#------------------------------------------------- WARNING -------------------------------------------- # # The data you have obtained from this automated Natural Resources Conservation Service # database are subject to revision regardless of indicated Quality Assurance level. # Data are released on condition that neither the NRCS nor the United States Government # may be held liable for any damages resulting from its use. # # SNOTEL air temperature data contains a known bias. This bias is rooted in the sensor # conversion equation and varies through the output range. Solutions are in development. # For more information go to Air Temperature Bias Correction. # # Help and Tutorials: https://www.nrcs.usda.gov/sites/default/files/2023-03/Report%20Generator%20Help%20Guide.pdf # Air Temperature Bias Correction: https://www.nrcs.usda.gov/wps/portal/wcc/home/snowClimateMonitoring/temperature/temperatureBiasCorrection/ # # Support Contact: usdafpacbc@servicenowservices.com # #------------------------------------------------------------------------------------------------------ # # Reporting Frequency: Hourly # Date Range: 2025-06-29 22:00 to 2025-07-02 21:00 # # Data for the following site(s) are contained in this file: # # SNOTEL 641: Frostbite Bottom, AK # # Data items provided in this file: # # Element Name Value Type Function Type Function Duration Base Data Measurement Units Sensor Depth Element Code Description # Air Temperature Observed Value None Instantaneous N/A Degrees fahrenheit N/A TOBS Instantaneously observed air temperature # Precipitation Accumulation Value None Instantaneous N/A Inches N/A PREC Water year accumulated precipitation # Snow Water Equivalent Value None Instantaneous N/A Inches N/A WTEQ Depth of water that would theoretically result if the entire snowpack were melted instantaneously # Snow Depth Value None Instantaneous N/A Inches N/A SNWD Total snow depth # Relative Humidity Value None Instantaneous N/A Percent N/A RHUM Relative humidity # Solar Radiation Average Value None Hour N/A Watts/meter squared N/A SRADV Average solar radiation # Wind Speed Maximum Value None Hour N/A Miles/hour N/A WSPDX Maximum wind speed # Wind Speed Average Value None Hour N/A Miles/hour N/A WSPDV Average wind speed # Wind Direction Average Value None Hour N/A Degrees N/A WDIRV Average wind direction # # Quality Control flags included: # # Flag Name Description # V Valid Validated Data # N No Profile No profile for automated validation # E Edit Edit, minor adjustment for sensor noise # K Estimate Estimate # C Correction A different equation has been applied to the original sensor voltage # B Back Estimate Regression-based estimate for homogenizing collocated Snow Course and Snow Pillow data sets # X External Estimate External estimate # S Suspect Suspect data # M Missing Value is missing # # Quality Assurance flags included: # # Flag Name Description # U Unknown Unknown # R Raw No Human Review # P Provisional Preliminary Human Review # A Approved Processing and Final Review Completed # #------------------------------------------------------------------------------------------------------ # # Frostbite Bottom (641) # Alaska SNOTEL Site - 2690 ft # Reporting Frequency: Hourly; Date Range: 2025-06-29 22:00 to 2025-07-02 21:00 # # As of: Jul 2, 2025, 9:25:40 PM GMT-08:00 # Date,Air Temperature Observed (degF),Precipitation Accumulation (in),Snow Water Equivalent (in),Snow Depth (in),Relative Humidity (pct),Solar Radiation Average (watt/m2),Wind Speed Maximum (mph),Wind Speed Average (mph),Wind Direction Average (degree) 2025-06-29 22:00,48.0,22.8,0.0,0,84.00,5.42,5.5,2.6,258 2025-06-29 23:00,47.0,22.8,0.0,1,82.00,0.64,5.0,2.2,256 2025-06-30 00:00,47.0,22.8,0.0,0,88.00,0.38,4.1,2.7,255 2025-06-30 