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Cut Off Low obs and disco:


NaoPos

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:weenie: I don't know what you're seeing, but you must be hallucinating. Because there's no low anywhere near you.

Dont know about you, but 29.44 is the lowest i had here in 24 days...

Maybe check the tiltle of the thread first.

And what is this sittting over me?

http://www.spc.noaa....r.php?sector=16#

http://weather.unisys.com/images/sat_sfc_map_loop.php

:lightning:

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Dont know about you, but 29.44 is the lowest i had here in 24 days...

Maybe check the tiltle of the thread first.

And what is this sittting over me?

http://www.spc.noaa....r.php?sector=16#

http://weather.unisy...fc_map_loop.php

:lightning:

yea there is a low just your west, but thats not why your dry. If that was the case then places to your east would of been dry to. You were just not in the right spot to get the small pop up storms.

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Mt. Holly's 3am thoughts..

NEAR TERM /UNTIL 6 PM THIS EVENING/...

THE WRF-NMM INITIALIZATION AT 500MB WAS SLIGHTLY BETTER THAN THE GFS

WHILE THE GFS WAS BETTER THERMALLY AT 850MB. WHILE THE MODELS

CONTINUE TO HANDLE THE LARGE SCALE EVOLUTION SIMILARLY, THEY WAY

THEY TREAT THE SHORT WAVES ROTATING AROUND THE CLOSED LOW,THE

AMOUNT OF INSTABILITY VARIES AS DOES THE SUBTLE DIRECTIONALITY

DIFFERENCES. THUS THERE REMAINS SOME DIFFERENCES WITH RESPECT TO

QPF. WE WILL CONTINUE TO FOLLOW A MODEL COMPROMISE AND STEER AWAY

FROM INCLUDING THE CAN GGEM IN THE MIX AS PER PMDHMD.

OLD BOUNDARIES DON`T FADE EASILY AND WE ARE EXPECTING THAT TO BE THE

CASE TODAY AS THE LOW PRESSURE SYSTEM HAS EASED INTO DELMARVA,

SLIGHTLY FARTHER TO THE EAST THAN MODEL CONSENSUS YESTERDAY. THE

INVERTED TROF EXTENDING NORTHWARD SHOULD ACT AS A FOCUS FOR SHOWERS

AND TSRAS AS THE DAY PROGRESSES.

THERE ARE PLUSES AND MINUSES FOR PRECIPITATION CHANCES TODAY BEFORE

THE GREATER CONFIDENT AND WETTER PART OF THE FORECAST TAKE OVER. THE

HRRR ASIDE, THE OTHER MESOSCALE MODELS ARE NOT THAT BULLISH FOR

CONVECTION TODAY. PARTLY BECAUSE THEY ARE WRF-NMM DRIVEN AND THE

MODEL FORECAST DEW POINTS ARE LOWER. WE THINK THIS MAY BE A BIT TOO

DRY BASED ON CURRENT DEW POINTS. CONVERSELY THE GFS AND HRRR FCST

SFC DEW POINTS APPEAR A COUPLE OF DEGREES TOO HIGH. SO WE

MODIFIED OUR SOUNDING THE BEST WE COULD. WE WILL REACH THE

CONVECTIVE TEMP, BUT NOT UNTIL THE AFTERNOON. THUS ASIDE FROM SOME

LATE STRAGGLERS, WE HAVE CONFINED MOST OF THE MENTION OF PCPN TO

THE AFTERNOON AND FOLLOWED THE INVERTED TROF AXIS FOR HIGHEST

POPS.

SEVERE WISE THE DRY SLOT ALOFT WILL BE OVER US AND THE MODIFIED

SOUNDING SHOWED MORE DOWNDRAFT CAPE CAPABILITIES THAN IT DID FOR

SUNDAY. THE FORECAST CAPE THOUGH IS EXPECTED TO BE LESS THAN 1K

AND THE GREATEST LIMITING FACTOR WOULD BE THE FORECAST WIND FIELD

BELOW 700MB WHICH WILL BE MUCH WEAKER THAN SUNDAY. SO OUR THINKING

FWIW IS THAT WIND GUSTS MOST LIKELY TO MAX AROUND 35 MPH. A JET

STREAK ALOFT WILL ASSIST OUR PCPN CHANCES. AS FAR AS HEAVY RAIN

POTENTIAL GOES, THE DRY SLOT WILL WORK TO LOWER OUR PWATS TODAY

AND THINKING IS THIS SHOULD LIMIT EVENT TOTALS TO AN INCH OR LESS

MOST PLACES. FFG AND FFH GUIDANCE THRU 00Z WAS STILL FAIRLY HIGH

(1.5"/HR AT LOWEST). SO WHILE ANY ADDITIONAL RAIN WILL INCREASE OUR

VULNERABILITY DOWN THE ROAD, THE GAGED STREAMS SHOULD BE ABLE TO

HANDLE IT TODAY ASIDE FROM THE TYPICAL POOR DRAINAGE SPOTS.

BECAUSE THE GFS VERIFIED BETTER AT 850MB, WE LEANED OUR MAX TEMPS

TOWARD IT.

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I see some serious flooding if 5 inches of rain falls for the entire Mt. Holly forecast area, with special emphasis on the Schuylkill river basin. Another concern is that we will go into the summer season with huge amounts of standing water in our riparian areas. West Nile and a heavy mosquito population appears to be a serious problem for us this summer. Lastly, with the groundwater tables and soil moisture up, any early tropical storms that hit our region will be disastrous. With these antecedent conditions and the fact that we are having cutoff lows in our area remind me of the tropical storm Agnes situation where a tropical system merged with a mid- latitude low pressure storm and dumped up to 18 inches of rain in our area. This situation needs to be closely monitored over the next month.

lightning.gifpopcorn.gifgrampa.gifmaprain.gif

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Total rainfall over the past 36 hours: 0.82"

Yeah, I estimated a bit under an inch of rain in Spring Mount PA for this past weekend through 7 AM today. The lawn is getting high and I won't have a chance to mow it until at least Thursday (based on my work schedule)...and it remains to be seen if I'll get enough of a break in the rain showers on that day.

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