AC 00-45F

Change 1Historical

Advisory circular · Aviation Weather Services

Approved
July 1, 2008
Last reviewed
September 13, 2024
This change
This entire document series, all through the H Revision, is canceled.
Cancels
AC00-45F
Cancelled by
AC00-45F CHG 2
Family
AC 00-45 · 10 versions
Revision
F, change 1
14 CFR parts
1

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed November 21, 2025.

Show pages 337–348
Page 349OCROpen in PDF

Aviation Weather Services, Advisory Circular 00-45F, Revision 1 ASOS and AWOS Locations * BLI

• BVS ¡ AWO OMK 'PAE BFI OLM SEA • • INH GEO * COE, MLP CTB HVR GGW TKW O" • YKM MALMS GTF OLF цИт cvO BTM

BZN BHK LVM QU57 RXE OAOC TWF • *PIH NATIONAL WEATHER SERVICE • ASOS + AWOS FED UGUST 200 NIRS GIS GROUF WESTERN REGION O AWOS NON-FED Figure A-3. ASOS and AWOS Locations - NWS Western Region (northern half) AC 00-45F (July 2008) Appendix A: ASOS and AWOS Locations Page 10-3

Page 350OCROpen in PDF

Aviation Weather Services, Advisory Circular 00-45F, Revision 1 ASOS and AWOS Locations CEC SIY •

ACV MHS AAT

• RDD

• RBL WMC • LGU

OBAM EKO LMNTN O BMC OVE ENV EAGLE O 102 MYV BLU RNO • SLC KNFL GRNPK AUN P68 → PVU VEL SCK O 003 ELY OSTA PUC TPH

MLF CNY MRY SNS MAE BIH NAFB2

CHO FAT CDC BCE

VIS SGU BDG O^ZC KNID VGT • LAS "PGA O PBY

• SMX EAFB1 SBA

DAG IGM CMA VNY BUR • PMD RQE KNTD SMO, CQT CNO ONT L35 KNXP EED FLG

PSP PRO O SEZ NVC- AVX « SNA OKB TRM BLH O PAN SUN KNUC \ CRQ- • RNM DVT SAN → ENKX KNJK KNZY/ * IPL PHX " O CHD

KNRS SDM CZZ KNYL # CoZ SAD OE14 RYN O+ TUS FHU

OLS O DUG NATIONAL WEATHER SERVICE • ASOS + AWOS FED JUNE 2005 WESTERN REGION • AWOS NON-FED

MIRS GIS GROUP Figure A-4. ASOS and AWOS Locations - NWS Western Region (southern half) AC 00-45F (July 2008) Appendix A: ASOS and AWOS Locations Page 10-4

Page 351OCROpen in PDF

Aviation Weather Services, Advisory Circular 00-45F, Revision 1 ASOS and AWOS Locations

ISN MOT N60

DIK BIS MAS FAR BPP BWP O

MBG ABR P60 COD *DOT GEY • SHR ATY WRL • BYG • OSPF PIR HON BKX JAC CUT PHP MHE + FSD RIW BPI • LND CPR DOW CDR • YKN DEMM RKS RWL TOR •BFF ALA DONL P EVW •LAR OLU FET TQE *CYS SNY 2 OMA CAG • # O HDN LXN +§ GRY AUH MLE EEO 3MW ENL GXY ORDE LNK OBIE DEN OFTO FNB • GUT * 055M LXV 4BM APA CBK HLO RILY MHK TOP TEX O GUC O TEM cOS • •AFAC1 • PUB LHX LAA TQK HYS RSL GBD OMPR SLN FRI FOE IXD OJC 04V GCK EWK EMP CEZ DRO 2K3 ULS • DDC • AAO CNU

• EGE TAD SPD 00 ICT • PPF

LBL WLD IDP O& CFV NATIONAL WEATHER SERVICE • ASOS

• AWOS FED OCTOBER 2004 CENTRAL REGION • AWOS NON-FED

MIRS GIS GROUP Figure A-5. ASOS and AWOS Locations - NWS Central Region (western half) AC 00-45F (July 2008) Appendix A: ASOS and AWOS Locations Page 10-5

Page 352OCROpen in PDF

Aviation Weather Services, Advisory Circular 00-45F, Revision 1 ASOS and AWOS Locations DD O O ELO

