tarheelwx Posted February 19, 2013 Share Posted February 19, 2013 The majority show ridging in the west with blocking, good enough for 9-10 days out. The ENS mean is reasonable. So I take it they're not really cold , but cold enough for winter precip outside of the mountains? Thanks. TW Link to comment Share on other sites More sharing options...
SnowNiner Posted February 19, 2013 Share Posted February 19, 2013 Well, I think it's safe enough to say there's going to be a storm at that time period. I feel confident about that. As mentioned though, is there going to be enough cold in March? Going to have a nice -NAO and from below it looks like the PNA spikes positive right around this time as well. +PNA and -NAO. This is what we've been waiting for. I'm very skeptical on the temps though. I've never seen them good and cold in March IMBY. Snow yes, but melt as it hits snow for the most part. If it doesn't happen here though, I think we're done. Probably the best set up this winter. The SE's last stand!! Link to comment Share on other sites More sharing options...
packbacker Posted February 19, 2013 Share Posted February 19, 2013 So I take it they're not really cold , but cold enough for winter precip outside of the mountains? Thanks. TW Correct, not crazy cold, but if we get a strong enough storm with a good track it will be cold enough for snow, outside of the mountains, IMO.... Link to comment Share on other sites More sharing options...
Lookout Posted February 19, 2013 Share Posted February 19, 2013 Meh. It's actually been about the same up here. I had a slushy quarter inch of snow a couple of weeks ago and a very light glaze of freezing rain. Officially the airport hasn't recorded any accumulation of any sort this Winter. Chattanooga almost always gets screwed.Bob can verify that....but you still have gotten more than me I was mainly referring to the rest of tn. It's pretty rare for eastern tn to get any freezing rain due to waa out of ahead of systems....which goes to show you how crappy this winter has been for some of us. Plus I'm pretty sure they have gotten some snow Link to comment Share on other sites More sharing options...
NGaWxNerd Posted February 19, 2013 Share Posted February 19, 2013 Well, I think it's safe enough to say there's going to be a storm at that time period. I feel confident about that. As mentioned though, is there going to be enough cold in March? Going to have a nice -NAO and from below it looks like the PNA spikes positive right around this time as well. +PNA and -NAO. This is what we've been waiting for. I'm very skeptical on the temps though. I've never seen them good and cold in March IMBY. Snow yes, but melt as it hits snow for the most part. If it doesn't happen here though, I think we're done. Probably the best set up this winter. The SE's last stand!! We can name this storm "The Alamo" for the thread. Disclaimer: This is not a suggestion we start a thread. Link to comment Share on other sites More sharing options...
burgertime Posted February 19, 2013 Share Posted February 19, 2013 Euro is close to something @216 but it spins up a Miller B it looks like. Actually has a 996 low around TN. Link to comment Share on other sites More sharing options...
packbacker Posted February 19, 2013 Share Posted February 19, 2013 The Euro has a storm, but the blocking is more east based so it's an Apps runner. The storm that pounds Kanas/Nebraska creates a big 50/50 low, but it's not at 50/50, looks farther east. Link to comment Share on other sites More sharing options...
burgertime Posted February 19, 2013 Share Posted February 19, 2013 Euro is a head scratcher. Bombs out a huge storm in the OV possibly some back end snow for parts of WNC. Link to comment Share on other sites More sharing options...
franklin NCwx Posted February 19, 2013 Share Posted February 19, 2013 986 over crossville. How much for Nashville? Link to comment Share on other sites More sharing options...
Poimen Posted February 19, 2013 Share Posted February 19, 2013 The EURO is further west with the GL cutoff (compared to GFS), thus the day 8-9 miller A ends up as an Apps runner. Link to comment Share on other sites More sharing options...
burgertime Posted February 19, 2013 Share Posted February 19, 2013 986 over crossville. How much for Nashville? Looks like it would be close to an inch all snow for BNA. Link to comment Share on other sites More sharing options...
