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Useful Link for the Model Blend (NBM) Data
Posted Saturday 11/23/24 @ 4:56 PM — The NBM is considered one of the best sources of hourly temperatures and winds and rainfall. The NWS has a link for obtaining this data in text format, albeit for local airports ( but not specific locations like Center City as I provided below.)
I’ve pre-configured the link for Philadelphia and Northeast Airports along with Wings Field in Blue Bell.
This link has been shared on this blog before, with explanations and examples to how it uses the GMT time zone (now called UTC or Coordinated Universal Time).
The hourly NBM labeled NBH is very useful once you get used to the GMT (Universal) time. (7AM here is the column labeled 12)
The extended (NBE, NBX) data is less intuitive, since as an example, next Thursday’s daytime data is shown in the column labeled 00z Friday (which occurs at 7 PM EST Thursday). You can find my NBM Text guide here.
Sunday Forecast Update
Posted Saturday 11/23/24 @ 12:06 PM — Latest NBM wind meteogram for grid point Center City Philadelphia and the marathon. Large uncertainty range (dotted lines) on wind gusts.
I’ve updated the regional rainfall totals map for the past 48 hours here.
Originally Posted Fri @ 6:52 PM — —The deep upper low and surface low exit our area late Friday night. Skies will clear for Saturday with high pressure building in. A weak warm front will bring a mix of clouds and sun Sunday. Clouds decrease during the mid afternoon. I’ve used the NBM data for Center City Philadelphia to cover the Marathons.
Saturday Forecast
Mostly sunny and a bit chilly and windy. We’ll still be under the influence of a cyclonic flow flow, but the GFS keeps us partly sunny.
Here’s the NBM wind/gust meteogram for Center City Saturday and Sunday—
Sunday Forecast
A warm front will bring some clouds at times during the morning that will break mid afternoon. It will still be somewhat windy.
Here’s the NBM temperature meteogram for grid point Center City—
