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-------- Original Message --------320 NOUS41 KWBC 071241
PNSWSH
TECHNICAL IMPLEMENTATION NOTICE 06-31...AMENDED
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
742 AM EST TUE NOV 7 2006
TO: NATIONAL WEATHER SERVICE /NWS/ OFFICES
FAMILY OF SERVICES /FOS/ SUBSCRIBERS
FEDERAL AVIATION ADMINISTRATION /FAA/ OFFICES
OTHER NWS AVIATION CUSTOMERS AND PARTNERS
FROM: KEVIN L. JOHNSTON
CHIEF...AVIATION SERVICES BRANCH
SUBJECT: AMENDED STANDARDIZATION OF AIRMET TEXT PRODUCTS ISSUED
FOR THE CONUS EFFECTIVE NOVEMBER 28 2006.
REFER TO: TECHNICAL IMPLEMENTATION NOTICE /TIN/ 06-31TRANSMITTED MAY 12 2006 AND AMENDED TIN 06-31 TRANSMITTED JULY 24 2006. NOTE: THE FOLLOWING IMPLEMENTATION WILL HAVE NO IMPACT ON NOAA WEATHER WIRE SERVICE SUBSCRIBERS.
AMENDED TO SET NOVEMBER 28 2006 AS THE IMPLEMENTATION DATE OF THE STANDARDIZATION OF AIRMET TEXT PRODUCTS ISSUED FOR THE CONUS.
EFFECTIVE TUESDAY NOVEMBER 28 2006 ... BEGINNING AT 1345 COORDINATED UNIVERSAL TIME /UTC/ ... NWS WILL IMPLEMENT FORMAT CHANGES TO STANDARDIZE THE AIRMENS METEOROLOGICAL INFORMATION /AIRMET/ TEXT PRODUCTS. THE PRODUCT IS ISSUED BY THE AVIATION WEATHER CENTER /AWC/ IN KANSAS CITY MISSOURI FOR THE CONTERMINOUS UNITED STATES /CONUS/ AND ADJACENT COASTAL WATERS. SEE TABLE 1 BELOW.
THE FOLLOWING AIRMET STANDARDS WILL BE IMPLEMENTED FOR ALL AIRMETS:
1. THE FREQUENCY OF THE HAZARD OCCURRENCE /OCNL/ AND /FRQ/ WILL NO LONGER BE INCLUDED.
2. TREND REMARKS WILL NO LONGER BE INCLUDED.3. THE 6 TO 12-HOUR FORECAST OUTLOOK AREAS WILL BE DELINEATED WITH HIGH ALTITUDE VOR LOCATIONS PRECEDED WITH THE /BOUNDED BY/ DESCRIPTOR.
4. THE REASON FOR AMENDING ... CORRECTING OR CANCELING AN AIRMET WILL NO LONGER BE INCLUDED.
5. SIGMET REFERENCE STATEMENTS WILL NOT REFER TO THE SIGMET HAZARD. STATEMENTS SUCH AS /FOR AREAS OF POSS SEV TURB/ AND /FOR AREAS OF POSS SEV ICE/ WILL NO LONGER BE INCLUDED. INSTEAD THE STATEMENT /SEE SIGMET XXXX SERIES/ WILL BE USED. FOR EXAMPLE ... /SEE SIGMET TANGO SERIES/.
THE FOLLOWING AIRMET STANDARDS WILL BE IMPLEMENTED FOR ALL AIRMET SIERRA:
1. AIRMET IFR: THE CAUSE OF THE VISIBILITY RESTRICTION WILL BE LIMITED TO /PCPN/ ... /FU/ ... /HZ/ ... /BR/ ... /FG/ AND /BLSN/.
2. AIRMET MTN OBSCN: THE CAUSE OF THE OBSCURATION WILL BE LIMITED TO /CLDS/ ... /PCPN/ ... /FU/ ... /HZ/ ... /BR/ AND /FG/.
THE FOLLOWING AIRMET STANDARDS WILL BE IMPLEMENTED FOR ALL AIRMET TANGO:
1. AIRMET TURB: THE CAUSE OF THE TURBULENCE WILL NO LONGER BE INCLUDED.
2. AIRMET STG SFC WND: THE CAUSE AND DIRECTION OF THE WIND WILL NO LONGER BE INCLUDED.
3. LLWS POTENTIAL: WILL INCLUDE A LIST OF AFFECTED STATES.4. LLWS POTENTIAL: WILL BE DELINEATED USING HIGH ALTITUDE VOR LOCATIONS PRECEDED BY THE /BOUNDED BY/ DESCRIPTOR.
