NOTE: The nws-changes mailing list is no longer active. The list archives are made available for historical reasons.
286
NOUS41 KWBC 281838
PNSWSH
PUBLIC INFORMATION STATEMENT...SERVICE CHANGE NOTICE 00-114
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
135 PM EST TUE NOV 28 2000
TO: FAMILY OF SERVICES /FOS/ SUBSCRIBERS...NOAA WEATHER
WIRE SERVICE /NWWS/ CUSTOMERS...OTHER NATIONAL WEATHER
SERVICE /NWS/ CUSTOMERS...NWS EMPLOYEES
FROM: PAUL STOKOLS...ACTING CHIEF...
FIRE AND PUBLIC WEATHER SERVICES BRANCH
SUBJECT: NEW STORM PREDICTION CENTER PROBABILISTIC SEVERE
WEATHER OUTLOOKS TO COMMENCE JANUARY 31 2001
EFFECTIVE WEDNESDAY JANUARY 31 2001 AT 1130 A.M. EASTERN STANDARD
TIME /EST/ OR 830 A.M. PACIFIC STANDARD TIME /PST/...
1630 UNIVERSAL COORDINATED TIME /UTC/...THE STORM PREDICTION
CENTER WILL BEGIN ISSUING ROUTINE PROBABILISTIC SEVERE WEATHER
OUTLOOK GRAPHICS /SEE TABLE 1/. THESE GRAPHICS WILL PROVIDE
FORECASTS OF SEVERE CONVECTIVE WEATHER THREATS ACROSS THE
CONTIGUOUS 48 STATES...COMPLEMENTING THE EXISTING CATEGORICAL
OUTLOOKS /SLIGHT...MODERATE...OR HIGH RISK OF SEVERE
THUNDERSTORMS/ BY QUANTIFYING THE RISK OF SEVERE WEATHER AND
EXPRESSING FORECAST UNCERTAINTY. PROBABILITIES WILL BE EXPRESSED
AS THE CHANCE OF A FORECAST WEATHER EVENT OCCURRING WITHIN
25 STATUTE MILES OF ANY LOCATION WITHIN A GIVEN AREA.
THE PROBABILITY FORECASTS FOR DAY ONE OUTLOOKS WILL BE ISSUED AT
0600 UTC...1300 UTC...1630 UTC...2000 UTC...AND 0100 UTC. THE
DAY TWO PROBABILITY FORECASTS WILL BE ISSUED AT 0830 UTC AND
1730 UTC. THESE TIMES ARE IN CONJUNCTION WITH CONTINUING STORM
PREDICTION CENTER CATEGORICAL OUTLOOKS.
THE PROBABILITY OUTLOOKS FOR THE 24-HOUR DAY ONE FORECAST WILL
CONSIST OF SEPARATE GRAPHICS FOR TORNADOES...WIND...AND HAIL. THE
PROBABILITIES FOR WIND AND HAIL CORRESPOND TO THE NATIONWIDE NWS
SEVERE HAIL CRITERIA OF 3/4 OF AN INCH OR LARGER DIAMETER AND
SEVERE CONVECTIVE WIND GUST CRITERIA OF 50 KNOTS OR GREATER. THE
PROBABILITY OUTLOOKS FOR THE 24-HOUR DAY TWO FORECAST WILL
CONSIST OF ONE GRAPHIC PROVIDING THE COMBINED PROBABILITY OF
TORNADO AND SEVERE CRITERIA HAIL AND WIND THREATS.
ADDITIONALLY...HIGHLIGHTED AREAS IN EACH OUTLOOK WILL INDICATE
WHERE THERE IS A 10 PERCENT OR GREATER CHANCE OF AN EXTREME
EVENT. AN EXTREME EVENT IS DEFINED AS THE OCCURRENCE OF AN F2 OR
STRONGER TORNADO...TWO INCH OR LARGER HAIL DIAMETER...OR 65 KNOT
OR GREATER CONVECTIVE WIND GUST.
IN ORDER TO RECEIVE THESE NEW REDBOOK GRAPHIC PRODUCTS /LISTED IN
TABLE ONE/...ALL CUSTOMERS MUST IMPLEMENT THE NEW WMO HEADERS IN
THEIR DISSEMINATION SYSTEM/S/ BY JANUARY 31 2001.
TABLE 1. WMO HEADERS FOR EACH NEW PROBABILISTIC SEVERE WEATHER
OUTLOOK.
PROBABILITY OUTLOOK GRAPHIC AWIPS ID WMO HEADER
DAY ONE HAIL FORECAST RBGOH1 PENE00 KWNS
DAY ONE WIND FORECAST RBGOW1 PWNE00 KWNS
DAY ONE TORNADO FORECAST RBGOT1 PGNE00 KWNS
DAY TWO COMBINED SEVERE FORECAST RBGOA2 PGNI00 KWNS
FOR CUSTOMERS WITHOUT REDBOOK GRAPHIC DISPLAY CAPABILITIES...
THESE PRODUCTS ARE AVAILABLE ON THE STORM PREDICTION CENTER
INTERNET SITE /USE LOWER CASE/
HTTP://WWW.SPC.NOAA.GOV
FOR MORE INFORMATION AND EXAMPLES OF THE PROBABILITY OUTLOOKS...
SEE THE STORM PREDICTION CENTER INTERNET SITE /USE LOWER CASE/
HTTP://WWW.SPC.NOAA.GOV/PRODUCTS/OUTLOOK/PROBINFO.HTML
IF YOU HAVE ANY QUESTIONS OR COMMENTS... PLEASE CONTACT EITHER OF
THE FOLLOWING PERSONS:
DR. JOSEPH SCHAEFER DANIEL PETERSEN
STORM PREDICTION CENTER SEVERE STORMS PROGRAM
NORMAN OK SILVER SPRING MD
405-579-0701 301-713-1726 X143
JOSEPH.SCHAEFER@xxxxxxxx DAN.PETERSEN@xxxxxxxx
...NOTE TO INTERNET USERS...
THIS AND ALL OTHER NWS SERVICE CHANGE NOTICES ARE POSTED ON /USE
LOWER CASE/
HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM
END
---------- End Forwarded Message ----------
nws-changes archives: