AAA |
(or AAB, AAC, AAD... etc., in sequence) Amended meteorological message (a message type designator) |
AAL |
Above aerodrome level |
ABNDT |
Abundant |
ABNML |
Abnormal |
ABT |
About |
ABV |
Above |
Ac or AC |
Altocumulus |
AC |
Anticipated Convection Outlook |
ACC |
Area Control Center or area control |
ACCAS |
Altocumulus Castellanus |
ACCID |
Notification of an aircraft accident |
ACCUM |
Accumulate |
ACFT |
Aircraft |
ACK |
Acknowledge |
ACLT |
Accelerate |
ACLTD |
Accelerated |
ACLTG |
Accelerating |
ACLTS |
Accelerates |
ACPT |
Accept or accepted |
ACPY |
Accompan |
ACRS |
Across |
ACSL |
Altocumulus Standing Lenticular |
ACT |
Active or activated or activity |
ACTV |
Active |
ACTVTY |
Activity |
ACYC |
Anticyclone |
AD |
Aerodrome |
ADA |
Advisory area |
ADDN |
Addition or additional |
ADJ |
Adjacent |
ADL |
Additional |
ADM |
Administrative Messages |
ADQT |
Adequate |
ADQTLY |
Adequately |
ADR |
Advisory route |
ADRNDCK |
Adirondack |
ADVCT |
Advect |
ADVCTD |
Advected |
ADVCTG |
Advecting |
ADVCTN |
Advection |
ADVCTS |
Advects |
ADVIS |
Headwater Advisory Program |
ADVN |
Advance |
ADVNG |
Advancing |
ADVS |
Advisory service |
ADVY |
Advisory |
ADVYS |
Advisories |
ADZ |
Advise |
AFCT |
Affect |
AFCTD |
Affected |
AFCTG |
Affecting |
AFD |
Area Forecast Discussion |
AFDK |
After dark |
AFOS |
Automation of Field Operations and Services |
AFT |
After (time or place) |
AFTN |
Afternoon |
AGC |
Automatic Gain Control |
AGL |
Above ground level |
AGN |
Again |
AGRD |
Agreed |
AGRMT |
Agreement |
AGRS |
Agrees |
AHD |
Ahead |
AHOS-S |
Automatic Hydrologic Observing System - Satellite |
AHOS |
Automatic Hydrologic Observing System |
AHOS-T |
Automatic Hydrologic Observing System - Telephone |
AIRMET |
AIRman's METeorological Information |
AK |
Alaska |
AL |
Alabama |
ALERT |
Automated Local Evaluation in Real Time |
ALF |
Aloft |
ALG |
Along |
ALGHNY |
Allegheny |
ALQDS |
All quadrants |
ALSTG |
Altimeter setting |
ALT |
Altitude |
ALTA |
Alberta |
ALTHO |
Although |
ALTM |
Altimeter |
ALUTN |
Aleutian |
AMD |
Amend or amended (used to indicate amended meteorological message; message type designator) |
AMDD |
Amended |
AMDG |
Amending |
AMDT |
Amendment |
AMP |
Amplify |
AMPG |
Amplifying |
AMPLTD |
Amplitude |
AMS |
Air mass |
AMSL |
Above mean sea level |
AMT |
Amount |
ANLYS |
Analysis |
ANS |
Answer |
AOA |
At or above |
AOB |
At or Below |
AP |
Anomalous Propagation or Airport |
APCH |
Approach |
APCHG |
Approaching |
APCHS |
Approaches |
API |
Antecedent Precipitation Index |
APLCN |
Appalachian |
APLCNS |
Appalachians |
APPR |
Appear |
APPRG |
Appearing |
APPRS |
Appears |
APR |
April |
APRNT |
Apparent |
APRNTLY |
Apparently |
APRX |
Approximate or approximately |
APRXLY |
Approximately |
APSG |
After passing |
AQI |
Air Quality Statement |
AR |
Arkansas |
Arcus |
Arc Cloud |
ARFOR |
Area forecast (in aeronautical meteorological code) |
ARND |
Around |
ARPT |
Airport |
ARR |
Arrive or arrival |
ART |
Automatic Radio Theodolite Master Control Unit As or AS - Altostratus |
ASAP |
AHOS SHEF Automatic Processing System or as soon as possible |
ASAPTRAN |
The software component of ASA |
ASC |
Ascent to or ascending to |
ASH |
Assistant Service Hydrologist |
ASL |
Above Sea Level |
ASMD |
As amended |
ASOS |
Automated Surface Observing System |
ASSOCD |
Associated |
ASSOCN |
Association |
AT... |
At (followed by time at which weather change is forecast to occur) |
ATAD |
Automated Telephone Answering Device |
ATDTDCS |
Automated Tone Dial Telephone Data Collection System |
ATLC |
Atlantic |
ATMU |
Air Transportable Mobile Unit |
ATP... |
At... (time or place) |
ATTM |
At this time |
ATTN |
Attention |
AUG |
August |
AVBL |
Available or availability |
AVG |
Average |
AVN |
Aviation model |
AWC |
Aviation Weather Center |
AWHPS |
Area Wide Hydrologic Prediction System |
AWIPS |
Advanced Weather Interactive Processing System |
AWOS |
Automated Weather Observation System |
AWT |
Awaiting |
AZ |
Arizona |
AZM |
Azimuth |