for mby.  Would be nice to get storm #2 and get to the inch mark for the day.

 

Edit:  I see KSPA got 1.24" today.  They somehow always get larger totals than me.  I'm going to tally up the rainfall data from the station near my house and the one from KSPA and see the difference one day when I'm bored.  It has to be substantial.

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