Cold Rain Posted February 19, 2013 Share Posted February 19, 2013 Euro is a head scratcher. Bombs out a huge storm in the OV possibly some back end snow for parts of WNC. Sounds like it's very much in line with winter so far. Too far west? Maybe, but until we see solid, conclusive evidence of a true west-based -NAO, aligned with a positive, or at least neutral PNA, in the near term, there is no reason at all to expect a Miller A tracking up the coast....outside of a long-shot anomalous event. Link to comment Share on other sites More sharing options...
packbacker Posted February 19, 2013 Share Posted February 19, 2013 Sounds like it's very much in line with winter so far. Too far west? Maybe, but until we see solid, conclusive evidence of a true west-based -NAO, aligned with a positive, or at least neutral PNA, in the near term, there is no reason at all to expect a Miller A tracking up the coast....outside of a long-shot anomalous event. But good news, is it looks like a great chance for a winter storm around that time frame, whether it's an App's runner, miller B transfer over the MA and slams the NE or if it's a true miller A. You know what I think is going to happen..... Link to comment Share on other sites More sharing options...
SnowNiner Posted February 19, 2013 Share Posted February 19, 2013 Sounds like it's very much in line with winter so far. Too far west? Maybe, but until we see solid, conclusive evidence of a true west-based -NAO, aligned with a positive, or at least neutral PNA, in the near term, there is no reason at all to expect a Miller A tracking up the coast....outside of a long-shot anomalous event. Very early, but you may be right...bet the streak. We'll see what the EURO holds in a few days. But to me, GFS is the model this winter; especially on long range patterns. I'll hug it on the west based NAO until it loses it. It's had it for several days now I think. If the EURO picks up on the blocking, the storm will go back Miller A southern route IMO. I just hope the GFS stays on its game. Besides, this is GaWx's storm he's been calling for since December. It's gotta happen! Link to comment Share on other sites More sharing options...
Southern Track Posted February 19, 2013 Share Posted February 19, 2013 The ensembles have shown a consistent -NAO and +PNA for a while at that time frame. The Euro made a huge jump in the right direction from the 0z run. The 0z had the low over Ohio at the same time. Link to comment Share on other sites More sharing options...
tnweathernut Posted February 19, 2013 Share Posted February 19, 2013 I know it's a 10 day map, but the one behind the leader looks nice too, nice ridging on the west coast, a closed low in the southwest with nowhere to go except east. Perhaps a couple of opportunities before we break into spring. Link to comment Share on other sites More sharing options...
Cold Rain Posted February 19, 2013 Share Posted February 19, 2013 But good news, is it looks like a great chance for a winter storm around that time frame, whether it's an App's runner, miller B transfer over the MA and slams the NE or if it's a true miller A. You know what I think is going to happen..... Yup....whether it's us or not, there's a decent chance for a Doozy around that time! I'd still love to get some of that colder air on the other side of the universe over here before winter's out, though. Anyway, here's hoping. Link to comment Share on other sites More sharing options...
Cold Rain Posted February 19, 2013 Share Posted February 19, 2013 Very early, but you may be right...bet the streak. We'll see what the EURO holds in a few days. But to me, GFS is the model this winter; especially on long range patterns. I'll hug it on the west based NAO until it loses it. It's had it for several days now I think. If the EURO picks up on the blocking, the storm will go back Miller A southern route IMO. I just hope the GFS stays on its game. Besides, this is GaWx's storm he's been calling for since December. It's gotta happen! Yeah, it feels like the GFS has done as good a job as anything else this year. But that pesky -NAO seems to keep being a mirage in the LR. Maybe it's the real deal this time. You'd have to think we'll eventually see one of those in our lifetime again, right? On another note, there's a fairly good CAD look at 168 on the Euro....better than the one this week, IMO. I'm only looking at the PSU eWall maps, so surface temps/precip may be no bueno. But although the 1032 HP in SE Canada is a little too far north for my liking, there's good ridging and good moisture at H7 and H85. And there's plenty of room for trending.... Link to comment Share on other sites More sharing options...
packbacker Posted February 19, 2013 Share Posted February 19, 2013 Yup....whether it's us or not, there's a decent chance for a Doozy around that time! I'd still love to get some of that colder air on the other side of the universe over here before winter's out, though. Anyway, here's hoping. That would make things to easy :-) Nothing is easy when it comes to snow in the SE. Link to comment Share on other sites More sharing options...
