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Summer 2015 pattern discussion


GaWx

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The MJO is getting into phase 8 which should be cooler for us, correct? 

 

Also Our favorite Met JB thinks the ridge breaks down and forms a trough over the East coast and the SE. 

 

ECMF_phase_51m_small.gif

 

Well we have had several little interludes of troughing in between the heatwaves.  The problem seems to be that the ridge is sliding off to the west which puts us in NW flow, which is not very wet.

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The humidity this summer has been unreal. Is it even possible to have a day in July where the dewpoint is  below 70 ?

Humidity around Charlotte hasn't been a problem. Dew points have been mixing into the low 60's and even 50's some days.

Been in Myrtle Beach and Oak Island the last several days and it has been absolutely miserable if your not on the beach with DP in the 75 to 79 range. At least it gave up some excellent storms though. I saw more lightning from one storm in 10 minutes here then I've seen at home all summer. Watching a good lightning show from an offshore t-storm is the best.

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Humidity around Charlotte hasn't been a problem. Dew points have been mixing into the low 60's and even 50's some days.

Been in Myrtle Beach and Oak Island the last several days and it has been absolutely miserable if your not on the beach with DP in the 75 to 79 range. At least it gave up some excellent storms though. I saw more lightning from one storm in 10 minutes here then I've seen at home all summer. Watching a good lightning show from an offshore t-storm is the best.

 

Due to the lack of rain the DP's have been lower and now caught in the cycle of drought breeding more drought.  We've had maybe 2 thunderstorms this summer - can't wait to hit the beach next month.

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Looks like the heat returns here next week. Good thing I will be in Myrtle Beach, where it's not supposed to get above 90 all week.

:lol:  Think again  

 

ILM.....

 

.LONG TERM /MONDAY THROUGH THURSDAY/...

AS OF 300 AM FRIDAY...BIG HEAT EXPECTED FOR THE FIRST HALF OF THE

UPCOMING WEEK...WITH DANGEROUS HEAT INDICES ONCE AGAIN POSSIBLE.

MASSIVE UPPER RIDGE BUILDS ACROSS 2/3 OF THE NATION MONDAY AND

TUESDAY AND INTO WEDNESDAY. THE CENTER OF THIS RIDGE WILL REMAIN

OVER THE CENTER OF THE NATION...SO MID-LEVEL FLOW LOCALLY WILL BE

W/NW. THE AIRMASS COMING INTO THE CAROLINAS EARLY NEXT WEEK

ORIGINATES ACROSS THE MEXICAN MOUNTAINS AND THEN ADVECTS AROUND THE

RIDGE AND INTO THE MID-ATLANTIC. THIS DRIVES TREMENDOUSLY WARM 850MB

AIR INTO THE AREA...WITH THE GFS SHOWING 24C...ALTHOUGH THE COOLER

ECMWF KEEPING TEMPS TO 22C AT THAT LEVEL. THE GFS HAS PERFORMED

BETTER WITH THE BIG HEAT THIS SUMMER HOWEVER...AND IS PREFERRED.

THIS WILL DRIVE HIGHS WELL INTO THE 90S EVEN AT THE COAST...WITH 100

DEGREE READINGS POSSIBLY RETURNING TO INLAND ZONES. LOWS AT NIGHT

WILL STRUGGLE TO DROP MUCH BELOW 80. FORCING DURING THIS TIME IS

LIMITED AS WELL...BUT WITH A POTENTIAL MEXICAN EML AND VERY

HOT/UNSTABLE AIR IN PLACE...SCT CONVECTION WILL BE POSSIBLE EACH

DAY. LATE WEDNESDAY INTO THURSDAY...GUIDANCE TRIES TO PUSH A FRONT

DOWN INTO THE AREA WITH HEIGHTS LOWERING ALOFT. AS THE RIDGE STAYS

TO THE WEST...IT IS POSSIBLE THAT A BOUNDARY WILL DRAG THIS FAR

SOUTH...ALTHOUGH THIS IS CLIMATOLOGICALLY WELL OUT OF SEASON. FOR

NOW WILL SHOW SLIGHTLY COOLER TEMPS AT THE END OF THE PERIOD ALONG

WITH SLIGHTLY HIGHER POP.

