Weather Forecast Comparison

Explanation: The NWS Forecast forecast is provided by the National Weather Service. The OlallaWx.org forecast is generated locally using WXSIM forecasting software, customized for Olalla, WA and operated by OlallaWx.org.

About the Forecasts

OlallaWx.org uses WXSIM forecasting software — a sophisticated, locally-run weather prediction system designed to provide highly customized forecasts specifically for the Olalla, WA area.

Local tuning: The forecast is calibrated using current data from local OlallaWx weather stations including the Davis Vantage Pro 2 and Ambient WS-5000.
Historical learning: OlallaWx refines NWS forecasts by learning from past local OlallaWx weather patterns.
Hands-on control: Forecasts are generated and reviewed directly at OlallaWx.org.
Frequent updates: Updated approximately every two hours.

How it compares to NWS:

Feature	NWS (National Weather Service)	OlallaWx.org via WXSIM
Forecast Scope	Broad zones (counties, metro areas)	Hyperlocal (Olalla-specific)
Update Frequency	2–4 times daily	Approximately every 2 hours
Local Station Integration	Not always included	Uses OlallaWx.org station data
Forecast Engine	Government meteorological models	Hybrid expert + AI model (WXSIM)

NWS Forecast	OlallaWx.org Forecast	Forecast
Tonight Mostly Clear Lo 60 °F	Tonight Partly Cloudy Low: 53°	NWS: Mostly clear, with a low around 60. North northeast wind 3 to 7 mph. OlallaWx: Clear in the evening, becoming partly cloudy after midnight. Low 53°. Wind northeast around 2 mph.
Tuesday Sunny Hi 83 °F	Tuesday Sunny High: 88°	NWS: Sunny. High near 83, with temperatures falling to around 81 in the afternoon. North northwest wind 3 to 10 mph. OlallaWx: Sunny. Unusually hot. High 88°. UV index up to 8. Wind northwest near calm in the morning, becoming north around 5 mph in the afternoon.
Tuesday Night Mostly Clear Lo 57 °F	Tuesday night Partly Cloudy Low: 51°	NWS: Mostly clear, with a low around 57. North northeast wind 5 to 9 mph. OlallaWx: Clear in the evening, becoming fair to partly cloudy after midnight. Cool. Low 51°. Wind north around 3 mph in the evening, becoming near calm after midnight.
Wednesday Mostly Sunny Hi 75 °F	Wednesday Partly Cloudy High: 81°	NWS: Mostly sunny, with a high near 75. South southwest wind 5 to 8 mph. OlallaWx: Partly cloudy in the morning, becoming partly to mostly sunny in the afternoon. Warm. High 81°. UV index up to 7. Wind south-southwest around 3 mph in the morning, becoming west-southwest in the afternoon.
Wednesday Night Mostly Cloudy Lo 55 °F	Wednesday night Partly Cloudy Low: 55°	NWS: Mostly cloudy, with a low around 55. West southwest wind 5 to 8 mph. OlallaWx: Fair to partly cloudy in the evening, becoming mostly cloudy to cloudy after midnight. Low 55°. Wind southeast around 2 mph in the evening, becoming south-southwest after midnight.
Thursday Mostly Sunny Hi 73 °F	Thursday Partly Cloudy High: 76°	NWS: Mostly sunny, with a high near 73. OlallaWx: Partly cloudy in the morning, becoming mostly sunny in the afternoon. A chance of rain. High 76°. UV index up to 7. Wind west-northwest around 3 mph in the morning, becoming north in the afternoon. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Thursday Night Partly Cloudy Lo 54 °F	Thursday night Mostly Cloudy Low: 54°	NWS: Partly cloudy, with a low around 54. OlallaWx: Fair in the evening, becoming mostly cloudy after midnight. Low 54°. Wind north around 4 mph in the evening, becoming northeast near calm after midnight.