packbacker Posted February 19, 2013 Share Posted February 19, 2013 The analogs for day 10+ on the GFS are just crazy...on SV it has the following analogs... Every analog +/- 5 days or so had a big winter storm for the area, some historic and some more than one. 2/22/1960 (historic early March winter storms in the SE) 3/18/1981 (big winter storm for GSO and points west) 2/13/1978 (big winter storm for NC) 2/18/2010 (enough said) 3/3/1962 (big winter storm for NC) Link to comment Share on other sites More sharing options...
packfan98 Posted February 19, 2013 Share Posted February 19, 2013 Afternoon discussion from Raleigh NWS: FOR THURSDAY NIGHT/FRIDAY: GFS/ECMWF HAVE BEEN FAIRLY CONSISTENT INTHIS PERIOD WITH THE PRECIP PATTERN AND TIMING... ALTHOUGH THERE HASBEEN A SLIGHT TREND TO THE SE OF THE MIDWEST SURFACE/MID LEVEL LOWS.THE ECMWF`S LOW LEVEL THICKNESSES HAVE TRENDED COLDER IN THE WEDGEREGION FOR FRIDAY MORNING... ALTHOUGH THE NAM/GFS HAVE BEEN MORECONSISTENT WITH THESE. MODEL-INDICATED SURFACE WET BULB TEMPS ANDPARTIAL THICKNESSES BOTH SUGGEST LIGHT FREEZING RAIN (AND BRIEFLIGHT SLEET) AT THE ONSET... PRIMARILY ALONG/NORTH OF HIGHWAY 64LATE THURSDAY NIGHT INTO FRIDAY MORNING... TRENDING TO ALL LIGHTFREEZING RAIN THEN LIGHT FREEZING DRIZZLE AS THE ICE NUCLEATIONREGION ALOFT DRIES OUT DURING FRIDAY. HOWEVER... THE NAM HAS NOTABLYMORE QPF THAN THE GFS/ECMWF (DUE TO MUCH STRONGER 850 MBCONVERGENCE) THROUGH FRIDAY AND DOES NOT DRY OUT THE UPPER LEVELSUNTIL LATE AFTERNOON... WHICH DOES NOT HAVE SUPPORT FROM THEGFS/ECMWF. THESE TWO MODELS DEPICT BETTER UPPER DIVERGENCE AS WELLAS NEGATIVE LIFTED INDICES OVER THE GULF COAST ON FRIDAY...SUGGESTING THAT THE HEAVIEST RAINFALL WILL HOLD TO OUR SOUTH ALONG ACONVECTIVE BAND MOVING ALONG AND SOUTH OF THE FRONT... A SCENARIOFURTHER SUPPORTED BY THE SREF`S VERY LOW PROBABILITIES (UNDER 50%)OF A TENTH INCH OR MORE. IN SHORT... EXPECT HIGH POPS BUT WITHMODEST QPF. PRECIP SHOULD NOT BE HEAVY ENOUGH FOR ANYTHING MORE THANA THIN GLAZE AT MOST... ALTHOUGH MUCH WILL DEPEND ON SURFACECONDITIONS AND PRECEDING TEMPS... IMPOSSIBLE TO SPECIFY AT THIS TIMERANGE. AT MOST... WE WOULD LIKELY SEE A LOW-END ADVISORY OVER THENRN AND WRN PIEDMONT. WE DO ANTICIPATE ESTABLISHMENT OF A STRONGDAMMING WEDGE THROUGH THE PIEDMONT LATE THURSDAY NIGHT AS THE DRYAIR RIDGE IS REINFORCED AND STABILIZED FURTHER BY NEAR-SURFACE WEAKCOOL AIR ADVECTION BENEATH INCREASING 850-800 MB WARM AIR ADVECTION.EXPECT TEMPS TO DROP QUICKLY IN THE EVENING WITH EVAPORATIVE COOLINGAS UPPER LEVEL (500-300 MB) ASCENT INDUCES VIRGA AND SLOW SATURATIONOF THE MID/LOWER LEVELS. READINGS SHOULD HOLD IN THE LOW-MID 30S FORTHE LATTER HALF OF THE NIGHT WITH GOOD RAIN CHANCES SPREADING INFROM THE WEST. ASCENT WILL DEEPEN FRIDAY MORNING AS THE 850 MB WARMFRONT (AND LEADING EDGE OF HIGHER THETA-E) SURGES NNE TOWARD NC.WHILE PRECIP CHANCES WILL BE HIGH... AMOUNTS WILL REMAIN RATHER LOWAND BE CONFINED LARGELY TO THE MORNING HOURS. FORECAST HIGHS FORFRIDAY HAVE BEEN BELOW STATISTICAL GUIDANCE FOR A FEW DAYS NOW...AND FINALLY GUIDANCE IS STARTING TO RESPOND TO THE WEDGE PATTERN.EXPECT HIGHS IN THE MID 30S TO THE MID 40S. Link to comment Share on other sites More sharing options...