• 8 7KO M21

• M58 *UNO NATIONAL WEATHER SERVICE • ASOS

AWOS FED OCTOBER 2004 CENTRAL REGION • AWOS NON-FED

MIRS GIS GROUP Figure A-6. ASOS and AWOS Locations - NWS Central Region (eastern half) AC 00-45F (July 2008) Appendix A: ASOS and AWOS Locations Page 10-6

Page 353OCROpen in PDF

Aviation Weather Services, Advisory Circular 00-45F, Revision 1 ASOS and AWOS Locations

• FMN SKX ARTN CAO • GUY * PNC • BVO GUP GNT LAM • SAF LVS DHT BGD O 0K78 SWO 0F8 • GOK O& TUL RVS MKO

ABQ CQC TCC AMA CSM HBR OKC O PWA RKR

ADH MLC

IKR OUN

CVN CDS LAW FDR

OPYW HHW F05 TCS OSRR ROW • LBB OGLE † PRX

SVC OATS O ALM AFW. *DAL O SLR DMN O LRU CNM sww ABI MWL • KNFW GKY RBDCRS 49T TRL ASL MDD GGG

ELP BWD MAF ACT Of OCH LFK PSN SJT • TSTC BBD ILE*+ TPL UTS MRF * 0 E38 SOAO JCT BMQ• #TO4 CLL • CxO T820 *AUS ATT O DWH ВРТ DRT ERVO HDO SAT " BAZ HYL+ O 11R 3T5 SGRO •IAH ноу,

• SSF VCT LBX • GLS PSX COT KNMT RKP.

KNOG" CRP. "

ALI / KNGP

O KNOIS KNVT HBV BRO

• ASOS + AWOS FED

O AWOS NON-FED Puerto Rico and Virgin Islands

NATIONAL WEATHER SERVICE OCTOBER 2004 SOUTHERN REGION

MIRS GIS GROUP Figure A-7. ASOS and AWOS Locations - NWS Southern Region (western half) AC 00-45F (July 2008) Appendix A: ASOS and AWOS Locations Page 10-7

Page 354OCROpen in PDF

Aviation Weather Services, Advisory Circular 00-45F, Revision 1 ASOS and AWOS Locations

JAU TRI QO SAA XNA 1- HOO ROG 0 OPHT • HZD YOOT" DO GKTY GCY

NAK OMB MMI FSM 00. 0OSNH CONN

• CYD

• ASOS + AWOS FED

• AWOS NON-FED Puerto Rico and Virgin Islands

NATIONAL WEATHER SERVICE SJU STT IRCH 20 SOUTHERN REGION STX

RS GIS GROI Figure A-8. ASOS and AWOS Locations - NWS Southern Region (eastern half) AC 00-45F (July 2008) Appendix A: ASOS and AWOS Locations Page 10-8

Page 355OCROpen in PDF

Aviation Weather Services, Advisory Circular 00-45F, Revision 1 ASOS and AWOS Locations FVE CAR • + PQI HUL MLT Ò3B1 EPM *ONR BGR HIE 5B2 DDH scHO, DAQW ORE

ALB BAF ORH SFZ

• PSF IAG •ROC •NOS 1810 IJD

PEO HFDO ACK

• BID

• DKK OLE _SHW ERI IPT O*ZL (12N TEB GKJ SEC OPER INDO WOOL TIN LM 79PN ABE USMO EWR RDG , PTW "KNXX

BTP CXY MDT LNS AOO 40N PHL O HMZ +

AFJ WWD NATIONAL WEATHER SERVICE • ASOS + AWOS FED OCTOBER 2004 EASTERN REGION • AWOS NON-FED

MIRS GIS GROUP Figure A-9. ASOS and AWOS Locations - NWS Eastern Region (northern half) AC 00-45F (July 2008) Appendix A: ASOS and AWOS Locations Page 10-9

Page 356OCROpen in PDF

Aviation Weather Services, Advisory Circular 00-45F, Revision 1 ASOS and AWOS Locations HZY YNG

• CLE

TOL TDZ DFI ILG

HOR O EVY OXB Owes

• AND GRD CUB MYR CRE CAE •*

CAIK OGB GOEO NEXC NATIONAL WEATHER SERVICE • ASOS OCTOBER 2004 EASTERN REGION • AWOS NON-FED + AWOS FED

MIRS GIS GROUP Figure A-10. ASOS and AWOS Locations - NWS Eastern Region (southern half) AC 00-45F (July 2008) Appendix A: ASOS and AWOS Locations Page 10-10

