| NWS | FW4751 | |
| Synoptic | F4751 | |
| PurpleAir | PaloAltoWeather.com | |
| APRS/CWOP | F4751 | |
| UK Met Office | PaloAltoWeather.com | |
| WOW-BE | PaloAltoWeather.com | |
| Windy | f0634ec3 | |
| Weather Under. | KCAPALOA156 | |
| WeatherCloud | PaloAltoWeather.com | |
| AWEKAS | 16242 | |
| PWS | PALOALTOCA |
| Latitude | 37° 25.89' N | |
| Longitude | 122° 06.66' W | |
| Altitude | 11 feet | |
| Hardware | Vantage Pro2 Plus 24H Fan Aspirated |
|
| Wireless Weather Envoy | ||
| USB Data Logger | ||
| Sonic Anemometer | ||
| HyQuest TB3 | ||
| PurpleAir Classic Plus1,2 | ||
| AirGradient Open Air3 | ||
| 1 | EPA correction applied | |
| 2 | EPA Final AQI Update | |
| 3 | Used to track CO2 | |
| WX Srv. | Raspberry Pi 5 8GB | |
| M.2 Hat+ | ||
| Raspberry Pi SSD 1TB | ||
| Raspberry Pi OS (Trixie) | ||
| Web Srv. | Google Compute Engine | |
| Axion N4A (Arm) | ||
| 1 vCPU, 2GB memory | ||
| 20GB disk | ||
| Debian OS (Trixie) |
| Signal Quality | 99% | |
| Tx Battery | OK | |
| Console Battery | 3.9 V |
| Host Name | charlemagne5t | |
| Operating System | Linux 6.18.39+rpt-rpi-2712 | |
| Server uptime | 6 days, 09 h, 56 m, 53 s | |
| WeeWX uptime | 4 days, 01 h, 35 m, 57 s | |
| VM Size | ||
| VM RSS | ||
| Shared | ||
| Data | ||
| WeeWX version | 5.4.0 | |
| Skyfield version | 1.54 | |
| Python version | 3.13.5 | |
| Custom Skin | LiveSeasons 7.12 |
Present Day Installation
PaloAltoWeather.com Rooftop
Photo: May 21, 2025
Davis Vantage Pro2 Plus 6163
Davis Sonic Anemometer
HyQuest Solutions TB3 Rain Gauge
24-Hour Fan-Aspirated Radiation Shield
Temperature
Humidity
Barometer
Wind Speed/Direction
Rainfall
UV
Radiation
Present Day Computer Rack
PaloAltoWeather.com Computer Rack
Photo: May 23, 2025
RainWise Weather
Station Installed
January 26, 2019
September 18, 2022 (Retired)
RainWise Mark III-LR
Reporting to the
National Weather Service
Begins—Station F4751
(APRSWXNET/CWOP)
March 13, 2019
Click to see this station on NWS.
PaloAltoWeather.com
Goes Live
April 21, 2019
Original PaloAltoWeather.com (re-creation)
WeatherBoard™
Introduced
July 2019
Click to check out WeatherBoard!
Seismograph
Goes Live
Early August 2019
Superseded by Shake 3D in Oct 2019
May 27, 2024 (Retired)
Raspberry Shake 4D
R3C71, AM Network, Raspberry Shake, S.A.
Infrasound Monitor
Goes Live
Mid August 2019
November 24, 2022 (Retired)
Raspberry Boom
RE991, AM Network, Raspberry Shake, S.A.
PaloAltoWeather.com
With Seismograph
October 17, 2019
Courtesy of Internet Archive
Seismograph
Upgraded
Mid October 2019
Raspberry Shake 3D
R24AE, AM Network, Raspberry Shake, S.A.
Air Quality Reporting
Goes Live
Late December 2019
PurpleAir PA-II-SD
Currently two PurpleAir
sensors are deployed.