SnowNiner Posted February 19, 2013 Share Posted February 19, 2013 The analogs for day 10+ on the GFS are just crazy...on SV it has the following analogs... Every analog +/- 5 days or so had a big winter storm for the area, some historic and some more than one. 2/22/1960 (historic early March winter storms in the SE) 3/18/1981 (big winter storm for GSO and points west) 2/13/1978 (big winter storm for NC) 2/18/2010 (enough said) 3/3/1962 (big winter storm for NC) Nice. I wonder if these analogs take in to account the cold being on the other side of the globe, or is it simply H5 pattern; anomolies? By the way, don sutherland has had some recent posts in the main page discussing snowier than average March for mid-atlantic and northeast. IMO, if mid atlantic is in the game, so are we. Especially if we can get a true Miller A. Link to comment Share on other sites More sharing options...
packbacker Posted February 19, 2013 Share Posted February 19, 2013 Nice. I wonder if these analogs take in to account the cold being on the other side of the globe, or is it simply H5 pattern; anomolies? By the way, don sutherland has had some recent posts in the main page discussing snowier than average March for mid-atlantic and northeast. IMO, if mid atlantic is in the game, so are we. Especially if we can get a true Miller A. Just the 500mb height anomalies, let's ignore the fact the cold is bottled up on the other side of the globe. We are going to need some dynamics to help and a moderate HP to help, but not impossible. And to be honest if it's not a big, dynamic storm I don't care if it snows, I just assume it not give us token flakes. Link to comment Share on other sites More sharing options...
SnowNiner Posted February 19, 2013 Share Posted February 19, 2013 Just the 500mb height anomalies, let's ignore the fact the cold is bottled up on the other side of the globe. We are going to need some dynamics to help and a moderate HP to help, but not impossible. And to be honest if it's not a big, dynamic storm I don't care if it snows, I just assume it not give us token flakes. Question, with higher pressure anomolies (blocking) progged in SE Canada, wouldn't you expect a high pressure in the area to help with cold transport? Or is the blocking and surface pressures not related? Link to comment Share on other sites More sharing options...
packbacker Posted February 19, 2013 Share Posted February 19, 2013 Question, with higher pressure anomolies (blocking) progged in SE Canada, wouldn't you expect a high pressure in the area to help with cold transport? Or is the blocking and surface pressures not related? Definitely, but with the northern stream still somewhat dominant a pesky low could get trapped over the lakes and cut off our cold air supply. Link to comment Share on other sites More sharing options...
tnweathernut Posted February 19, 2013 Share Posted February 19, 2013 I hear the euro control run is showing not one,not two, but three coastal's. Can anyone confirm any of them are any benefit to the southeast? Link to comment Share on other sites More sharing options...
packbacker Posted February 19, 2013 Share Posted February 19, 2013 I hear the euro control run is showing not one,not two, but three coastal's. Can anyone confirm any of them are any benefit to the southeast? Well 0z had a day 10 coastal and than a day 13/14 apps runner. The 12z EPS control is not out yet, I don't think it comes out until 5:30/6pm. Link to comment Share on other sites More sharing options...