Page 357Open in PDF

Aviation Weather Services, Advisory Circular 00-45F, Revision 1 AC 00-45F (July 31, 2008) Appendix B: Contractions and Acronyms Page 11-1 11 APPENDIX B: CONTRACTIONS AND ACRONYMS

A

AAA (or AAB, AAC…etc., in sequence) Amended meteorological message (message type designator) AAWU Alaskan Aviation Weather Unit ABNDT Abundant ABNML Abnormal ABT About ABV Above AC Altocumulus or Convective Outlook ACARS Aircraft communication and addressing system ACC Altocumulus Castellanus ACCID Notification of an aircraft accident ACCUM Accumulate ACFT Aircraft ACPY Accompany ACRS Across ACSL Altocumulus Standing Lenticular ACT Active or activated or activity ACYC Anticyclone ADA Advisory area ADDN Addition or additional ADJ Adjacent ADQT Adequate ADQTLY Adequately ADRNDCK Adirondack ADVCT Advect ADVCTD Advected ADVCTG Advecting ADVCTN Advection ADVCTS Advects ADVN Advance ADVNG Advancing ADVY Advisory ADVYS Advisories AFCT Affect AFCTD Affected AFCTG Affecting AFT After…(time or place) AFTN Afternoon AFSS Automated Flight Service Station AGL Above ground level AGN Again AGRD Agreed AGRS Agrees AGRMT Agreement AHD Ahead AIREP Air-report AIRMET Airman’s Meteorological Information (Information concerning en-route weather phenomena which may affect the safety of low-level aircraft operations) AK Alaska AL Alabama 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) AMDG Amending AMDT Amendment AMP Amplify AMPG Amplifying AMPLTD Amplitude AMS AMSL Above mean sea level AMT Amount ANLYS Analysis ANS Answer AOA At or above AOB At or below

Page 358Open in PDF

Aviation Weather Services, Advisory Circular 00-45F, Revision 1 AC 00-45F (July 2008) Appendix B: Contractions and Acronyms Page 11-2

AP

Airport or anomalous propagation APCH Approach APCHG Approaching APCHS Approaches APLCN Appalachian APLCNS Appalachians APPR Appear APPRG Appearing APPRS Appears APR April APRNT Apparent APRX Approximate or approximately AR Arkansas ARFOR Area Forecast (in aeronautical meteorological code) ARND Around AS Altostratus ASC Ascend to or ascending to ASSOCD Associated ASSOCN Association AT… At (followed by time at which weather change is forecast to occur) ATLC Atlantic ATP At…(time or place) ATTM At this time ATTN Attention AUG August AVBL Available or availability AVG Average AWC Aviation Weather Center AWT Awaiting AZ Arizona AZM Azimuth

B

BACLIN Baroclinic BAJA Baja, California BASE Cloud base BATROP Barotropic BC British Columbia BCFG Fog patches BCH Beach BCKG Backing BDA Bermuda BDRY Boundary BECMG Becoming BFR Before BGN Begin BGNG Beginning BGN Begins BHND Behind BINOVC Breaks in overcast BKN Broken BL… Blowing (followed by DU = dust, SA = sand or SN = snow) BLD Build BLDG Building BLDUP Buildup BLKHLS Black Hills BLKT Blanket BLKTG Blanketing BLKTS Blankets BLO Below clouds BLW Below… BLZD Blizzard BND Bound BNTH Beneath BR Mist BRF Brief BRK Break BRKG Breaking BRKHIC Breaks in higher clouds BRKS Breaks BRKSHR Berkshire BRM Barometer BLDU Blowing Dust BLSA Blowing Sand BLSN Blowing Snow BTL Between layers BTN Between BYD Beyond

C

C Degrees Celsius (Centigrade) or centre (runway identification) CA California CAA Cold air advection

