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NOUS41 KWBC 231753
PNSWSH
SERVICE CHANGE NOTICE 04-27
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
155 PM EDT FRI APR 23 2004
TO: FAMILY OF SERVICES /FOS/ SUBSCRIBERS...NOAA WEATHER
WIRE SERVICE /NWWS/ SUBSCRIBERS... EMERGENCY MANAGERS
WEATHER INFORMATION NETWORK /EMWIN/ SUBSCRIBERS...
NOAAPORT SUBSCRIBERS... OTHER NATIONAL WEATHER SERVICE
/NWS/ CUSTOMERS... PARTNERS...AND USERS OF THE FIRE
WEATHER FORECAST...NWS EMPLOYEES
FROM: JAMES E. LEE
CHIEF...FIRE AND PUBLIC WEATHER SERVICES BRANCH
SUBJECT: COMBINED SEVERE THUNDERSTORM AND FLASH FLOOD WARNINGS
TO BE ISSUED IN SOUTHWESTERN UNITED STATES THIS MONSOON
SEASON: EFFECTIVE JULY 1 2004
EFFECTIVE THURSDAY JULY 1 2004 AT 1200 COORDINATED UNIVERSAL TIME
/UTC/...NATIONAL WEATHER SERVICE /NWS/ WEATHER FORECAST OFFICES
/WFO/ IN THE SOUTHWESTERN U.S. WILL BEGIN ISSUING COMBINED SEVERE
THUNDERSTORM AND FLASH FLOOD WARNINGS WHEN CONDITIONS MEETING
CRITERIA FOR BOTH TYPES OF WARNINGS OCCUR FROM THE SAME
THUNDERSTORM. NWS WEATHER FORECAST OFFICES PARTICIPATING IN THE
COMBINED WARNING PROGRAM AND THE AFFECTED PRODUCTS ARE SHOWN IN
TABLE 1.
THE COMBINED WARNINGS AND FOLLOW-UP STATEMENTS WILL BE ISSUED
USING THE FLASH FLOOD WARNING /FFW/ AND FLOOD STATEMENT /FLS/
IDENTIFIERS.
THE COMBINED WARNINGS WILL BE IMPLEMENTED AS PART OF THE FIELD
TESTING OF THE VALID TIME AND EVENT CODE /VTEC/ BY THE NWS THIS
SUMMER. TRADITIONAL FLASH FLOOD WARNINGS WILL CONTAIN A SINGLE
PRIMARY VTEC LINE...WHILE COMBINED WARNINGS WILL CONTAIN TWO
PRIMARY VTEC LINES: ONE FOR THE FLASH FLOOD WARNING AND ONE FOR
THE SEVERE THUNDERSTORM WARNING. FURTHER DETAILS ON THE USE OF
VTEC CODE CAN BE FOUND AT THE FOLLOWING WEB SITE /USE LOWER CASE
LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/OM/VTEC/
EXAMPLES OF THE COMBINED WARNINGS PRODUCT CAN BE SEEN AT THE
FOLLOWING WEB SITE /USE LOWER CASE LETTERS/:
HTTP://WEATHER.GOV/OS/SEVEREWEATHER/COMBINED_WARNING04EXAMPLE.PDF
CUSTOMERS WHO ALREADY RECEIVE NWS FLASH FLOOD WARNINGS DO NOT
HAVE TO MAKE ANY CHANGES IN ORDER TO RECEIVE THE COMBINED
WARNINGS. TABLE 1. SOUTHWESTERN U.S. COMBINED WARNING PRODUCT
HEADERS...EFFECTIVE JULY 1 2004
WMO HEADING AND AWIPS ID
OFFICE WARNING FOLLOW-UP STATEMENT
TUCSON AZ /TWC/ WGUS55 KTWC FFWTWC WGUS85 KTWC FLSTWC
PHOENIX AZ /PSR/ WGUS55 KPSR FFWPSR WGUS85 KPSR FLSPSR
FLAGSTAFF AZ /FGZ/ WGUS55 KFGZ FFWFGZ WGUS85 KFGZ FLSFGZ
LAS VEGAS NV /VEF/ WGUS55 KVEF FFWVEF WGUS85 KVEF FLSVEF
SAN DIEGO CA /SGX/ WGUS56 KSGX FFWSGX WGUS86 KSGX FLSSGX
IF YOU HAVE ANY QUESTIONS REGARDING THESE NEW PRODUCTS...
PLEASE CONTACT:
CRAIG SCHMIDT
DISSEMINATION MANAGER
NATIONAL WEATHER SERVICE
WESTERN REGION HEADQUARTERS
125 SOUTH STATE STREET ROOM 1311
SALT LAKE CITY UT 84138
PHONE: 801-524-4000 X266
E-MAIL: CRAIG.SCHMIDT@xxxxxxxx
THIS AND OTHER NWS SERVICE CHANGE NOTICES ARE AVAILABLE ONLINE
AT /USE LOWER CASE LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM
$$
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