FallsLake Posted February 19, 2013 Share Posted February 19, 2013 The CAD is coming! RAH afternoon discussion states the chances of wintery precip is increasing but the amounts should be low (~.1). .SHORT TERM /THURSDAY THROUGH SATURDAY NIGHT/...AS OF 230 PM TUESDAY...DAMP/COOL/CLOUDY WEATHER FOR LATE WEEK.FOR THURSDAY: A LONGITUDINALLY EXPANSIVE RIDGE CENTERED OVERSOUTHERN BAFFIN ISLAND WILL CONTINUE TO EXTEND SOUTHWARD THROUGH THEGREAT LAKES INTO CENTRAL/ERN NC. THE MID LEVEL RIDGE WILL DRIFT TOTHE GREAT LAKES THROUGH SOUTHEAST STATES WHILE THE VORTEX NOW OFFOREGON ROTATES UP THROUGH NM/KS/NE... AND THE LOW-MID LEVELS WILLREMAIN GENERALLY DRY AND STABLE... ALTHOUGH HIGH LEVEL MOISTURE WILLINCREASE WITH STRENGTHENING JET-LEVEL WINDS ACROSS THE CENTRAL MISSVALLEY (OK/MO/SRN IL/SRN IN) AS WELL AS OFF THE MIDATLANTIC COAST...AND RESULTING INCREASING UPPER DIVERGENCE FROM THE MIDWEST THROUGHTHE OHIO VALLEY TO THE SRN APPALACHIANS. THICKNESSES ABOUT 10-15METERS BELOW NORMAL COMBINED WITH THICKENING HIGH CLOUDS AND ASHALLOW MIXED LAYER ALL SUPPORT HIGHS OF 47-54.FOR THURSDAY NIGHT/FRIDAY: GFS/ECMWF HAVE BEEN FAIRLY CONSISTENT INTHIS PERIOD WITH THE PRECIP PATTERN AND TIMING... ALTHOUGH THERE HASBEEN A SLIGHT TREND TO THE SE OF THE MIDWEST SURFACE/MID LEVEL LOWS.THE ECMWF`S LOW LEVEL THICKNESSES HAVE TRENDED COLDER IN THE WEDGEREGION FOR FRIDAY MORNING... ALTHOUGH THE NAM/GFS HAVE BEEN MORECONSISTENT WITH THESE. MODEL-INDICATED SURFACE WET BULB TEMPS ANDPARTIAL THICKNESSES BOTH SUGGEST LIGHT FREEZING RAIN (AND BRIEFLIGHT SLEET) AT THE ONSET... PRIMARILY ALONG/NORTH OF HIGHWAY 64LATE THURSDAY NIGHT INTO FRIDAY MORNING... TRENDING TO ALL LIGHTFREEZING RAIN THEN LIGHT FREEZING DRIZZLE AS THE ICE NUCLEATIONREGION ALOFT DRIES OUT DURING FRIDAY. HOWEVER... THE NAM HAS NOTABLYMORE QPF THAN THE GFS/ECMWF (DUE TO MUCH STRONGER 850 MBCONVERGENCE) THROUGH FRIDAY AND DOES NOT DRY OUT THE UPPER LEVELSUNTIL LATE AFTERNOON... WHICH DOES NOT HAVE SUPPORT FROM THEGFS/ECMWF. THESE TWO MODELS DEPICT BETTER UPPER DIVERGENCE AS WELLAS NEGATIVE LIFTED INDICES OVER THE GULF COAST ON FRIDAY...SUGGESTING THAT THE HEAVIEST RAINFALL WILL HOLD TO OUR SOUTH ALONG ACONVECTIVE BAND MOVING ALONG AND SOUTH OF THE FRONT... A SCENARIOFURTHER SUPPORTED BY THE SREF`S VERY LOW PROBABILITIES (UNDER 50%)OF A TENTH INCH OR MORE. IN SHORT... EXPECT HIGH POPS BUT WITHMODEST QPF. PRECIP SHOULD NOT BE HEAVY ENOUGH FOR ANYTHING MORE THANA THIN GLAZE AT MOST... ALTHOUGH MUCH WILL DEPEND ON SURFACECONDITIONS AND PRECEDING TEMPS... IMPOSSIBLE TO SPECIFY AT THIS TIMERANGE. AT