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July 2013 Observations and Discussions


bluewave

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We could see severe storms around the region later today as the upper low ejects

east into a very moist and unstable airmass with steeper mid level lapse rates

than we have experienced recently. Any thunderstorms could drop torrential

downpours with dews 72-75 and PW's approaching 2.00". The models are

currently hitting interior zones highest where the best shear is expected to be.

So will have to monitor the 12z guidance and radar trends for specifics.

 

attachicon.giflaps.gif

 

attachicon.gifgfsUS_500_avort_018.gif

 

We have decent shear and mid-level lapse rates. But the shortwave forcing doesn't arrive in our area, until late tonight and tomorrow morning.

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We have decent shear and mid-level lapse rates. But the shortwave forcing doesn't arrive in our area, until late tonight and tomorrow morning.

 

That's why the models have the highest POPs N and W later on.

 

 

 

 

 

 

 

 

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10am temps were almost identical to yesterday. I think we're on track for similar highs.

 

Probably 92F at KNYC, and 95F at EWR, around mid 90s for LGA.

 

This looks like it could be to close to the coolest max for NYC after a low of 80 since 1990. NYC is on track for 92-94

today which is below the coolest 80/95 split on 7-30-02. 7-10-93 is the highest at 80/102.

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This looks to be the coolest max for NYC after a low of 80 since 1990. NYC is on track for low

90's again today which is below the coolest 80/95 split on 7-30-02. 7-10-93 is the highest at 80/102.

 

 

Nice stat, and this confirms the point that the pattern is more "steam bath" than scorching, in contrast to the past few summers as jetski just pointed out.

 

Usually with min temps that high in NYC, we'd be looking at a mid/upper 90s day on tap. Dew points and wind direction are unfavorable for extreme heat. I think we might see one shot of extreme (95-100F) heat this summer but the best opportunity would be August.

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Nice stat, and this confirms the point that the pattern is more "steam bath" than scorching, in contrast to the past few summers as jetski just pointed out.

 

Usually with min temps that high in NYC, we'd be looking at a mid/upper 90s day on tap. Dew points and wind direction are unfavorable for extreme heat. I think we might see one shot of extreme (95-100F) heat this summer but the best opportunity would be August.

 

The tendency for lower heights over the Midwest hasn't allowed the extreme heat dome to build 

there and push into our area. The big 594 dm ridge is too far east this July compared to the last 

three years.

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11AM Roundup

 

TEB: 88

NYC: 86

EWR: 89

LGA: 89

JFK: 86

ISP: 87

New Bnswk: 89

TTN: 84

BLM: 88

ACY: 87

PHL: 87

12PM

 

TEB: 90

NYC: 90

EWR: 90

LGA: 91

JFK: 84

ISP: 85

New Bnswk: 89

TTN: 87

BLM: 90

ACY: 86

PHL: 86

 

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90/74, for a heat index of 99.  Seems like we've been in general or slight risk for a month; my backyard is just barely in the slight and I guess we're watching that line to the southwest.  Plenty of sun, hardly any cloud cover today.  Could support some good storms.

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spc is about ready to issue a new severe ww to the east/northeast of the current one..probably over eastern pa and new jersey where surface based cape is in excess of 4000 joules. its just a matter of waiting for the forcing to arrive.

 

that complex of storms could survive for a while if it doesnt outrun the best forcing.

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spc is about ready to issue a new severe ww to the east/northeast of the current one..probably over eastern pa and new jersey where surface based cape is in excess of 4000 joules. its just a matter of waiting for the forcing to arrive.

 

that complex of storms could survive for a while if it doesnt outrun the best forcing.

http://www.spc.noaa.gov/products/watch/ww0395.html

URGENT - IMMEDIATE BROADCAST REQUESTED   SEVERE THUNDERSTORM WATCH NUMBER 395   NWS STORM PREDICTION CENTER NORMAN OK   445 PM EDT SUN JUL 7 2013   THE NWS STORM PREDICTION CENTER HAS ISSUED A   * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF      EXTREME NORTHEAST MARYLAND     NORTHERN NEW JERSEY     SOUTHEAST NEW YORK     EASTERN PENNSYLVANIA   * EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 445 PM UNTIL     1000 PM EDT.   * PRIMARY THREATS INCLUDE...     SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES SOUTHWEST   OF WILKESBARRE PENNSYLVANIA TO 20 MILES EAST NORTHEAST OF   POUGHKEEPSIE NEW YORK.  FOR A COMPLETE DEPICTION OF THE WATCH SEE   THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).   PRECAUTIONARY/PREPAREDNESS ACTIONS...   REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE   FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH   AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR   THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS   AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY   DO PRODUCE TORNADOES.   &&   OTHER WATCH INFORMATION...CONTINUE...WW 394...   DISCUSSION...LINE OF THUNDERSTORMS OVER CENTRAL PA HAS BEEN   PRODUCING LOCALLY DAMAGING WINDS FOR PAST SEVERAL HOURS.  THESE   STORMS WILL TRAVERSE THE WATCH AREA THROUGH MID EVENING...WITH A   CONTINUED RISK OF STRONG WIND GUSTS ALONG THE LEADING EDGE.  SEVERE   THREAT SHOULD DIMINISH AFTER SUNSET.   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT   TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.   A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION   VECTOR 24035.   ...HART
NJ    .    NEW JERSEY COUNTIES INCLUDED ARE   BERGEN               EASTERN UNION       ESSEX                  HUNTERDON            MORRIS              PASSAIC                SOMERSET             SUSSEX              WARREN                 NYC027-071-079-087-105-111-119-080200-   /O.NEW.KWNS.SV.A.0395.130707T2045Z-130708T0200Z/   NY    .    NEW YORK COUNTIES INCLUDED ARE   DUTCHESS             ORANGE              PUTNAM                 ROCKLAND             SULLIVAN            ULSTER                 WESTCHESTER          
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I was under an excessive heat warning yesterday and today and it never made it above 91. I live to the west of phily, while in Newark nj they have been in the mid nineties with a heat advisory. Excessive heat warning does not make sense especially when you're talking 5 degrees above normal...lol!

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I was able to see the tops of the storms over the Hudson Valley and Orange County all the way down here on the south shore. Very impressive anvil tops for a time.

 

Yeah Considering its presentation on radar I was quite surprised of its lack of precip.. The storm was pretty much over head for about 30 mins too..

 

Rain today = 0.02"      Lets see what this bowing line of storms can produce later on..

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I was under an excessive heat warning yesterday and today and it never made it above 91. I live to the west of phily, while in Newark nj they have been in the mid nineties with a heat advisory. Excessive heat warning does not make sense especially when you're talking 5 degrees above normal...lol!

They don't issue a heat warning for the temp but for the possible heat index. That was expected to be in upper 90s to lower 100s.

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