NOUS41 KWBC 281239
PNSWSH

TECHNICAL IMPLEMENTATION NOTICE 08-27
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
845 AM EDT FRI MAR 28 2008

TO:       NATIONAL WEATHER SERVICE /NWS/ OFFICES
          FEDERAL AVIATION ADMINISTRATION /FAA/ USERS
          FAMILY OF SERVICES /FOS/ SUBSCRIBERS
          WORLD AREA FORECAST SYSTEM /WAFS/ USERS
          OTHER USERS OF NWS AVIATION FORECASTS

FROM:     KEVIN L. JOHNSTON
          CHIEF...AVIATION SERVICES BRANCH

SUBJECT:  BACK-UP TEST OF THE INTERNATIONAL CIVIL AVIATION
          ORGANIZATION /ICAO/ WASHINGTON WORLD AREA
          FORECAST CENTER /WAFC/ HIGH AND MEDIUM LEVEL
          SIGNIFICANT WEATHER PRODUCTS: APRIL 23 2008

NOTE: 	  THE FOLLOWING CHANGES HAVE NO IMPACT ON NOAA WEATHER 
	  WIRE SUBSCRIBERS.

ON WEDNESDAY APRIL 23 2008 FROM 1400 COORDINATED UNIVERSAL TIME 
/UTC/ UNTIL APPROXIMATELY 2100 UTC...THE WAFC LONDON IN THE 
UNITED KINGDOM WILL ASSUME...IN A PLANNED OPERATIONAL BACK-UP 
TEST...FORECAST AND ISSUANCE RESPONSIBILITY FOR THE HIGH LEVEL 
SIGNIFICANT WEATHER /SWH/ AND MEDIUM LEVEL SIGNIFICANT WEATHER 
/SWM/ BUFR AND PNG PRODUCTS NORMALLY PREPARED BY WAFC WASHINGTON 
AT THE AVIATION WEATHER CENTER /AWC/ IN KANSAS CITY MISSOURI.

WAFC LONDON WILL PREPARE AND ISSUE AT 1900 UTC THE FOLLOWING 
BUFR PRODUCTS VALID AT 1200 UTC APRIL 24 2008:

SWH BUFR DATA                      WMO HEADINGS

SWH JETSTREAM                      JUWE96 KKCI
SWH CLEAR AIR TURBULENCE           JUCE00 KKCI
SWH CUMULONIMBUS CLOUD             JUBE99 KKCI
SWH TROPOPAUSE HEIGHT              JUTE97 KKCI
SWH TROP CYC AND VOL ERUPTION      JUVE00 KKCI

WAFC LONDON WILL PREPARE AND ISSUE AT 2100 UTC THE FOLLOWING 
BUFR AND PNG PRODUCTS VALID AT 1200 UTC APRIL 24 2008.  PLEASE 
NOTE THAT THE 2100 UTC ISSUANCE TIME IS ONE HOUR LATER THAN THE 
NORMAL ISSUANCE TIME.

SWM BUFR DATA                      WMO HEADINGS

SWM TROPOPAUSE HEIGHT              JUOE00 KKCI  
SWM JETSTREAM                      JUTE00 KKCI  
SWM IN-CLOUD ICING/TURBULENCE      JUNE00 KKCI  
SWM CLEAR AIR TURBULENCE           JUME00 KKCI  
SWH/SWM PNG CHARTS                 WMO HEADINGS

A                                  PGEE05 KKCI
B1                                 PGIE05 KKCI
F                                  PGGE05 KKCI
H                                  PGAE05 KKCI
I                                  PGBE05 KKCI
J                                  PGJE05 KKCI
M                                  PGDE29 KKCI
NAT                                PGNE14 KKCI


DURING THE BACK-UP TEST...THE WAFC WASHINGTON WILL BE ABLE 
TO RESUME FORECASTING SERVICES OR INTERVENE ANYTIME IF 
NECESSARY.

IF YOU HAVE ANY QUESTIONS CONCERNING THE WAFC WASHINGTON 
BACK-UP TEST...CONTACT:

        LARRY BURCH
        DEPUTY DIRECTOR
        AVIATION WEATHER CENTER
        KANSAS CITY MISSOURI
        PHONE:  816-584-7203
        E-MAIL: LARRY.BURCH@NOAA.GOV

THIS AND OTHER NWS TECHNICAL IMPLEMENTATION NOTICES ARE 
AVAILABLE ONLINE AT /USE LOWER CASE LETTERS/:

   HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM

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