MOST... WE WOULD LIKELY SEE A LOW-END ADVISORY OVER THENRN AND WRN PIEDMONT. WE DO ANTICIPATE ESTABLISHMENT OF A STRONGDAMMING WEDGE THROUGH THE PIEDMONT LATE THURSDAY NIGHT AS THE DRYAIR RIDGE IS REINFORCED AND STABILIZED FURTHER BY NEAR-SURFACE WEAKCOOL AIR ADVECTION BENEATH INCREASING 850-800 MB WARM AIR ADVECTION.EXPECT TEMPS TO DROP QUICKLY IN THE EVENING WITH EVAPORATIVE COOLINGAS UPPER LEVEL (500-300 MB) ASCENT INDUCES VIRGA AND SLOW SATURATIONOF THE MID/LOWER LEVELS. READINGS SHOULD HOLD IN THE LOW-MID 30S FORTHE LATTER HALF OF THE NIGHT WITH GOOD RAIN CHANCES SPREADING INFROM THE WEST. ASCENT WILL DEEPEN FRIDAY MORNING AS THE 850 MB WARMFRONT (AND LEADING EDGE OF HIGHER THETA-E) SURGES NNE TOWARD NC.WHILE PRECIP CHANCES WILL BE HIGH... AMOUNTS WILL REMAIN RATHER LOWAND BE CONFINED LARGELY TO THE MORNING HOURS. FORECAST HIGHS FORFRIDAY HAVE BEEN BELOW STATISTICAL GUIDANCE FOR A FEW DAYS NOW...AND FINALLY GUIDANCE IS STARTING TO RESPOND TO THE WEDGE PATTERN.EXPECT HIGHS IN THE MID 30S TO THE MID 40S.> > Link to comment Share on other sites More sharing options...
WilkesboroDude Posted February 19, 2013 Share Posted February 19, 2013 Best chances west or north of the Triad. Link to comment Share on other sites More sharing options...
Brick Tamland Posted February 19, 2013 Share Posted February 19, 2013 The CAD is coming! RAH afternoon discussion states the chances of wintery precip is increasing but the amounts should be low (~.1). .SHORT TERM /THURSDAY THROUGH SATURDAY NIGHT/... AS OF 230 PM TUESDAY... DAMP/COOL/CLOUDY WEATHER FOR LATE WEEK. FOR THURSDAY: A LONGITUDINALLY EXPANSIVE RIDGE CENTERED OVER SOUTHERN BAFFIN ISLAND WILL CONTINUE TO EXTEND SOUTHWARD THROUGH THE GREAT LAKES INTO CENTRAL/ERN NC. THE MID LEVEL RIDGE WILL DRIFT TO THE GREAT LAKES THROUGH SOUTHEAST STATES WHILE THE VORTEX NOW OFF OREGON ROTATES UP THROUGH NM/KS/NE... AND THE LOW-MID LEVELS WILL REMAIN GENERALLY DRY AND STABLE... ALTHOUGH HIGH LEVEL MOISTURE WILL INCREASE WITH STRENGTHENING JET-LEVEL WINDS ACROSS THE CENTRAL MISS VALLEY (OK/MO/SRN IL/SRN IN) AS WELL AS OFF THE MIDATLANTIC COAST... AND RESULTING INCREASING UPPER DIVERGENCE FROM THE MIDWEST THROUGH THE OHIO VALLEY TO THE SRN APPALACHIANS. THICKNESSES ABOUT 10-15 METERS BELOW NORMAL COMBINED WITH THICKENING HIGH CLOUDS AND A SHALLOW MIXED LAYER ALL SUPPORT HIGHS OF 47-54. FOR THURSDAY NIGHT/FRIDAY: GFS/ECMWF HAVE BEEN FAIRLY CONSISTENT IN THIS PERIOD WITH THE PRECIP PATTERN AND TIMING... ALTHOUGH THERE HAS BEEN A SLIGHT TREND TO THE SE OF THE MIDWEST SURFACE/MID LEVEL LOWS. THE