#------------------------------------------------- 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: 2025-07-14 17:00 to 2025-07-17 16:00 # # 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: 2025-07-14 17:00 to 2025-07-17 16:00 # # As of: Jul 17, 2025, 4:53:27 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) 2025-07-14 17:00,48.0,24.5,,,84.00,150.90,7.2,4.0,114 2025-07-14 18:00,48.0,24.5,,,92.00,75.57,6.0,2.8,185 2025-07-14 19:00,47.0,24.5,,,83.00,38.01,5.4,1.6,222 2025-07-14 20:00,46.0,24.5,0.0,,87.00,16.18,4.6,2.2,89 2025-07-14 21:00,45.0,24.5,0.0,,95.00,8.35,2.1,0.7,237 2025-07-14 22:00,45.0,24.5,0.0,,96.00,1.09,3.0,0.9,252 2025-07-14 23:00,45.0,24.5,0.0,0,93.00,0.37,2.9,0.8,146 2025-07-15 00:00,45.0,24.5,0.0,,93.00,0.30,4.2,2.4,261 2025-07-15 01:00,44.0,24.5,0.0,,93.00,0.38,3.4,1.9,247 2025-07-15 02:00,44.0,24.5,0.0,,95.00,0.41,2.5,1.1,245 2025-07-15 03:00,44.0,24.5,0.0,,95.00,1.33,2.9,0.6,150 2025-07-15 04:00,44.0,24.5,0.0,,98.00,5.66,2.7,1.0,83 2025-07-15 05:00,44.0,24.5,0.0,0,99.00,23.32,3.5,1.8,80 2025-07-15 06:00,44.0,24.5,0.0,0,99.00,43.51,5.7,1.6,81 2025-07-15 07:00,45.0,24.5,0.0,,99.00,76.61,5.9,2.0,112 2025-07-15 08:00,46.0,24.5,0.0,,92.00,170.70,7.2,3.4,157 2025-07-15 09:00,47.0,24.5,0.0,,94.00,429.40,10.0,5.2,103 2025-07-15 10:00,49.0,24.5,0.0,,92.00,479.00,10.4,5.3,100 2025-07-15 11:00,50.0,24.6,0.0,0,90.00,473.20,10.5,5.2,106 2025-07-15 12:00,52.0,24.6,0.0,,81.00,599.60,16.4,4.9,235 2025-07-15 13:00,54.0,24.5,0.0,,69.00,628.70,11.0,5.5,270 2025-07-15 14:00,54.0,24.6,,,64.00,376.50,9.9,4.8,260 2025-07-15 15:00,54.0,24.6,,,64.00,659.50,11.2,6.9,261 2025-07-15 16:00,54.0,24.6,,,62.00,392.30,9.8,3.3,276 2025-07-15 17:00,55.0,24.6,,,63.00,395.70,9.2,3.6,265 2025-07-15 18:00,54.0,24.6,,,61.00,190.20,11.2,4.6,269 2025-07-15 19:00,52.0,24.6,,,74.00,96.20,5.1,2.0,281 2025-07-15 20:00,51.0,24.6,,,73.00,53.56,4.7,2.2,277 2025-07-15 21:00,51.0,24.6,,0,76.00,11.45,6.0,2.8,276 2025-07-15 22:00,49.0,24.6,,,80.00,2.02,5.9,3.5,263 2025-07-15 23:00,46.0,24.5,,,82.00,0.06,7.6,5.3,262 2025-07-16 00:00,46.0,24.5,,,81.00,0.27,6.2,3.1,252 2025-07-16 01:00,48.0,24.5,0.0,,81.00,0.27,4.7,2.6,257 2025-07-16 02:00,46.0,24.5,0.0,,83.00,0.16,6.5,3.7,254 2025-07-16 03:00,44.0,24.5,0.0,,83.00,1.48,9.0,5.1,261 2025-07-16 04:00,44.0,24.5,0.0,,81.00,13.63,8.2,4.9,255 2025-07-16 05:00,45.0,24.6,0.0,,81.00,132.60,5.2,2.4,262 2025-07-16 06:00,52.0,24.5,0.0,,73.00,236.00,4.3,1.3,100 2025-07-16 07:00,54.0,24.5,0.0,,68.00,291.90,5.8,2.3,94 2025-07-16 08:00,55.0,24.6,0.0,,67.00,235.70,3.5,1.9,86 2025-07-16 09:00,54.0,24.6,,,65.00,365.90,7.8,2.7,110 2025-07-16 10:00,55.0,24.6,,,76.00,380.70,6.6,2.6,84 2025-07-16 11:00,58.0,24.6,,,74.00,359.40,7.5,2.9,90 2025-07-16 12:00,58.0,24.6,,,70.00,304.80,6.2,2.6,131 2025-07-16 13:00,58.0,24.5,,,66.00,223.80,11.8,4.3,138 2025-07-16 14:00,54.0,24.6,,,69.00,166.40,8.4,4.5,98 2025-07-16 15:00,52.0,24.6,,,98.00,158.00,7.6,2.6,153 2025-07-16 16:00,53.0,24.6,,,88.00,248.30,5.2,1.9,87 2025-07-16 17:00,56.0,24.6,,,69.00,472.20,10.8,3.7,154 2025-07-16 18:00,56.0,24.6,,,60.00,356.80,14.1,3.6,214 2025-07-16 19:00,52.0,24.6,,,72.00,89.80,4.3,1.8,158 2025-07-16 20:00,50.0,24.6,,,79.00,50.44,5.4,2.1,249 2025-07-16 21:00,48.0,24.6,,,82.00,13.02,5.5,3.3,258 2025-07-16 22:00,48.0,24.6,,,83.00,1.54,4.4,2.4,253 2025-07-16 23:00,48.0,24.6,,,82.00,0.34,4.5,2.3,250 2025-07-17 00:00,47.0,24.6,,,85.00,0.32,4.4,2.1,252 2025-07-17 01:00,48.0,24.5,,0,83.00,0.28,13.6,6.1,270 2025-07-17 02:00,49.0,24.5,,,76.00,0.28,10.1,6.1,276 2025-07-17 03:00,47.0,24.5,,,77.00,1.25,7.5,2.3,244 2025-07-17 04:00,47.0,24.5,,,79.00,8.63,3.7,1.2,234 2025-07-17 05:00,45.0,24.5,,,88.00,74.65,3.9,1.7,232 2025-07-17 06:00,47.0,24.5,,,88.00,143.20,4.9,1.7,211 2025-07-17 07:00,47.0,24.5,,,95.00,365.50,6.8,3.4,104 2025-07-17 08:00,47.0,24.5,,,97.00,229.20,6.6,2.9,87 2025-07-17 09:00,48.0,24.6,,,99.00,267.10,8.3,2.9,82 2025-07-17 10:00,49.0,24.6,,,94.00,565.30,10.6,5.5,111 2025-07-17 11:00,51.0,24.5,,,87.00,588.50,12.2,5.7,116 2025-07-17 12:00,53.0,24.5,,,78.00,671.60,13.0,5.9,118 2025-07-17 13:00,54.0,24.5,,,73.00,799.30,11.2,5.0,144 2025-07-17 14:00,56.0,24.5,,,71.00,348.80,11.9,5.3,202 2025-07-17 15:00,56.0,24.5,,,69.00,,,,