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NWS/NOAA AviationWeather.gov (METAR/TAF results displayed on NWS Aviationweather.gov page)
(button press takes you to AviationWeather.gov METAR results)
METARs / TAFs ( https://www.aviationweather.gov/ )
SAC VLLY region METARs_TAFs
TAF decoder (NWS) ( Wind[22020G35KT] - Visibility[3SM,P6SM] - Weather[RA,FG,HZ,BR,TS] - Sky Condition[SKC,CLR,BKN030] - Optional Data (Wind Shear)[WS015/22055KT])
[ For aviation purposes, the ceiling is the lowest broken or overcast layer or vertical visibility into a complete obscuration. ]
METAR/TAF Code List(NWS)
METAR Codes (Wikipedia)
TAF/METAR Ref card from FAASafety.gov (note: TAF/METAR wind direction True North, ASOS/AWOS/ATIS/ATC Twr wind direction from Ground to Air radio is Magnetic North)(AIM: Wind direction broadcast over FAA radios is in reference to magnetic north. Ref: AIM AWOS/AWSS/ASOS Meteorology section, p. 7-1-28)
METAR magnetic wind direction calculation (NOAA.gov)
METAR Numeric Codes (usually listed after RMK)
1xxxxx___6-hr maximum temp(2nd digit=0 is positive, 1 is negative)(eg. 10405 = +40.5 degrees Celsius)
2xxxxx___6-hr minimum temp (eg. 21337 = -33.7 degrees Celsius)
4/xxx___Total snow depth in inches (eg. 4/020 = snow depth of 20 inches on ground)
4xxxxxxxx___24-hr maximum/minimum temperatures, 2nd and sixth digits equal 0 for positive and 1 for negative (eg. 401551095 = 24-hr maximum temp of +15.5 degrees Celsius and a 24-hr minimum temp of -9.5 degrees Celsius)
5xxxx___3 hour pressure tendency. The second digit gives the tendency/trend: 0–3 is rising, 4 is steady and 5–8 is falling , the last 3 digits give the pressure change in tenths of a millibar in the last 3 hours. (eg 50009 indicates a rising pressure tendency/trend of 0.9 millibars.)
6xxxx___3 or 6 hour precipitation amount. The last 4 digits are the inches of rain in hundredths. (eg. 60200 = 2 inches of rain)
7xxxx___24-hour precipitation amount. The last 4 digits are the inches of rain in hundredths. (eg. 70500 = 5 inches of rain)
8/xxx___Cloud cover using WMO code. Three digit code follows the /. Lower numbers are for clearer skies, high numbers are for overcast. (I have not seen this in the NorCal airport METARs yet).
98xxx___Duration of sunshine in minutes. The last three digits after 98 are minutes. (eg. 98120 = 120 minutes of sunshine)
931xxx___Snowfall in the last 6-hours. The last three digits display snowfall in inches and tenths. (eg. 931515 = 51.5 inches of snowfall)
933xxx___Liquid water equivalent of the snow (SWE). The last three digits display liquid water equivalent of snow in inches and tenths (eg. 933055 = 5.5 inches of liquid water in snow)
Other METAR codes
SLP155 = current barometric pressure extrapolated to sea level (SLP155 equals 1015.5 hPa)
Pxxxx = liquid-equivalent precipitation accumulated during the last hour to hundredths of inches (P0050 = .5 inch of rain in the past hour)
Txxxxxxxx is the current Temperature and Dew point. The first 4 digits are temperature. The second 4 digits are Dew Point. The first digit of each group is either 0 for above zero Celsius or 1 for below zero Celsius. (eq. T00251015 = Temp +2.5C, Dew Pt -1.5C)
Area Forecast Discussions (specific map areas still active)
NWS AvnWthr Area Forecasts(Deactivated for CONUS, Area Forecasts still avlbl for Alaska, Hawaii, Gulf of Mexico and Caribbean areas)
NWS AvnWthr Aviation Forecast Discussions (AFD)
NWS AWC Graphical Forecasts for Aviation (NEW)(GFA is meant to replace the Area Forecast)
NWS AWC Aviation Forecasts (GFA static images)
Ceiling & Visibility (CIG & VSBY) NWS AWC (current)
NOTAMs / TFRs
FAA NOTAMS (SAC VLLY/SRRA NVDA/SF BAY RGNs)(FAA Direct Link)( https://pilotweb.nas.faa.gov/ )
FAA NOTAM Flight Path Search (FAA Direct Link)
FAA NOTAM PilotWeb Home page
FAA NOTAM Search Updated