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:lol:  Think again  

 

ILM.....

 

.LONG TERM /MONDAY THROUGH THURSDAY/...

AS OF 300 AM FRIDAY...BIG HEAT EXPECTED FOR THE FIRST HALF OF THE

UPCOMING WEEK...WITH DANGEROUS HEAT INDICES ONCE AGAIN POSSIBLE.

MASSIVE UPPER RIDGE BUILDS ACROSS 2/3 OF THE NATION MONDAY AND

TUESDAY AND INTO WEDNESDAY. THE CENTER OF THIS RIDGE WILL REMAIN

OVER THE CENTER OF THE NATION...SO MID-LEVEL FLOW LOCALLY WILL BE

W/NW. THE AIRMASS COMING INTO THE CAROLINAS EARLY NEXT WEEK

ORIGINATES ACROSS THE MEXICAN MOUNTAINS AND THEN ADVECTS AROUND THE

RIDGE AND INTO THE MID-ATLANTIC. THIS DRIVES TREMENDOUSLY WARM 850MB

AIR INTO THE AREA...WITH THE GFS SHOWING 24C...ALTHOUGH THE COOLER

ECMWF KEEPING TEMPS TO 22C AT THAT LEVEL. THE GFS HAS PERFORMED

BETTER WITH THE BIG HEAT THIS SUMMER HOWEVER...AND IS PREFERRED.

THIS WILL DRIVE HIGHS WELL INTO THE 90S EVEN AT THE COAST...WITH 100

DEGREE READINGS POSSIBLY RETURNING TO INLAND ZONES. LOWS AT NIGHT

WILL STRUGGLE TO DROP MUCH BELOW 80. FORCING DURING THIS TIME IS

LIMITED AS WELL...BUT WITH A POTENTIAL MEXICAN EML AND VERY

HOT/UNSTABLE AIR IN PLACE...SCT CONVECTION WILL BE POSSIBLE EACH

DAY. LATE WEDNESDAY INTO THURSDAY...GUIDANCE TRIES TO PUSH A FRONT

DOWN INTO THE AREA WITH HEIGHTS LOWERING ALOFT. AS THE RIDGE STAYS

TO THE WEST...IT IS POSSIBLE THAT A BOUNDARY WILL DRAG THIS FAR

SOUTH...ALTHOUGH THIS IS CLIMATOLOGICALLY WELL OUT OF SEASON. FOR

NOW WILL SHOW SLIGHTLY COOLER TEMPS AT THE END OF THE PERIOD ALONG

WITH SLIGHTLY HIGHER POP.

I predict at least one post complaining about the high temps at the "Redneck Riviera" from Brick.

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It feels like we are going to be stuck in this pattern until the world ends.  When will it ever stop?  I miss the summers where we struggled to get above 90° and we actually had a real 30% chance of rain instead of the downsloping 30% chance of rain, which in reality is more like 10% here.

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It feels like we are going to be stuck in this pattern until the world ends.  When will it ever stop?  I miss the summers where we struggled to get above 90° and we actually had a real 30% chance of rain instead of the downsloping 30% chance of rain, which in reality is more like 10% here.

IMHO, I've been living in the south since 1983. A majority of the summer here are hot and dry with little pattern change. It's a rare year that we get into any consistent wetter or cooler pattern.

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IMHO, I've been living in the south since 1983. A majority of the summer here are hot and dry with little pattern change. It's a rare year that we get into any consistent wetter or cooler pattern.

 

Yeah I've lived in the south forever.  It just seems like the majority of forecast discussions this summer always mention above climo temps.  I know we aren't going to have gulf lows coming through like we do outside of summer, but usually we can count on a decent chance of storms in the afternoons.  That is what seems to be missing this year.  Almost everything that has formed in the lee this summer has just been small popcorn showers that only affect a small area.  What does form is always short lived because of the downsloping.  Just ready for summer to be over with now so I can enjoy being outdoors.