Second Weather Station
Installed
September 1, 2020 (For Testing)
September 5, 2020 (Designated Primary)
September 18, 2022 (Designated Secondary)
Wireless Vantage Pro2™ Plus
Additional Capabilities
24-Hr Fan Aspirated Radiation Shield
Ultrasonic Anemometer
On Board UV Sensor
On Board Radiation Sensor
Davis Air Quality Sensor
Installed
September 18, 2020 (Evaluation Begins)
February 15, 2023 (Retired)
Davis AirLink
RainWise Rain
Gauge Installed
October 1, 2020
November 23, 2020 (Retired)
RainWise Rain Gauge
8" diameter collector meets NWS specifications for statistical accuracy.
This rain gauge, in turn, has subsequently been upgraded (see below).
RainWise Industrial
Rain Gauge Installed
November 23, 2020
November 24, 2022 (Retired)
RainWise Industrial Rain Gauge
8.5" diameter collector.
Meets NWS specification for
statistical accuracy.
Second Davis Vantage Pro2 Plus
Weather Station Installed
September 17, 2022
September 18, 2022 (Designated Primary)
HyQuest Solutions TB3
Rain Gauge Installed
September 17, 2022
HyQuest Solutions TB3 Rain Gauge
The world standard in
tipping rain gauges.
Due to the integrated siphon,
the gauge delivers high levels
of accuracy across a broad
range of rainfall intensities.
HyQuest Solutions TB7
Backup Rain Gauge Installed
November 24, 2022
HyQuest Solutions TB7 Rain Gauge
HyQuest Solutions’ TB7 is a high-
quality tipping bucket rain gauge
for measuring rainfall.
PurpleAir Flex Air
Quality Sensor Installed
February 15, 2023 (Evaluation Begins)
May 25, 2024 (Retired)
PurpleAir PA-II-Flex
Main & Secondary Servers
Moved To
Raspberry Pi 5 8GB Computers
May 25, 2024
PaloAltoWeather Computer Rack
PaloAltoWeather.com's servers moved
from a mix of NUC 7i5 and Raspberry Pi
servers to being completely on Raspberry
Pi 5 8G computers.
Note: PaloAltoWeather.com web traffic is
served by a Google GCE instance.
Bulky Davis Consoles
Replaced by Davis Envoys
October 2024
Davis Envoy Array
Photo: May 23, 2025
PaloAltoWeather.com Rooftop Prior to
Foam Roof and Solar Installation
Pre-Construction PaloAltoWeather.com Rooftop
Photo: November 29, 2022
Davis Vantage Pro2 Plus 6163 (right)
Davis Sonic Anemometer (right top) (background left)
HyQuest Solutions TB3 Rain Gauge (foreground left)
Davis Vantage Pro2 Plus 6163 (background center)
Davis Sonic Anemometer (background center top)
HyQuest Solutions TB3 Rain Gauge (foreground left)
24-Hour Fan-Aspirated Radiation Shield
Temperature
Humidity
Barometer
Wind Speed/Direction
Rainfall
UV
Radiation
HyQuest Solutions TB7 Rain Gauge (background left)
Rooftop Construction Begins
April 10, 2025
Solar Supports Installed
Rooftop Prepared for Foam Spraying
Photo: April 23, 2025
Foam Roof Sprayed
April 23, 2025
Spraying the Foam Roof
Photo: April 23, 2025
Initial Foam Coat Complete
Photo: April 23, 2025
Solar Panels Installed
May 1, 2025
Solar Panels Installed
Photo: May 1, 2025
Weather Station Returned to Rooftop
May 21, 2025
PaloAltoWeather.com Rooftop After Construction
Photo: May 21, 2025
Weather Station Data Construction Impact
UV, Radiation & Wind Speed/Direction
Impacted During This Time
April 10—May 21, 2025
Impact on UV during construction.
Impact on Radiation during construction.
Carbon Dioxide
Reporting Goes Live
October 31, 2025
AirGradient Open Air
Reporting CO2
Also tracking TVOC & NOx
PaloAltoWeather.com ©2019-2026 by John A Kline.
Contact: weatherman@paloaltoweather.com
Don't use this information to make consequential decisions.
Double check information before relying on it!