Philadelphia Weekend Weather & Storm Forecasts

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Philadelphia Area Weather Forecasts

TUESDAY FORECAST

Monday, April 27, 2020 10:36 pm GFS

High pressure builds in for Tuesday.  Sunny, some clouds at times, High temperature 61.6° sd 1.6°.

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Location of main forecast data point on map of Philadelphia region
These forecasts (temp, rain/snow, etc) are based on the weather model data for the location represented by the "X"— data specific to the weather model grid point: Wings Field, Blue Bell (KLOM) Montgomery County, PA. This data point is more central to the Philadelphia area at large than Philadelphia Airport (KPHL).

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BillyPenn.com Interviews theweatherguy (2018)

Philadelphia Magazine Interview (2016)

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Definitions, Acronyms & Links

QPF: “Quantity of Precipitation Forecast”- given in inches, it’s the amount of water predicted to fall as measured in a rain gauge. For snowfall in inches, multiply the QPF by a factor of 10 – 15 (dependent upon temperature)

RRFS: Rapid Refresh Forecast System

REFS: Rapid Ensemble Forecast System

NAM: North American Mesoscale Model

NAM-NEST: North American Mesoscale Model Nested Grid (High Resolution)

GFS: Global Forecast System Model

GEFS: Global Ensemble Forecast System

WRF: Weather Research Forecast Model

HRRR: High Resolution Rapid Refresh Model

RAP: Rapid Refresh Model

MOS: Model Output Statistics

NBM: National Blend of Models

NAM FOUS: NAM Forecast Output Statistics

CMC GDPS:  Canadian Meteorological Center Global Deterministic Prediction System

CMC HRDPS: Canadian Meteorological Center High Resolution Deterministic Prediction System

ECMWF: European Center for Medium Range Forecasts

SREF: Short Range Ensemble Forecast

HIRESW: High Resolution Window WRF

More info at these links–

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Philadelphia National Weather Service Office

How to install wgrib2 on Mac OSX

Jetstream Introduction to the Atmosphere-NOAA

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Earlier Online Forecasts Archives

Theweatherguy has been posting weekend weather and storm forecasts online since 1995.


theweatherguy's forecasts from 1995 through 2004 were part of the Bicycle Club of Philadelphia Web Site


theweatherguy's forecasts from 2004 through 2014
can be found at

http://theweatherguy.net/blosxom.cgi


Disclaimer

I am not a meteorologist and I provide this information as a hobby and for entertainment (mostly my own :-) .

While attempts are made to predict the weather as best as I can, use these forecasts at your own risk! I cannot be responsible for any direct or indirect consequential injury/damages due to your use of these forecasts.

Always check the NWS Official Forecast for your final plans.

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