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IMHO, I've been living in the south since 1983. A majority of the summer here are hot and dry with little pattern change. It's a rare year that we get into any consistent wetter or cooler pattern.

Yep it's mostly either hot or fairly dry in this part of the country during the summer. Since 1980, only these summers were wet and with temps at or maybe slightly below normal. 

  1982

  1984

  1989

  1992

  1994

  2003

  2013

  2014

That's not very many out of 35 years. As for really hot and dry summers, these come to mind.

  1980

  1986

  1993

  1999

  2002

  2007

Most of the other years would probably average out to slightly above on temps and slightly below on precip.

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Awesome!

 

.SHORT TERM /SATURDAY NIGHT THROUGH MONDAY/...
AS OF 315 PM FRIDAY...THE WESTERN CAROLINAS AND NORTHEAST GEORGIA
WILL REMAIN ON THE PERIPHERY OF THE SUBTROPICAL HIGH...WHICH WILL BE
CENTERED ACROSS THE ARKLATX THROUGH THE SHORT TERM PERIOD. THE
LATEST GUIDANCE KEEPS THE RIDGE ASSOCIATED WITH THE HIGH IN PLACE
LONGER THAN PREVIOUS RUNS. THIS RESULTS IN A FLATTER FLOW NORTH OF
THE CWFA KEEPING ANY SHORT WAVE ACTIVITY TO OUR NORTH AS WELL.
THE
PREVIOUS GUIDANCE MOVES A WEAK FRONTAL SYSTEM SOUTH INTO THE AREA
MONDAY IN NWLY FLOW ALOFT. HOWEVER...THE NEW GUIDANCE KEEPS THE
FRONT CLOSER TO THE OH VALLEY IN THE FLATTER FLOW. THIS RESULTS IN
LESS DIURNAL CONVECTION ACROSS THE CWFA IN DRIER W TO NW LOW LEVEL
FLOW
. AS A RESULT...BEST CHC FOR CONVECTION WILL REMAIN ACROSS THE
MTNS WITH LOWER CHC ELSEWHERE. THE EXCEPTION IS SAT NITE WHEN
ONGOING CONVECTION WILL MOVE OUT OF THE MTNS AND ACROSS THE REST OF
THE CWFA INTO THE EVENING. SEVERE POTENTIAL APPEARS TO BE LOWER AS
WELL...MAINLY DUE TO LOWER COVERAGE AND DRIER LOW LEVELS. THAT
SAID...DCAPE VALUES WILL BE HIGH...SO ANY STORMS THAT FORM COULD
DEVELOP DAMAGING WINDS. HIGH TEMPS WILL RISE INTO THE MID TO UPPER
90S OUTSIDE OF THE MTNS AND AROUND 90 IN THE VALLEYS. RESULTING HEAT
INDEX VALUES COULD MAKE A RUN AT 105...MAINLY ALONG AND SOUTH OF
I-85...ESPECIALLY ON MONDAY WHEN THE FLOW TURNS MORE WLY AND LESS
DOWNSLOPE KEEPING DEW POINTS FROM BOTTOMING OUT.

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Back from the beach and now able to look at the models more. But, nothing great to look forward to in terms of cool weather. The 6z GFS this morning has wall to wall heat for a good portion of the nation in the near term and extended. Below is day 8. I would normally not put to much stock in day 8 depictions but you could use this look for day 3 to 15 and it would be close.

 

http://www.twisterdata.com/index.php?prog=forecast&model=GFS&grid=3&model_yyyy=2015&model_mm=07&model_dd=18&model_init_hh=06&fhour=204&parameter=TMPF&level=2&unit=M_ABOVE_GROUND&maximize=n&mode=singlemap&sounding=n&output=image&view=large&archive=false

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