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July Medium/ Long Range


Weather Will
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49 minutes ago, Weather Will said:

WB 18Z 3K NAM has thunderstorms by midnight on the 4th in DC.

IMG_0271.png

 

Mount Holly has increased the rainfall probabilities for Saturday eve/night.  

 

SPC has highlighted much of our area in a Slight Risk (level 2
out of 5) for severe thunderstorms both Friday and Saturday. As
indicated by the PoP forecast above, coverage of storms is
anticipated to be relatively low on Friday, mainly isolated to
scattered in nature at best. Coverage and organization of storms
should be a bit greater on Saturday though. Damaging winds will
be the main threat with any thunderstorm development. On
Sunday, the severe weather threat may begin to become confined
mainly to Delmarva where destabilization is greatest ahead of an
approaching cold front. With that being said, the entire area
could see showers and a few storms. SPC has highlighted this
area with a day 4 15% severe risk.

 

 

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Watching with some concern about the "mother of all heat domes" across the Western U.S. in 10-12 days ... triggered by Super Typhoon Bavi. This would be unprecedented ridge strength at 6045 meters (500 mb height) Nobody has seen this before

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"Mega Typhoon Bavi" Super Typhoon Bavi has an opportunity in the coming 4-5 days to set the "world record" for the most intense tropical cyclone observed, since Tip in 1979. ECMWF HRES (00z) at 872 mb --> upper echelon of Earth's maximum potential intensity.

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693
FXUS61 KPHI 031900
AFDPHI

Area Forecast Discussion
National Weather Service Mount Holly NJ
300 PM EDT Fri Jul 3 2026

.WHAT HAS CHANGED...
Confidence has increased in potential flash flooding impacts
across portions of the area on Sunday and Monday. Otherwise, the
forecast remains in track.

Concern has grown this afternoon that a threat for flash
flooding could evolve Sunday into Monday, given a slow moving or
stationary frontal boundary draped across the area, and tall,
skinny CAPE profiles with deep moisture. In fact, model guidance
is indicating PWATs potentially exceeding 2 inches, which is
above the 90th percentile for this time of year and near the
daily observed maximum. Given these factors, rainfall rates in
storms could exceed 1 to 2 inches per hour. As of now, the WPC
has placed a Slight Risk (2 of 4) for the I-95 corridor and
points west both Sunday and Monday, with a Marginal Risk (1 of
4) for the remainder of the area.

The front is expected to finally clear the area Tuesday, with
high pressure at least briefly building back into the region.
However, daily chances for isolated, primarily diurnally driven
convection, could continue through the middle of next week.

 
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1 hour ago, pazzo83 said:

folks are starting to chirp about a death ridge out west.

extreme 

https://x.com/WorldClimateSvc/status/2073150197807329431

 

These extreme deterministic solutions are eye-catching. For reference, the ERA5 record highest 500mb height over the CONUS is 6027 gpm (21 Aug 2023). As of today's 12Z runs, the following percentage of members exceed this: WeatherNext2 23% AIFS-ENS 12% IFS-ENS 12% GEFS 19%
 
 

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