Awos

ASOS/AWOS weather system station data including location, type, and operational information

Source: NASRTable: AWOSVersion: e25086c3e952 (effective 2026-04-16)

Unique record key is ASOS_AWOS_ID + ASOS_AWOS_TYPE. Decommissioned weather systems are not included. Replaces legacy AWOS.txt Subscriber File.

Example query

# Introspect the Awos type in GraphiQL at https://api.nav.sortie.co/graphql
# Example shape (pair with a compatible root query field):
{
  # ...rootQuery... {
    effDate
    asosAwosId
    asosAwosType
    stateCode
  # }
}

Run at https://api.nav.sortie.co/graphql — GraphiQL is available in-browser.

Fields (25)

Field	Type	Description	Units	Enum
effDate ← EFF_DATE	String	The 28 Day NASR Subscription Effective Date	YYYY/MM/DD
asosAwosId ← ASOS_AWOS_ID	String	Weather System Identifier. Unique 3-4 character alphanumeric identifier. Part of unique record key.
asosAwosType ← ASOS_AWOS_TYPE	AsosAwosType	Weather System Type. Part of unique record key.		10 values ASOS — Automated Surface Observing System AWOS-1 — Automated Weather Observing System Type 1 (wind, temperature, dewpoint, altimeter) AWOS-2 — Automated Weather Observing System Type 2 (AWOS-1 plus visibility) AWOS-3 — Automated Weather Observing System Type 3 (AWOS-2 plus cloud/ceiling) AWOS-3P — Automated Weather Observing System Type 3P (AWOS-3 plus precipitation) AWOS-3PT — Automated Weather Observing System Type 3PT (AWOS-3 plus precipitation and thunderstorm) AWOS-3T — Automated Weather Observing System Type 3T (AWOS-3 plus thunderstorm) AWOS-4 — Automated Weather Observing System Type 4 (full AWOS) AWOS-A — Automated Weather Observing System Type A (altimeter only) AWOS-AV — Automated Weather Observing System Type AV (altimeter and visibility)
stateCode ← STATE_CODE	AwosStateCode	Associated State Code standard two letter abbreviation for US States and Territories		57 values AK — Alaska AL — Alabama AR — Arkansas AZ — Arizona CA — California CO — Colorado CT — Connecticut DC — District of Columbia DE — Delaware FL — Florida GA — Georgia GU — Guam HI — Hawaii IA — Iowa ID — Idaho IL — Illinois IN — Indiana KS — Kansas KY — Kentucky LA — Louisiana MA — Massachusetts MD — Maryland ME — Maine MI — Michigan MN — Minnesota MO — Missouri MP — Northern Mariana Islands MS — Mississippi MT — Montana NC — North Carolina ND — North Dakota NE — Nebraska NH — New Hampshire NJ — New Jersey NM — New Mexico NV — Nevada NY — New York OH — Ohio OK — Oklahoma OR — Oregon PA — Pennsylvania PR — Puerto Rico QM — Gulf of Mexico (offshore) QW — Pacific Ocean (offshore) RI — Rhode Island SC — South Carolina SD — South Dakota TN — Tennessee TX — Texas UT — Utah VA — Virginia VI — U.S. Virgin Islands VT — Vermont WA — Washington WI — Wisconsin WV — West Virginia WY — Wyoming
city ← CITY	String	Weather System associated City Name
countryCode ← COUNTRY_CODE	AwosCountryCode	Country Code where Weather System is located		BM — Bermuda BS — Bahamas US — United States
commissionedDate ← COMMISSIONED_DATE	String	Commissioning date of the weather system. Decommissioned systems are not included in the file.
navaidFlag ← NAVAID_FLAG	ContrFuelAvbl	Flag indicating whether the weather system is associated with a NAVAID		Y — Weather system is associated with a NAVAID N — Weather system is not associated with a NAVAID
latDeg ← LAT_DEG	Int	Weather System Latitude Degrees component	degrees
latMin ← LAT_MIN	Int	Weather System Latitude Minutes component	minutes
latSec ← LAT_SEC	Float	Weather System Latitude Seconds component	seconds
latHemis ← LAT_HEMIS	LatHemis	Weather System Latitude Hemisphere		N — North S — South
latDecimal ← LAT_DECIMAL	Float	Weather System Latitude in Decimal Degrees format	degrees
longDeg ← LONG_DEG	Int	Weather System Longitude Degrees component	degrees
longMin ← LONG_MIN	Int	Weather System Longitude Minutes component	minutes
longSec ← LONG_SEC	Float	Weather System Longitude Seconds component	seconds
longHemis ← LONG_HEMIS	LongHemis	Weather System Longitude Hemisphere		E — East W — West
longDecimal ← LONG_DECIMAL	Float	Weather System Longitude in Decimal Degrees format	degrees
elev ← ELEV	Float	Weather System Elevation measured to nearest tenth of a foot	feet MSL
surveyMethodCode ← SURVEY_METHOD_CODE	ElevMethodCode	Weather System location determination method code		E — Estimated S — Surveyed
phoneNo ← PHONE_NO	String	Weather System primary Telephone Number
secondPhoneNo ← SECOND_PHONE_NO	String	Weather System secondary Telephone Number
siteNo ← SITE_NO	String	Landing Facility Site Number when Weather System is located at an Airport. References SITE_NO in the landing facility table.
siteTypeCode ← SITE_TYPE_CODE	SiteTypeCode	Landing Facility Type Code when Weather System is located at an Airport		A — Airport B — Balloonport C — Seaplane Base G — Gliderport H — Heliport U — Ultralight
remark ← REMARK	String	Free-text remark associated with the Weather System providing additional operational notes, associations, limitations, and other relevant information