FAA NOTAM Contractions(FAA Official Pub)
FAA TFR MAP(FAA Direct Link)(Use to find active TFRs)(or use Skyvector)
FAA Special Use Airspace (SUA) MAP (shows ACTIVE SUA areas including TFRs)
WINDs / TEMPs Aloft (NWS/aviationweather.gov)
( Wind direction is from true north. No winds are forecast within 1,500 feet of station elevation. Also, no temperatures are forecast for the 3,000 foot level or for any level within 2,500 feet of station elevation. )
NWS AvnWthr WindsTempsAloft(MAP)_US
NWS AvnWthr WindsTempsAloft(TEXT)_WstnUS(SFO)
Graphical Wind Forecast(select Wind Speed & Direction drop-down) (weather.gov)(will be shutdown soon)
Graphical Forecast (NEW)(Weather.gov)
Windy.com (wind direction for Sacramento region)
SIGMETs/AIRMETs/PIREPs
SIGMETs
AIRMETs(Map)
PIREPs/AIREPS(Aircraft Rpts)
AIRMET (Sierra(IFR MtnObscn), Tango(Trb),Zulu(Icg)) txt, west cst
SigWx PROGNOSTIC Charts / RADAR charts / SATELLITE
NOAA AVN WTHR STD BRFG
WTHR DPCTN
RADAR SMMRY
NOAA PROG CHTs (winds tend to parallel isobars, when isobars are closer together, wind speed is greater. High and Low Pressure wind pattens: winds tend to spiral in toward a surface low pressure center in a counterclockwise fashion, and spiral around a high pressure cell in a clockwise outflow pattern.)
NWS/NOAA Satellite
Density Altitude / Freezing Levels / Air Quality
NWS AvnWthr DENSITY ALTITUDE Map (select Temp.Difference from the Plot menu)(Colored map areas display additional altitude to add to surface Altitude to get DENSITY ALTITUDE)(for example, if you are at Blue Canyon(KBLU)(elev. 5284 MSL) and the map area over KBLU is red(+3000ft), KBLU's Density Altitude is 8284 (5284+3000)
NWS AVNWTHR FRZNG LVL LOWEST (Multi-Color US full map)(WHITE Areas = SURFACE temperatures BELOW FREEZING.)(title = Current Freezing Level Forecast )( Check current Freezing Level by setting Time to 0hr, check Forecast Freezing Level up to 18 hrs in the future by setting Time to 3, 6, 9, 12, 15 or 18 hrs) NWS Freezing Info page (ADDS Icing Help)
NWS AVNWTHR FRZNG LVL FRCST ICING at selected Altitude(Blue Shaded Map)_(SLD=Super-cooled Large Drop)(max=worst possible icing conditions at ANY altitude for a spc time period)
NWS AVNWTHR FRZNG LVL (HELP)
NOAA NWS US Air Quality Forecast Map
NOAA NWS NRN CA Air Quality Forecast Map
GPS status (NOAA, FAA.gov)
National Airspace System Status (Press GPS Status in the left menu under NAS Status)
NWS NOAA Planetary K-index (if > 4, GPS system accuracy may be reduced)
AirSpace Made Easy by FAASafety
National Weather Service (General Weather Public sites)
NWS Public Weather site (weather.gov)
NWS Digital Forecast (general)
NWS Public Weather Site (ClicMap)--Current Conditions
NWS Public Weather Site (Radar Locations)-show areas of T-Storms
NWS weather.gov_Sacramento Area Weather (Carmichael, CA)
NWS weather.gov Sacramento Executive Apt (KSAC) Cndtns and Forecast
NWS weather.gov Half Moon Bay Airport (KHAF) Current Conditions and Forecast
NWS weather.gov San Francisco Intl Apt (KSFO) Current Conditions and Forecast
Blue
Canyon (KBLU)
Sacramento, CA frcst temp range (7-day)
7-day text forecast NWS
NWS basic information
METAR update history (last 5 updates)
1800WxBrief
SkyVector
VFRmap(VFR_IFR)charts
iFlightPlanner
-30C_-22F
-25C_-13F
-20C_-4F
-15C__5F
-10C_14F
-5C__23F
0C___32F
5C___41F
10C__50F
15C__59F
20C__68F
25C__77F
30C__86F
35C__95F
40C__104F
45C__113F
50C__122F
STD Atmosphere (TEMP/PRESSURE at Sea Level) = 15C / 29.92 in Hg (1013.25 hPa)
TEMP lapse rate = 2C/1000ft
PRESSURE lapse rate = 1 in/1000ft
Pressure Altitude is altitude displayed by Altimeter when set to 29.92 in Hg
Density Altitude Described (FAA Safety.gov)(PDF link)
FAA OFFICIAL REFERENCE (Sectionals, Chart Supplements, AIM, Testing)
FlightAware KSMF
ADS-B Track Map
ATC Radar View(15 mins vw time)
(Prev.WthrPg)
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