01:00,47.0,22.8,0.0,,87.00,0.32,4.6,2.6,251 2025-06-30 02:00,47.0,22.8,0.0,0,88.00,0.34,3.7,1.6,257 2025-06-30 03:00,46.0,22.8,0.0,0,94.00,1.47,3.4,1.9,246 2025-06-30 04:00,45.0,22.8,0.0,0,97.00,11.24,5.5,2.1,199 2025-06-30 05:00,46.0,22.8,0.0,0,95.00,29.78,11.7,7.0,302 2025-06-30 06:00,47.0,22.8,0.0,0,90.00,104.60,12.6,6.3,302 2025-06-30 07:00,47.0,22.8,0.0,0,93.00,158.60,7.5,3.2,96 2025-06-30 08:00,47.0,22.8,0.0,0,98.00,136.50,5.1,2.5,107 2025-06-30 09:00,48.0,22.8,0.0,0,97.00,165.40,6.6,3.1,110 2025-06-30 10:00,47.0,22.8,0.0,,98.00,142.20,6.8,3.3,96 2025-06-30 11:00,47.0,22.9,0.0,,99.00,146.10,7.9,2.9,114 2025-06-30 12:00,47.0,22.9,0.0,0,99.00,146.00,7.2,4.5,116 2025-06-30 13:00,47.0,22.9,0.0,0,99.00,145.40,7.8,4.0,123 2025-06-30 14:00,47.0,22.9,0.0,0,99.00,133.60,7.0,2.6,88 2025-06-30 15:00,49.0,22.9,0.0,0,99.00,130.60,6.6,4.1,111 2025-06-30 16:00,49.0,22.9,0.0,0,99.00,91.30,7.5,4.5,113 2025-06-30 17:00,48.0,22.9,0.0,1,99.00,57.65,6.3,2.8,104 2025-06-30 18:00,49.0,22.9,0.0,0,99.00,54.69,4.5,1.9,91 2025-06-30 19:00,48.0,22.9,0.0,0,99.00,33.89,2.9,1.2,74 2025-06-30 20:00,48.0,22.9,0.0,1,99.00,17.11,4.6,1.5,123 2025-06-30 21:00,48.0,22.9,0.0,0,99.00,4.89,4.8,2.0,101 2025-06-30 22:00,47.0,22.8,0.0,0,99.00,1.79,4.2,1.9,251 2025-06-30 23:00,47.0,22.8,0.0,0,96.00,0.42,4.8,1.7,294 2025-07-01 00:00,47.0,22.8,0.0,0,91.00,0.17,7.4,4.0,267 2025-07-01 01:00,45.0,22.8,0.0,0,89.00,0.39,7.8,4.0,251 2025-07-01 02:00,47.0,22.8,0.0,0,84.00,1.15,4.8,2.3,252 2025-07-01 03:00,46.0,22.8,0.0,0,89.00,8.80,6.0,3.2,246 2025-07-01 04:00,43.0,22.8,0.0,0,90.00,53.43,5.1,3.4,247 2025-07-01 05:00,45.0,22.8,0.0,0,95.00,156.10,5.0,2.0,273 2025-07-01 06:00,48.0,22.8,0.0,0,92.00,176.90,4.4,1.3,94 2025-07-01 07:00,49.0,22.8,0.0,,89.00,252.70,7.5,2.2,100 2025-07-01 08:00,50.0,22.8,0.0,0,92.00,417.00,8.4,3.1,96 2025-07-01 09:00,51.0,22.8,0.0,0,89.00,612.50,9.4,5.4,115 2025-07-01 10:00,53.0,22.8,0.0,0,85.00,683.50,12.2,6.1,116 2025-07-01 11:00,54.0,22.7,,0,82.00,786.30,12.8,6.4,120 2025-07-01 12:00,55.0,22.7,,,76.00,591.30,13.2,6.1,121 2025-07-01 13:00,57.0,22.7,,,72.00,752.60,13.2,5.9,120 2025-07-01 14:00,58.0,22.7,,0,65.00,342.30,11.9,4.5,133 2025-07-01 15:00,58.0,22.7,,0,66.00,707.20,12.2,4.5,133 2025-07-01 16:00,59.0,22.7,,0,64.00,479.00,15.9,3.8,139 2025-07-01 17:00,57.0,22.7,,0,67.00,179.50,7.4,2.4,192 2025-07-01 18:00,56.0,22.8,,0,68.00,364.90,10.5,4.6,162 2025-07-01 19:00,54.0,22.8,,0,67.00,89.60,10.0,3.7,178 2025-07-01 20:00,49.0,22.8,,0,82.00,46.99,6.2,2.2,285 2025-07-01 21:00,50.0,22.8,,0,78.00,17.64,6.7,2.2,84 2025-07-01 22:00,48.0,22.9,0.0,0,76.00,5.52,6.9,3.8,239 2025-07-01 23:00,43.0,22.8,,0,85.00,0.63,6.1,3.6,251 2025-07-02 00:00,43.0,22.8,0.0,,89.00,0.08,6.9,4.7,252 2025-07-02 01:00,42.0,22.8,0.0,0,90.00,0.13,6.6,4.2,251 2025-07-02 02:00,43.0,22.8,0.0,,90.00,0.68,5.6,3.0,249 2025-07-02 03:00,44.0,22.8,0.0,0,87.00,4.88,4.3,2.6,255 2025-07-02 04:00,43.0,22.8,0.0,,87.00,22.08,4.0,2.3,257 2025-07-02 05:00,44.0,22.8,0.0,0,84.00,123.90,4.9,2.5,310 2025-07-02 06:00,49.0,22.8,0.0,,80.00,266.30,4.9,2.4,73 2025-07-02 07:00,50.0,22.8,0.0,0,76.00,373.10,9.9,4.2,89 2025-07-02 08:00,50.0,22.8,0.0,0,65.00,394.80,10.3,5.1,115 2025-07-02 09:00,50.0,22.8,,0,69.00,608.50,10.5,4.9,116 2025-07-02 10:00,52.0,22.7,,0,67.00,621.10,9.3,4.9,120 2025-07-02 11:00,53.0,22.7,,0,67.00,723.30,11.7,6.1,115 2025-07-02 12:00,55.0,22.7,,0,67.00,612.00,14.3,6.8,114 2025-07-02 13:00,57.0,22.7,,0,65.00,757.60,13.5,5.7,195 2025-07-02 14:00,59.0,22.7,,0,64.00,427.50,12.6,5.4,222 2025-07-02 15:00,60.0,22.7,,0,66.00,609.00,12.0,6.4,237 2025-07-02 16:00,59.0,22.7,,0,65.00,401.70,10.1,5.5,247 2025-07-02 17:00,59.0,22.7,,0,66.00,434.80,14.1,3.8,218 2025-07-02 18:00,59.0,22.7,,0,66.00,299.60,11.1,3.2,176 2025-07-02 19:00,58.0,22.8,,0,66.00,108.80,7.9,2.4,37 2025-07-02 20:00,53.0,22.8,,0,77.00,,,,