4/20/23 

AIM 

5. 

AIRMETs over Alaska and Hawaii: 

(a) 

AIRMETs over Alaska and Hawaii are in text format. The hazard areas are described using 

well

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known geographical areas. AIRMETs over Alaska are issued for three Alaskan regions corresponding to 

Alaska area forecasts (See FIG 7

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1

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4). 

(b) 

AIRMETs over Alaska are valid up to eight hours. AIRMETs over Hawaii are valid up to six hours. 

Unscheduled issuances contain an update number for easier identification. 

(c) 

AIRMET Zulu describes moderate icing and provides freezing level heights. 

EXAMPLE

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Example of AIRMET Sierra issued for the Southeast Alaska area: 

WAAK47 PAWU 241324 

WA7O 

JNUS WA 241315 

AIRMET SIERRA FOR IFR AND MT OBSC VALID UNTIL 242115 

LYNN CANAL AND GLACIER BAY JB 

MTS OBSC BY CLDS/ISOL PCPN. NC. 

CNTRL SE AK JC 

MTS OCNL OBSC IN CLDS. NC. 

SRN SE AK JD 

PAWG

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PAKT LN W OCNL CIGS BLW 010/VIS BLW 3SM BR. IMPR. 

ERN GLF CST JE 

OCNL CIGS BLW 010/VIS BLW 3SM BR/

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RA BR. DTRT. 

=JNUT WA 241315 

AIRMET TANGO FOR TURB/STG SFC WINDS VALID UNTIL 242115 

ERN GLF CST JE 

OFSHR ICY BAY W SUSTAINED SFC WND 30 KTS 

OR GTR. SPRDG E. INTSF. 

=JNUZ WA 241315 

AIRMET ZULU FOR ICING VALID UNTIL 242115 

ERN GLF CST JE 

16Z TO 19Z ALG CST W ICY BAY OCNL MOD ICEIC 080

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160. 

FZLVL 045 EXC 015 INLAND. WKN. 

EXAMPLE

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Example of AIRMET Tango issued for Hawaii FA area: 

WAHW31 PHFO 241529 

WA0HI 

HNLS WA 241600 

AIRMET SIERRA UPDATE 2 FOR IFR VALID UNTIL 242200 

NO SIGNIFICANT IFR EXP. 

=HNLT WA 241600 

AIRMET TANGO UPDATE 3 FOR TURB VALID UNTIL 242200 

Meteorology 

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