5. LLWS POTENTIAL: LLWS INFORMATION WILL NOT INCLUDE PHRASES SUCH AS /BLW 2000 FT/ OR /BLW AGL 020/.
6. LLWS POTENTIAL: THE CAUSE OF THE LLWS WILL NO LONGER BE INCLUDED.
THE FOLLOWING AIRMET STANDARDS WILL BE IMPLEMENTED FOR ALL AIRMET ZULU:
1. AIRMET ICE: THE ICING TYPES /RIME/ ... /MXD/ AND /CLR/ WILL NO LONGER BE INCLUDED.
2. AIRMET ICE: THE LOCATION OF ICING WITH RESPECT TO CLOUDS AND PRECIPITATION /ICGICIP/ ... /ICGIC/ AND /ICGIP/ WILL NO LONGER BE INCLUDED. INSTEAD THE TERM /ICE/ WILL BE USED.
3. THE FREEZING LEVEL WILL BE DEFINED AS THE LOWEST FREEZING LEVEL ABOVE GROUND LEVEL OR /SFC/ AS APPROPRIATE.
4. FREEZING LEVELS WILL BE DELINEATED USING HIGH ALTITUDE VOR LOCATIONS AT INTERVALS OF 4000 FEET ABOVE MEAN SEA LEVEL OR /SFC/ AS APPROPRIATE. FREEZING LEVEL DESCRIPTIONS WILL NOT INCLUDE STATES ... PORTIONS OF STATES OR GEOGRAPHICAL AREAS.
5. AREAS WITH MULTIPLE FREEZING LEVELS ABOVE THE GROUND WILL BE DELINEATED USING HIGH ALTITUDE VOR LOCATIONS PRECEDED WITH THE /BOUNDED BY/ DESCRIPTOR.
6. THE RANGE OF FREEZING LEVELS OVER THE AREA WILL BE INCLUDED. TABLE 1: PRODUCTS AFFECTED BY THIS CHANGE WMO HEADER AWIPS IDDESCRIPTION PORTION OF CONUS ---------------------------------------------------------- WAUS41 KKCI MKCWA1SAIRMET SIERRANORTHEASTERN WAUS41 KKCI MKCWA1TAIRMET TANGONORTHEASTERN WAUS41 KKCI MKCWA1ZAIRMET ZULUNORTHEASTERN---------------------------------------------------------- WAUS42 KKCI MKCWA2SAIRMET SIERRASOUTHEASTERN
WAUS42 KKCI MKCWA2TAIRMET TANGOSOUTHEASTERN WAUS42 KKCI MKCWA2ZAIRMET ZULUSOUTHEASTERN---------------------------------------------------------- WAUS43 KKCI MKCWA3SAIRMET SIERRANORTH CENTRAL
WAUS43 KKCI MKCWA3TAIRMET TANGONORTH CENTRALWAUS43 KKCI MKCWA3ZAIRMET ZULUNORTH CENTRAL ----------------------------------------------------------
WAUS44 KKCI MKCWA4SAIRMET SIERRASOUTH CENTRAL WAUS44 KKCI MKCWA4TAIRMET TANGOSOUTH CENTRAL WAUS44 KKCI MKCWA4ZAIRMET ZULUSOUTH CENTRAL ---------------------------------------------------------- WAUS45 KKCI MKCWA5SAIRMET SIERRAROCKY MOUNTAIN WAUS45 KKCI MKCWA5TAIRMET TANGOROCKY MOUNTAINWAUS45 KKCI MKCWA5ZAIRMET ZULUROCKY MOUNTAIN ----------------------------------------------------------
WAUS46 KKCI MKCWA6SAIRMET SIERRAPACIFIC COAST WAUS46 KKCI MKCWA6TAIRMET TANGOPACIFIC COAST WAUS46 KKCI MKCWA6ZAIRMET ZULUPACIFIC COASTA DETAILED DESCRIPTION OF THESE CHANGES WITH EXAMPLES MAY BE FOUND ON THE INTERNET AT /USE LOWER CASE LETTERS/: HTTP://AVIATIONWEATHER.GOV/NOTICE/AIRMET/
IF YOU HAVE ANY QUESTIONS CONCERNING THESE CHANGES CONTACT: CLINTON WALLACE CHIEF AVIATION SUPPORT BRANCH AVIATION WEATHER CENTER KANSAS CITY MISSOURI 64153 PHONE: 816-584-7248 E-MAIL: CLINTON.WALLACE@xxxxxxxxTHIS AND OTHER NWS TECHNICAL IMPLEMENTATION NOTICES ARE AVAILABLE ONLINE AT /USE LOWER CASE LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM $$ NNNN -- Linda Miller - lmiller@xxxxxxxxxxxxxxxx Community Services, Unidata University Corporation for Atmospheric Research P.O. Box 3000 Boulder, CO 80307-3000303-497-8646 fax: 303-497-8690
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