ECMWF`S LOW LEVEL THICKNESSES HAVE TRENDED COLDER IN THE WEDGE REGION FOR FRIDAY MORNING... ALTHOUGH THE NAM/GFS HAVE BEEN MORE CONSISTENT WITH THESE. MODEL-INDICATED SURFACE WET BULB TEMPS AND PARTIAL THICKNESSES BOTH SUGGEST LIGHT FREEZING RAIN (AND BRIEF LIGHT SLEET) AT THE ONSET... PRIMARILY ALONG/NORTH OF HIGHWAY 64 LATE THURSDAY NIGHT INTO FRIDAY MORNING... TRENDING TO ALL LIGHT FREEZING RAIN THEN LIGHT FREEZING DRIZZLE AS THE ICE NUCLEATION REGION ALOFT DRIES OUT DURING FRIDAY. HOWEVER... THE NAM HAS NOTABLY MORE QPF THAN THE GFS/ECMWF (DUE TO MUCH STRONGER 850 MB CONVERGENCE) THROUGH FRIDAY AND DOES NOT DRY OUT THE UPPER LEVELS UNTIL LATE AFTERNOON... WHICH DOES NOT HAVE SUPPORT FROM THE GFS/ECMWF. THESE TWO MODELS DEPICT BETTER UPPER DIVERGENCE AS WELL AS NEGATIVE LIFTED INDICES OVER THE GULF COAST ON FRIDAY... SUGGESTING THAT THE HEAVIEST RAINFALL WILL HOLD TO OUR SOUTH ALONG A CONVECTIVE BAND MOVING ALONG AND SOUTH OF THE FRONT... A SCENARIO FURTHER SUPPORTED BY THE SREF`S VERY LOW PROBABILITIES (UNDER 50%) OF A TENTH INCH OR MORE. IN SHORT... EXPECT HIGH POPS BUT WITH MODEST QPF. PRECIP SHOULD NOT BE HEAVY ENOUGH FOR ANYTHING MORE THAN A THIN GLAZE AT MOST... ALTHOUGH MUCH WILL DEPEND ON SURFACE CONDITIONS AND PRECEDING TEMPS... IMPOSSIBLE TO SPECIFY AT THIS TIME RANGE. AT MOST... WE WOULD LIKELY SEE A LOW-END ADVISORY OVER THE NRN AND WRN PIEDMONT. WE DO ANTICIPATE ESTABLISHMENT OF A STRONG DAMMING WEDGE THROUGH THE PIEDMONT LATE THURSDAY NIGHT AS THE DRY AIR RIDGE IS REINFORCED AND STABILIZED FURTHER BY NEAR-SURFACE WEAK COOL AIR ADVECTION BENEATH INCREASING 850-800 MB WARM AIR ADVECTION. EXPECT TEMPS TO DROP QUICKLY IN THE EVENING WITH EVAPORATIVE COOLING AS UPPER LEVEL (500-300 MB) ASCENT INDUCES VIRGA AND SLOW SATURATION OF THE MID/LOWER LEVELS. READINGS SHOULD HOLD IN THE LOW-MID 30S FOR THE LATTER HALF OF THE NIGHT WITH GOOD RAIN CHANCES SPREADING IN FROM THE WEST. ASCENT WILL DEEPEN FRIDAY MORNING AS THE 850 MB WARM FRONT (AND LEADING EDGE OF HIGHER THETA-E) SURGES NNE TOWARD NC. WHILE PRECIP CHANCES WILL BE HIGH... AMOUNTS WILL REMAIN RATHER LOW AND BE CONFINED LARGELY TO THE MORNING HOURS. FORECAST HIGHS FOR FRIDAY HAVE BEEN BELOW STATISTICAL GUIDANCE FOR A FEW DAYS NOW... AND FINALLY GUIDANCE IS STARTING TO RESPOND TO THE WEDGE PATTERN. EXPECT HIGHS IN THE MID 30S TO THE MID 40S. > > Looks like it is trending with more precip and further south. This could get interesting Friday morning. Link to comment Share on other sites More sharing options...
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