Philadelphia Weekend Weather & Storm Forecasts

Philadelphia Weekend Weather & Storm Forecasts

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Weather Updates

Latest NAM data Available

Saturday, December 9, 2017 9:46 am GS

This post was revised 2 years ago

Latest NAM (morning run) has a QPF of 0.35 of PHL.   Snow totals 2-3 inches, Possibly 4.

Snow

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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 points: Fort Washington State Park and Blue Bell (KLOM) Montgomery County, PA. This data is more central to the Philadelphia area at large than Philadelphia Airport (KPHL), used previously.

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Current Conditions

Blue Bell

Last Updated on Apr 5 2020, 4:55 am EDT

Weather by NOAA

Current Conditions: Overcast

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Temp: 50°F

Wind: West at 4mph

Humidity: 85%

Dewpoint: 45.3°F

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Noteworthy

BillyPenn.com Interviews theweatherguy (2018)

Philadelphia Magazine Interview (2016)

Definitions, Acronyms & Links

QPF: “Quantity of Precipitation Falling”- 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)

NAM: North American Mesoscale Model

GFS: Global Forecast System Model

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

EKDMOS: Ensemble Kernal Density Model Output Statistics

SREF: Short Range Ensemble Forecast

CMC:  Canadian Meteorological Center Global Deterministic Prediction System

ECMWF: European Center for Medium Range Forecasts

HIRESW: High Resolution Window WRF

More info at these links–

Basic Weather Information

American Meteorological Society Glossary

Teaching Yourself Weather Forecasting

Philadelphia National Weather Service Office

How to install wgrib2 on Mac OSX

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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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