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 84 °F	Tonight Fog late Low: 54°	NWS: Sunny, with a high near 84. North wind around 12 mph. OlallaWx: Clear in the evening, becoming partly cloudy after midnight. Patchy light fog after midnight. Low 54°. Wind northeast around 3 mph.
Tonight Mostly Clear Lo 60 °F	Tuesday Fog a.m. High: 88°	NWS: Mostly clear, with a low around 60. North wind 3 to 12 mph. OlallaWx: Sunny. Patchy light fog in the morning. Unusually hot. High 88°. UV index up to 8. Wind west-northwest near calm in the morning, becoming north around 5 mph in the afternoon.
Tuesday Sunny Hi 83 °F	Tuesday night Partly Cloudy Low: 53°	NWS: Sunny. High near 83, with temperatures falling to around 81 in the afternoon. North northwest wind 3 to 10 mph. OlallaWx: Clear in the evening, becoming fair to partly cloudy after midnight. Low 53°. Wind north around 3 mph in the evening, becoming near calm after midnight.
Tuesday Night Mostly Clear Lo 57 °F	Wednesday Partly Cloudy High: 81°	NWS: Mostly clear, with a low around 57. North northeast wind 5 to 9 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-southeast near calm in the morning, becoming west-southwest around 4 mph in the afternoon.
Wednesday Mostly Sunny Hi 75 °F	Wednesday night Mostly Cloudy Low: 54°	NWS: Mostly sunny, with a high near 75. South southwest wind 5 to 8 mph. OlallaWx: Fair in the evening, becoming mostly cloudy after midnight. Low 54°. Wind east-southeast around 2 mph in the evening, becoming south-southwest after midnight.
Wednesday Night Mostly Cloudy Lo 55 °F	Thursday Mostly Sunny High: 77°	NWS: Mostly cloudy, with a low around 55. OlallaWx: Partly to mostly sunny in the morning, becoming sunny in the afternoon. High 77°. UV index up to 7. Wind south-southwest near calm in the morning, becoming north-northwest around 5 mph, gusting to 16 mph, in the afternoon.
Thursday Mostly Sunny Hi 73 °F	Thursday night Mostly Cloudy Low: 54°	NWS: Mostly sunny, with a high near 73. OlallaWx: Mostly clear in the evening, becoming mostly cloudy after midnight. Low 54°. Wind north-northwest around 4 mph, gusting to 15 mph, in the evening, becoming south-southeast near calm after midnight.