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1/13, 1/14 - Freezing rain threat


packfan98

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That's down substantially from the last run, right?  Wasn't the last run at .4 for RDU?

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That's down substantially from the last run, right?  Wasn't the last run at .4 for RDU?

 

 

Goes up and up earlier today, and now it is going down as we get closer. Crazy.

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This is a pattern I've noticed over the last couple of years of tracking these things.  You usually see a decent ramp up in QPF starting 24-36 hours out and then a consistent drop-off as you close in.  Anyway, here's the latest radar.  Precip is "exploding" now to the right of the red wall.

 

post-987-0-83870200-1421179126_thumb.gif

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This is a pattern I've noticed over the last couple of years of tracking these things.  You usually see a decent ramp up in QPF starting 24-36 hours out and then a consistent drop-off as you close in.  Anyway, here's the latest radar.  Precip is "exploding" now to the right of the red wall.

 

attachicon.gifsoutheast.gif

 

Yeah, we are quibbling over .15" v/s .25" of precip...we suck.

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This is a pattern I've noticed over the last couple of years of tracking these things.  You usually see a decent ramp up in QPF starting 24-36 hours out and then a consistent drop-off as you close in.  Anyway, here's the latest radar.  Precip is "exploding" now to the right of the red wall.

 

attachicon.gifsoutheast.gif

 

 

Yeah, we are quibbling over .15" v/s .25" of precip...we suck.

 

 

Funny thing is if it was just regular rain it would probably be the opposite. So many times in Dec when we had all that rain it was more than forecasted and lasted longer.

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Off-topic, but pertains to this event....

 

Are there any good Twitter Accounts to follow for road conditions from Atlanta to Greensboro and US 29 to Charlottesville. I have to drive that way to get to my new job and I know there are going to be a few slick spots when I get up there around early afternoon. The worst of the ice looks to stay just east of Greensboro, but it's too close for comfort for me right now... :/

 

If I have to stop due to icy conditions, I'll try to post some great pics! :D

 

Thanks!

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Yeah, we are quibbling over .15" v/s .25" of precip...we suck.

SREF sucks anyway...there's always this one huge precip member or one dry as a bone member that throws everything off. I wish that model mean actually made any logical sense. When you have the ARW at 0.64" and the NMM at 0.15" there's a problem. I look at the SREF for timing, precip type changeovers, etc...but that's it...not for precip.

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...ARRIVAL OF COLD AIR TONIGHT DELAYED SEVERAL HOURS AND

PRECIPITATION AMOUNTS STILL UNCERTAIN...

LATEST SURFACE ANALYSIS SHOWS AN IMPRESSIVE 1043MB SURFACE HIGH

PRESSURE CENTER ELONGATES WEST TO EAST ACROSS THE GREAT LAKES. THIS

HIGH CENTER WILL BECOME CENTERED OVER THE NORTHEAST AND CONTINUE TO

RIDGE SOUTH INTO THE PIEDMONT OF VIRGINIA AND THE CAROLINAS TONIGHT

AND INTO WEDNESDAY. THE SURGE OF ARCTIC AIR HAS ALREADY REACHED

CENTRAL VIRGINIA WITH DEW POINTS NOW IN THE TEENS AS FAR SOUTH AS

RICHMOND. MEANWHILE A SOUTHERN STREAM SHORT WAVE TROUGH ASSOCIATED

WITH A 120 KT JET AT 250 MB IS EASILY SEEN ON WATER VAPOR IMAGERY

MOVING ACROSS THE LOWER MISSISSIPPI RIVER VALLEY.

AS THE HIGH PRESSURE BUILDS IN THE REGION...A COLDER AND DRIER AIR

MASS WILL PUSH SOUTH INTO CENTRAL NC THIS EVENING AND OVERNIGHT.

HOWEVER....RECENT MODEL GUIDANCE HAS GENERALLY TRENDED WARMER AND

MORE DELAYED WITH DROP OF SURFACE TEMPERATURES BELOW

FREEZING...ESPECIALLY ACROSS LOCATIONS NEAR THE SOUTH CAROLINA

BORDER AND ACROSS THE SOUTHERN AND CENTRAL COASTAL PLAIN.

TEMPERATURES ARE NOT EXPECTED TO FALL BELOW FREEZING NEAR THE

VIRGINIA BORDER UNTIL BETWEEN 7 AND 9 PM...IN THE TRIAD BETWEEN 8

AND 10 PM...THE TRIANGLE BETWEEN 9PM AND 12 AM AND IN THE GOLDSBORO

AND FAYETTEVILLE AREA UNTIL 12AM TO 4AM. IN FACT...SOUTHEAST

PORTIONS OF THE SAMPSON...CUMBERLAN AND WAYNE COUNTIES WILL ONLY

FALL TO FREEZING 31/32 DEGREES WHICH WILL LIMIT ICING TO JUST A

GLAZE IN ELEVATED LOCATIONS. TEMPERATURES WIL GENERALLY BOTTOM OUT

BETWEEN 4 AND 8AM AND THEN BEGIN TO RISE ON WEDNESDAY MORNING.

