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032
NOUS41 KWBC 021910
PNSNMC
NATIONAL TECHNICAL IMPLEMENTATION MESSAGE 98-07
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
200 PM EST THU APR 2 1998
TO: NATIONAL WEATHER SERVICE EMPLOYEES...FAMILY OF SERVICES
SUBSCRIBERS...FEDERAL AVIATION ADMINISTRATION
EMPLOYEES...AND OTHER NWS CUSTOMERS
FROM: THERESE Z. PIERCE
CHIEF-INTEGRATED HYDROMETEOROLOGICAL SERVICES CORE
NWS OFFICE OF METEOROLOGY
SUBJECT: BACKUP OF AVIATION WEATHER CENTER PRODUCTS SCHEDULED
FROM 1300 UTC ON APRIL 7 1998 UNTIL 2100 UTC ON APRIL 7
1998
...THE FOLLOWING CHANGES HAVE NO IMPACT ON NOAA WEATHER WIRE
SUBSCRIBERS...
ON APRIL 7 1998...IN A PLANNED BACK-UP TEST...SIGMETS, AND
AIRMETS/SIERRA...ZULU...TANGO/IN THE BOSTON...MIAMI...CHICAGO...
AND FORT WORTH FA AREAS ...WHICH ARE NORMALLY PREPARED BY THE
AVIATION WEATHER CENTER/AWC WILL BE PREPARED BY THE AIR FORCE
WEATHER AGENCY/AFWA.
IN ACCORDANCE WITH PUBLISHED BACK-UP PROCEDURES...CONVECTIVE
SIGMETS WILL NOT BE ISSUED FOR THE BOS...MIA...CHI OR DFW FA
AREAS DURING THE PERIOD THAT AFWA IS PROVIDING AWC BACKUP.
INFORMATION FOR AREAS OF ACTIVE THUNDERSTORMS WILL BE ISSUED AS
SIGMETS. AN AREA OF ACTIVE THUNDERSTORMS IS DEFINED AS THE
OCCURRENCE OR EXPECTED OCCURRENCE OF AN AREA OF 3000 NAUTICAL
SQUARE MILES OR MORE OF WIDESPREAD CUMULONIMBUS CLOUDS OR
CUMULONIMBUS ALONG A LINE WITH LITTLE OR NO SPACE BETWEEN CLOUDS
OR TO CUMULONIMBUS EMBEDDED IN CLOUD LAYERS OR CONCEALED IN HAZE.
THE BACK-UP WILL TAKE PLACE FOR THE 8-HOUR PERIOD BEGINNING AT
1300 UTC/0700CST.
DURING THE BACK-UP TEST A FORECASTER AT THE AWC IN KANSAS CITY
WILL BE COORDINATING CLOSELY WITH THE AFWA FORECASTER. AWC WILL
BE ABLE TO RESUME FORECASTING SERVICES OR INTERVENE ANYTIME
DURING THE TEST IF NECESSARY. AFTER THE BACKUP TEST IS COMPLETED
THE AREA FORECAST/FA/WILL BE TRANSMITTED BY THE FORECASTER ON
DUTY AT AWC.
THE AFWA WILL PREPARE AND ISSUE
AIRMET "S"...
AFOS IDENTIFIER MKCWA1S/WMO HEADER WAUS1 KBOS
AFOS IDENTIFIER MKCWA2S/WMO HEADER WAUS1 KMIA
AFOS IDENTIFIER MKCWA3S/WMO HEADER WAUS1 KCHI
AFOS IDENTIFIER MKCWA4S/WMO HEADER WAUS1 KDFW
AIRMET "T"...
AFOS IDENTIFIER MKCWA1T/WMO HEADER WAUS1 KBOS
AFOS IDENTIFIER MKCWA2T/WMO HEADER WAUS1 KMIA
AFOS IDENTIFIER MKCWA3T/WMO HEADER WAUS1 KCHI
AFOS IDENTIFIER MKCWA4T/WMO HEADER WAUS1 KDFW
AIRMET "Z"...
AFOS IDENTIFIER MKCWA1Z/WMO HEADER WAUS1 KBOS
AFOS IDENTIFIER MKCWA2Z/WMO HEADER WAUS1 KMIA
AFOS IDENTIFIER MKCWA3Z/WMO HEADER WAUS1 KCHI
AFOS IDENTIFIER MKCWA4Z/WMO HEADER WAUS1 KDFW
SIGMET...
AFOS IDENTIFIER MKCWS1*/WMO HEADER WSUS1 KBOS
AFOS IDENTIFIER MKCWS2*/WMO HEADER WSUS1 KMIA
AFOS IDENTIFIER MKCWS3*/WMO HEADER WSUS1 KCHI
AFOS IDENTIFIER MKCWS4*/WMO HEADER WSUS1 KDFW
URGENT SIGMET...
AFOS IDENTIFIER MKCWS1*/WMO HEADER WSUS1 KBOS
AFOS IDENTIFIER MKCWS2*/WMO HEADER WSUS1 KMIA
AFOS IDENTIFIER MKCWS3*/WMO HEADER WSUS1 KCHI
AFOS IDENTIFIER MKCWS4*/WMO HEADER WSUS1 KDFW
THE ASTERISK /*/ IN THE AFOS IDENTIFIERS FOR THE SIGMENTS AND
URGENT SIGMENTS STANDS FOR NOVEMBER THROUGH YANKEE EXCEPT FOR
SIERRA AND TANGO.
A REMINDER MESSAGE WILL BE APPENDED TO THE BOSTON...MIAMI...
CHICAGO AND FORT WORTH AREA FORECASTS ISSUED ON THE MIDNIGHT
SHIFT THE NIGHT BEFORE THE TEST BEGINS.
THE PLAN IS TO ADD SALT LAKE CITY IN A TEST ON APRIL 28 AND SAN
FRANCISCO IN MAY. AT THAT TIME AFWA WOULD HAVE THE CAPABILITY TO
BACK UP ALL REQUIRED DOMESTIC SIGMETS WHICH WOULD INCLUDE AREAS
OF ACTIVE THUNDERSTORMS AND AIRMETS. INFORMATION REGARDING THESE
TESTS WILL BE PROVIDED IN FUTURE NATIONAL TECHNICAL INFORMATION
MESSAGES.
IF YOU HAVE ANY QUESTIONS CONCERNING THE AWC BACK-UP
TEST...CONTACT
JAMES H. HENDERSON
DEPUTY DIRECTOR, AVIATION WEATHER CENTER
816-426-3427 X 226
E-MAIL: JAMES.H.HENDERSON@xxxxxxxx
END
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