AC 00-45H

Change 2Historical

Advisory circular · Aviation Weather Services

Approved
March 6, 2019
Last reviewed
September 13, 2024
This change
CHG 2 of AC 00-45H. This entire document series, all through the H Revision, is canceled.
Family
AC 00-45 · 10 versions
Revision
H, change 2
14 CFR parts
25, 91

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

Show pages 333–344
Page 345OCROpen in PDF

Appendix C APPENDIX C. DENSITY ALTITUDE CALCULATION To determine density altitude:

1. Set the aircraft's altimeter to 29.92 inches of Mercury. The altimeter will indicate pressure altitude.

2. Read the outside air temperature.

3. Mark the intersection of pressure altitude (horizontal) and temperature (vertical) lines on the chart.

4. Read the density altitude from the diagonal lines.

Figure C-1. Density Altitude Computation Chart 20,000 + + +

STANDARD ATMOSPHERE + + + + + +

DENSITY ALTITUDE 15,000 + 15,000 10,000 + + 10,000 5,000 ‡ 5,000 + + + + + - 5,000 + + + _+ + + -5,000 -50 -40 -30 -20 -10 Temperature °C 0°C 10 20 30 40 50 -50 -40 20 Q°F 2° Temperature °F 40 60 80 100 120 C-1

Page 346Open in PDF

Appendix D D-1 APPENDIX D. INTERNET LINKS Table D-1. Selected National Weather Service (NWS) Links

NWS WEBSITE LINKS National Weather Service (NWS) Aviation Digital Data Service (ADDS) Aviation Weather Center (AWC) Storm Prediction Center (SPC) Alaska Aviation Weather Unit (AAWU) Center Weather Service Units (CWSU) Weather Forecast Office (WFO) Weather Forecast Office (WFO) Honolulu, HI –Aviation Products Table D-2. Selected Federal Aviation Administration (FAA) Links

FAA WEBSITE LINKS Federal Aviation Administration (FAA) Air Traffic Control System Command Center (ATCSCC) Flight Service Operations

Page 347OCROpen in PDF

Appendix E APPENDIX E. WSR-88D WEATHER RADAR NETWORK Figure E-1. WSR-88D Weather Radar Network Sites KATE KCBW КОІХ KMSK KGGW *KMBX OKMVX KDLH

OKIFX OKBIS GIX KELX KABR O KCRB d KRIW KUDX KFSDO KARY КИКУ :ĆỂR KEUF © KBGM- EBE KLŘX KNIX KCYS KLYX KOAX O KLOT KCLEO «кссх / OKRGK KFTGO ÖKUEX IL O 1) KISX| KIND OKILN KRLX

• KMUX O KCLD ÖKEAX OKAKQ © KHNK KEIR KI CE KPUX O KDDCO OKIC Ö KSGF KRAX" KVBX O KEYXO O KVTX KABX KVNE KINS OKSEX KNQI *коНі OKLIX © KNKX KYUX KIWA KF SX кніх KFDX СКАМА ÖKLBB OKFDR OKTLX KLZK KCWKO КВИХ KMXX O КЕРС RJCx • ОКСАЕ OKCLX КЕМХ SKEPZ KMAF • KDYXO OKFWS OKSHV КРОЕ KJAN KEOXO O EVAI

RICH LPLA кАлт KGRK * кихСя КМОВ OKMLE

KOPX KEWX KHGX KTBWO O KAMX

PAECO PAPD OKCRP O KBRO PAHC - О РИКУ PINO KBYX T CER RKSGIO PAIH PHKM O

POTA (O RKIK E-1

Page 348Open in PDF

Advisory Circular Feedback Form If you find an error in this AC, have recommendations for improving it, or have suggestions for new items/subjects to be added, you may let us know by contacting the Flight Technologies and Procedures Division at 9-AWA-AFS-400-COORD@faa.gov or the Flight Standards Directives Management Officer at 9-AWA-AFB-140-Directives@faa.gov.

Subject: AC 00-45H CHG 2, Aviation Weather Services Date: _____________________ Please check all appropriate line items:

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