CAPE

Convective Available

Page 359Open in PDF

Aviation Weather Services, Advisory Circular 00-45F, Revision 1 AC 00-45F (July 2008) Appendix B: Contractions and Acronyms Page 11-3 Potential Energy CARIB Caribbean CASCDS Cascades CAT Category or Clear air turbulence CAVO Visibility, cloud and present weather better than prescribed values or conditions CB Cumulonimbus CC Cirrocumulus CCA (or CCB, CCC…etc., in sequence) Corrected meteorological message CCLDS Clear of clouds CC Counterclockwise CCSL Cirrocumulus Standing Lenticular CDFNT Cold front CDN Coordination CFP Cold front passage CHC Chance CHCS Chances CHG Modification (message type designator) CHGD Changed CHGG Changing CHGS Changes CHSPK Chesapeake CI Cirrus CIG Ceiling CIGS Ceilings CIT Near or over large towns CLA Clear type of ice formation CLD Cloud CLDNS Cloudiness CLDS Clouds CLKWS Clockwise CLR Clear(s) or cleared to…or clearance CLRG Clearing CLRS Clears CLSD Close or closed or closing CM Centimeter CMPLX Complex CNL Cancel or cancelled CNDN Canadian CNTR Center CNTRD Centered CNTRL Central CNTY County CNTYS Counties CNVG Converge CNVGG Converging CNVGNC Convergence CNVTN Convection CNVTV Convective CNVTVLY Convectively CONFDC Confidence CO Colorado COMPR Compare COMPRG Comparing COMPRD Compared COMPRS Compares COND Condition CONS Continuous CONT Continue(s) or continued CONTLY Continually CONTG Continuing CONTRAILS Condensation trails CONTDVD Continental Divide CONUS Continental U.S.

COORD Coordinates COR Correct or correction or corrected (used to indicate corrected meteorological message; message type designator COT At the coast COV Cover or covered or covering CPBL Capable CPC Climate Prediction Center CRLC Circulate CRLN Circulation CRNR Corner CRNRS Corners CRS Course CS Cirrostratus CSDR Consider CSDRBL Considerable CST Coast CSTL Coastal CT Connecticut CTSKLS Catskills CU Cumulus CUFRA Cumulus Fractus COV Cover or covered or covering CWSU Center Weather Service Unit

Page 360Open in PDF

Aviation Weather Services, Advisory Circular 00-45F, Revision 1 AC 00-45F (July 2008) Appendix B: Contractions and Acronyms Page 11-4 CYC Cyclonic CYCLGN Cyclogenesis

D

D Downward (tendency in RVR during previous 10 minutes) DABRK Daybreak DALGT Daylight DBL Double DC District of Columbia DCR Decrease DCRD Decreased DCRG Decreasing DCRGLY Decreasingly DCRS Decreases DE Delaware or from (used to precede the call sign of the calling station) (to be used in AFS as a procedure signal) DEC December DEG Degrees DELMARVA Delaware-Maryland-Virginia DFCLT Difficult DFCLTY Difficulty DFNT Definite DFNTLY Definitely DFRS Differs DGNL Diagonal DGNLLY Diagonally DIF Diffuse DIGG Digging DIR Direction DISC Discontinue DISCD Discontinued DISCG Discontinuing DISRE Disregard DISRED Disregarded DISREG Disregarding DIST Distance DKTS Dakotas DLA Delay or delayed or delay (message type designator) DLT Delete DLTD Deleted DLTG Deleting DLY Daily DMG Damage DMGD Damaged DMGG Damaging DMNT Dominant DMSH Diminish DMSHD Diminished DMSHG Diminishing DMSHS Diminishes DNG Danger or dangerous DNS Dense DNSLP Downslope DNSTRM Downstream DNWND Downwind DOM Domestic DP Dew point temperature DPND Deepened DPNG Deepening DPNS Deepens DPR Deeper DPT Depth DR… Low drifting (followed by DU =dust, SA = sand or SN = snow) DRFT Drift DRFTD Drifted DRFTG Drifting DRFTS Drift DRG During DS Duststorm DSCNT Descent DSIPT Dissipate DSIPTD Dissipated DSIPTG Dissipating DSIPTN Dissipation DSIPTS Dissipates DSND Descend DSNDG Descending DSNDS Descends DSNT Distant DSTBLZ Destabilize DSTBLZD Destabilized DSTBLZG Destabilizing DSTBLZS Destabilizes DSTBLZN Destabilization DTG Date-time group DTRT Deteriorate or deteriorating DU Dust DUC Dense upper cloud DUR Duration DURC During climb