|from: Sep 24 2017 5:09 am||until: 4:00 pm||Special Weather Statement level: Minor|
|Minimal threat to life or property - Responsive action SHOULD be taken soon (within next hour)|
|...Near Record Highs Again Today... One last day of unusually high heat and humidity can be expected to end the weekend. Highs, which will be at or near records, will be in the upper 80s to lower 90s today with peak heat indices a few degrees higher. People planning and attending outdoor events and activities,|
0 Bft Calm
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Precipitation, very unsettled
Forecast based on: Pressure: 1011.5 hPa - Trend: 0 (No change) - max: 1044.4 - min: 988.8
Wind from: SSE (English)
Month: 9. Hemisphere: 1 (Northern).
|This program tries to get a "same result forecast" as when using the
1915 Negretti and Zambra (Zambretti) Forecaster.
The original paper forecaster was designed for the Northern Hemisphere and UK "Weather Range". ie. The nearer the Poles the greater the spread between lower and upper barometer levels and large "trends" are needed for weather conditions change.
Conversely, the nearer the Equator the smaller the "spread" and smaller "trends" for change.
On the left a picture of the original weather prediction disc.
A forecast at approx. 09:00 local Solar Time is allegedly better than 90% accurate ! - even though it takes no account of rate of barometer change, wind speed or temperature.
More information can be found here: meteormetrics