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Potential flooding rains next week?


tombo82685

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Without you getting into trouble with the PGA Tour, are you saying you believe the models may be too far west??

Yeah they may too far west, I always worry about the fall line being the flash or ignition point. Even if they are correct the headwaters of the Schuylkill and Lehigh come into play and we have to think about Cecil County with the Susquehanna. The PGA Tour told me not to play scheduled tour stop courses anymore, they say I'm doing too much damage to the rough.

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Yeah they may too far west, I always worry about the fall line being the flash or ignition point. Even if they are correct the headwaters of the Schuylkill and Lehigh come into play and we have to think about Cecil County with the Susquehanna. The PGA Tour told me not to play scheduled tour stop courses anymore, they say I'm doing too much damage to the rough.

having seen you play, I agree that the fairways should be safe. :whistle:

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all depends where the front sets up. Obviously the further west the drier it will be.

There will be decent fetch of tropical moisture off the Atlantic. We might be more hit/miss scattered showers/storms but it won't be like Central/Western PA.

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Looks like NJ, especially western / NW NJ will be riding the line between excessive rainfal and just a good drenching between now and Thursday while central and much of eastern PA are in the qpf bullseye. At least that is what most model data and current sat and radar suggest. Of course when dealing with a stalling front and possibly even a retrograding one its always tricky to pinpoint those cut off areas exactly. Also the secondary effects of Katia passing well east off us but perhaps beiing in or near a western subsidence zone need to be considered. Obviously flood risk is extremely elevated per past months rains so going to be dicy for many.

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Let's see if the NWS disco agrees with my previous thoughts at all. From State College

SHORT TERM /TUESDAY/...

THINGS START TO GET INTERESTING TUESDAY AS THE SHORT RANGE MODELS

START HINTING AT THE BEGINNINGS OF AN EXCESSIVE RAIN EVENT. THE

DEEP GR LAKES TROF DRAGS THE REMNANTS OF LEE NORTHEASTWARD AND

FUNNELS THINGS RIGHT INTO PA OVER THE ENSUING COUPLE OF DAYS.

OPERATIONAL NAM/GFS GIVE CUMULATIVE QPF AMOUNTS OF 6-13 INCHES

OVER A WIDE AREA BETWEEN TUES AND THURS. COORD WITH HPC SHOWS 6+

INCH QPF BETWEEN TUES AM AND WED EVE.

GEFS SHOWS A SURGE OF ANOMALOUS PWAT...+1-3 STD DEV BEGINNING TO

MOVE IN LATER IN THE DAY TUES. BIGGEST HEAVY RAIN THREAT SEEMS TO

BE LINING UP FOR LATER TUESDAY AND POSSIBLY LASTING INTO THURS.

GEFS SHOWS A GREATER THAN 60 PERCENT CHANCE OF 48 HR RAINFALLS OF

AT LEAST 4 INCHES FOR MUCH OF THE AREA THRU WED NIGHT AS A DEEP

ANOMALOUS EASTERLY FLOW GETS REPLACED BY AN ANOMALOUS SSE FLOW.

RAINFALL AMOUNTS LIKE WHAT ARE BEING OUTPUT IN THE GUIDANCE WOULD

LEAD TO SOME PRETTY SERIOUS FLOODING OVER MUCH OF THE AREA.

MAX TEMPS TUESDAY WILL BE 15F OR SO BELOW NORMAL AS THE MUCH

COOLER CANADIAN AIRMASS...BATTLES WITH THE EXTENSIVE PLUME OF

TROPICAL MOISTURE JUST TO OUR SOUTH.

&&

.LONG TERM /TUESDAY NIGHT THROUGH MONDAY/...

00Z NAM/GFS AND EC ALL INDICATE A VERY RAINY PERIOD ON TAP FOR

WEDNESDAY THROUGH THURSDAY MORNING...WITH SOME MINOR VARIATIONS IN

PLACEMENT OF THE AXIS OF HEAVIEST RAINFALL.

AT THE BEGINNING OF THIS PERIOD...THE SREF CONTAINS U-WIND

ANOMALIES OF ABOUT -3 ST DEVIATIONS WHILE THE V-WIND ANOMALY IS A

HEFTY PLUS 3-4 AIMED RIGHT INTO CENTRAL PENN.

RAINFALL DURING THE 24-36 HOURS THROUGH 16Z THURSDAY COULD TOP 4

OR 5 INCHES ACROSS CENTRAL AND EASTERN PENN AS ELEVATED

INSTABILITY AND 2-3 STANDARD DEVIATION PWAT AIR /OF APPROX

45-50MM/ IS TRANSPORTED NNWD FROM THE MID ATLANTIC COASTAL PLAIN

VIA THE PERSISTENT ANOMALOUS LLVL FLOW. DEEP UVVEL BENEATH THE

RIGHT ENTRANCE REGION OF A 90 KT JET TO OUR NORTH WILL COMBINE

WITH THESE AFOREMENTIONED FACTORS TO CREATE A VERY EFFICIENT RAIN-

MAKING MACHINE.

WILL BE WAITING AT LEAST FEW MORE MODEL CYCLES TO EXAMINE TRENDS

OF THE HEAVIEST PRECIP AXIS BEFORE HOISTING ANY ADDITIONAL FLAGS

FOR FLOODING/FLASH FLOODING.

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220 is from Altoona to Williamsport, so you must see that as the axis for heaviest rain, with quantities falling off 75 miles either side? I can buy that based on radar. Interested in seeing what Mt Holly says in the next disco.

http://kamala.cod.edu/pa/latest.fxus61.KPHI.html

BTW, I think we still have a shot at localized flash flooding on Wed/Thu and some spots could end up with 3-4" before we're all done but that's more localized in nature and less widespread.

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http://kamala.cod.ed...xus61.KPHI.html

BTW, I think we still have a shot at localized flash flooding on Wed/Thu and some spots could end up with 3-4" before we're all done but that's more localized in nature and less widespread.

Thanks for the disco. I'm sure Mt Holly is right, but I'm not seeing that front move a whole helluva lot. I wonder if it ever clears the FA.

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