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
This Afternoon Sunny Hi 87 °F	This afternoon Clear High: 85°	NWS: Sunny, with a high near 87. North wind around 14 mph. OlallaWx: Clear. Hot. High 85°. UV index up to 5. Wind north around 11 mph, gusting to 24 mph.
Tonight Clear Lo 63 °F	Tonight Fog late Low: 52°	NWS: Clear. Low around 63, with temperatures rising to around 65 overnight. North northeast wind 5 to 13 mph. OlallaWx: Clear. Patchy light fog after midnight. Cool. Low 52°. Wind north around 4 mph in the evening, becoming near calm after midnight.
Wednesday Sunny Hi 92 °F	Wednesday Fog a.m. High: 89°	NWS: Sunny, with a high near 92. West wind 2 to 8 mph. OlallaWx: Sunny. Patchy light fog in the morning. Unusually hot. High 89°. UV index up to 8. Wind north around 2 mph in the morning, becoming west in the afternoon.
Wednesday Night Clear Lo 60 °F	Wednesday night Mostly Clear Low: 52°	NWS: Clear, with a low around 60. Northwest wind around 7 mph. OlallaWx: Clear in the evening, becoming mostly clear after midnight. Cool. Low 52°. Wind west-northwest near calm in the evening, becoming south-southwest after midnight.
Thursday Sunny Hi 85 °F	Thursday Sunny High: 87°	NWS: Sunny, with a high near 85. West wind around 8 mph. OlallaWx: Sunny. Unusually hot. High 87°. UV index up to 8. Wind south-southwest near calm in the morning, becoming north-northwest around 4 mph in the afternoon.
Thursday Night Mostly Clear Lo 60 °F	Thursday night Fog late Low: 51°	NWS: Mostly clear, with a low around 60. OlallaWx: Clear. Patchy light fog after midnight. Cool. Low 51°. Wind north-northwest around 2 mph in the evening, becoming southwest after midnight.
Friday Sunny Hi 82 °F	Friday Fog a.m. High: 87°	NWS: Sunny, with a high near 82. OlallaWx: Sunny in the morning, becoming partly to mostly sunny in the afternoon. Patchy light fog in the morning. Unusually hot. High 87°. UV index up to 7. Wind southwest around 5 mph, gusting to 16 mph, in the morning, becoming 9 mph, gusting to 18 mph, in the afternoon.