WHILE WE ARE MORE CONFIDENT IN THE TEMPERATURE TREND...THE

DISTRIBUTION OF PRECIPITATION IS STILL UNCERTAIN. IN GENERAL

GUIDANCE RANGES FROM THE DRIER GFS AND THE PARALLEL GFS WHICH DROPS

LESS THAN 0.05 INCHES AFTER 00Z AT GSO AND RDU...THE SREF MEAN WHICH

PRODUCES .11 AT GSO AND .40 AT RDU AND THE NAM WHICH PROVIDES 0.17

AT GSO AND .34 AT RDU. THE QPF AMOUNTS INCREASE TO THE SOUTH AND

EAST WITH FAYETTEVILLE FORECAST TO TO GET 0.28 FROM THE GFS..0.49

FROM THE SREF MEAN TO 0.60 FROM THE NAM. GUIDANCE GENERALLY

INDICATES INCREASED AMOUNTS FROM NW TO SE WITH A INLAND MAXIMUM

SETTING IN A REGION OF FAVORED ISENTROPIC LIFT FROM NEAR FAY TO RWI

TO ECG. RECENT RADAR TRENDS SEEM TO BE UNDERPERFORMING GUIDANCE

ACROSS THE GULF COAST REGION AND SAVANNAH RIVER VALLEY. GIVEN THE

PATTERN OF A PROGRESSIVE WAVE WITH RATHER SHALLOW SATURATION AND

ISENTROPIC LIFT...WOULD FAVOR THE MEAN OR LIGHTER PRECIPITATION

AMOUNTS. HAVE ACCORDINGLY INCLUDED STORM TOTAL PRECIPITATION AMOUNTS

OF AROUND 0.07 AT GSO TO .23 AT RDU TO .42 AT FAY AN GSB.

THE PTYPE WILL BE LARGELY DRIVEN BY BOUNDARY LAYER TEMPERATURES WITH

RAIN CHANGING FROM FREEZING RAIN FROM NORTH TO SOUTH THIS EVENING.

SOME SLEET WILL MIX IN AT TIMES BUT IT WILL NOT BE THE PREDOMINATE

PTYPE AND WILL GENERALLY BE CONFINE TO LOCATIONS NEAR AND NORTH OF

US ROUTE 1. FREEZING RAIN ACCUMULATIONS WILL BE MAXIMIZED BETWEEN

0.10 TO 0.20 INCHES IN A REGION STRETCHING FROM AROUND SANFORD TO

NEAR AND EAST OF RALEIGH TO NASHVILLE. LESSER AMOUNTS...GENERALLY

AROUND A TENTH OF AN INCH ARE LIKELY ACROSS MOST OF THE REMAINDER OF

CENTRAL NC EXCEPT REDUCED AMOUNTS IN THE TRIAD WHERE QPF WILL BE

LOWER BUT SFC TEMPS WILL BE SUPPORTIVE OF MORE EFFICIENT FREEZING.

ACROSS THE SOUTHERN COASTAL PLAIN AND SANDHILLS...FROM FAYETTEVILLE

SOUTH AND EAST THE TARDY ARRIVAL OF THE COLD AIR AND THE FACT IT

WILL LINGER RIGHT AROUND THE FREEZING.MELTING TEMPERATURE SHOULD

KEEP AMOUNTS LIMITED AND MAINLY CONFINED TO ELEVATED SURFACES.

TEMPERATURES WILL WARM ABOVE FREEZING FROM SOUTH TO NORTH DURING THE

LATE MORNING HOURS WITH ALL OF CENTRAL NC ABOVE FREEZING AFTER NOON.

THE PRECIPITATION SHOULD DIMINISH FROM WEST O EAST ON WEDNESDAY

MORNING WITH JUST CLOUDY SKIES DURING THE LATE AFTERNOON. HIGHS

SHOULD PEAK IN THE 35 TO 41 RANGE FROM NORTHEAST TO SOUTHWEST.

-BLAES

&&

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Important highlights of the RAH AFD:

 

ARRIVAL OF COLD AIR TONIGHT DELAYED SEVERAL HOURS

 

RECENT RADAR TRENDS SEEM TO BE UNDERPERFORMING GUIDANCE

 

WOULD FAVOR THE MEAN OR LIGHTER PRECIPITATION AMOUNTS

 

Typical winter weather event in NC.

 

Edit:  But, at least it's something.  It's going to turn out about how I thought it would a few days ago, although I was hoping it would trend more substantially.

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Thats not gonna go over well here lol......lets hope the recent model guidance is screwed and misreading the strength and depth of the wedge.....

 

Yeah, not likely at this point.  Temp still at 38 with the dew point increasing to 31 at RDU.  Not trending in the right direction.  I know colder/drier air is working in.  But it's always delayed it seems.  Oh well.  At least the LR is looking brighter...for today.

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WWA Text:

 

...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO
NOON EST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A WINTER
WEATHER ADVISORY FOR FREEZING RAIN AND SLEET...WHICH IS IN EFFECT
FROM 7 PM THIS EVENING TO NOON EST WEDNESDAY. THE WINTER STORM
WATCH IS NO LONGER IN EFFECT.

* LOCATIONS...COASTAL PLAIN...NORTHERN SANDHILLS AND EASTERN
  PIEDMONT...INCLUDING THE TRIANGLE AREA.

* HAZARD TYPES...FREEZING RAIN AND SLEET.

* ACCUMULATIONS...ONE TO TWO TENTHS OF AN INCH OF ICE.

* TIMING...THIS EVENING THROUGH WEDNESDAY MORNING WITH THE MOST
  SIGNIFICANT PRECIPITATION FALLING BETWEEN 1000 PM AND 400 AM.

* IMPACTS...DANGEROUS TRAVEL CONDITIONS AND SCATTERED POWER
  OUTAGES.

* TEMPERATURES...IN THE UPPER 20S TO LOWER 30S.

* WINDS...NORTH 10 TO 15 MPH WITH GUSTS UP TO 20 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF FREEZING RAIN AND
SLEET WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY
ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

&&
 

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