20001116: Winter Wx Guidance products-ADMIN NOTICE NOUS41 KWBC (fwd)

• To: nws-changes@xxxxxxxxxxxxxxxx
• Subject: 20001116: Winter Wx Guidance products-ADMIN NOTICE NOUS41 KWBC (fwd)
• From: Linda Miller <lmiller@xxxxxxxxxxxxxxxx>
• Date: Thu, 16 Nov 2000 10:19:26 -0700

097
NOUS41 KWBC 161704
PNSWSH

PUBLIC INFORMATION STATEMENT...SERVICE CHANGE NOTICE 00-107
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
1210 PM EST THU NOV 16 2000

TO:       FAMILY OF SERVICES /FOS/ SUBSCRIBERS...NOAA WEATHER
          WIRE SERVICE /NWWS/ SUBSCRIBERS...OTHER NATIONAL
          WEATHER SERVICE /NWS/ CUSTOMERS...NWS EMPLOYEES

FROM:     PAUL STOKOLS...ACTING CHIEF
          FIRE AND PUBLIC WEATHER SERVICES BRANCH

SUBJECT:  PROPOSED CHANGES TO HPC 12 AND 24-HOUR PROBABILISTIC
          WINTER WEATHER GUIDANCE PRODUCTS FOR CERTAIN WESTERN
          AND SOUTHERN STATES...EFFECTIVE DECEMBER 18 2000 AT
          1200 UTC

PENDING USER COMMENTS...THE HYDROMETEOROLOGICAL PREDICTION CENTER
/HPC/...PART OF THE NATIONAL WEATHER SERVICE/S NATIONAL CENTERS
FOR ENVIRONMENTAL PREDICTION...PLANS TO IMPLEMENT PROPOSED
CHANGES TO ITS 12 AND 24-HOUR PROBABILISTIC WINTER WEATHER
GUIDANCE PRODUCTS DURING THE 1200 UTC CYCLE ON DECEMBER 18 2000.

THE HPC PROPOSES TO MODIFY ITS 12 AND 24-HOUR PROBABILISTIC
WINTER WEATHER GUIDANCE PRODUCTS...WMO PRODUCT HEADINGS
PSID41 KWBC...PSID88 KWNH...AND PGII98 KWNH.  THESE CHARTS ARE
ISSUED DURING THE WINTER SEASON AND CURRENTLY DEPICT THE
PROBABILITY OF 4 INCHES OR GREATER OF SNOW AND/OR ONE-QUARTER
INCH OF ICE ACCUMULATION IN TWELVE HOURS OR 6 INCHES OF SNOW
AND/OR ONE-QUARTER INCH OF ICE ACCUMULATION IN 24 HOURS.

FOR THE STATES OF WASHINGTON...OREGON...CALIFORNIA...NEVADA...
ARIZONA...UTAH... IDAHO...THE WESTERN ONE-THIRD OF MONTANA...THE
WESTERN TWO-THIRDS OF WYOMING AND THE WESTERN HALVES OF COLORADO
AND NEW MEXICO:  HPC PROPOSES TO CHANGE THE SNOWFALL THRESHOLDS
USED ON THESE PRODUCTS TO 12 INCHES IN 12 HOURS AND 18 INCHES IN
24 HOURS.

FOR THE STATES OF NORTH CAROLINA EAST OF THE APPALACHIANS...
SOUTH CAROLINA...GEORGIA...FLORIDA...ALABAMA... MISSISSIPPI...
LOUISIANA...ARKANSAS...TENNESSEE...OKLAHOMA EXCLUDING THE
PANHANDLE...AND TEXAS EXCLUDING THE WESTERN HIGH PLAINS:  THE NEW
PROPOSED THRESHOLD WILL BE 2 INCHES IN 12 HOURS AND 4 INCHES IN
24 HOURS.

ALL OTHER AREAS OF THE COUNTRY WILL RETAIN THE 4 INCH THRESHOLD
IN 12 HOURS AND 6 INCHES IN 24 HOURS.  NO CHANGE WILL BE MADE TO
THE ICING THRESHOLD IN ANY OF THE STATES.

PLEASE SEND COMMENTS ON THIS PROPOSAL BY DECEMBER 15 2000 TO THE
FOLLOWING PERSONS:


     DAVID REYNOLDS...CHIEF         -OR-     KEVIN MCCARTHY
     HPC/FORECAST OPERATIONS BRANCH          DEPUTY DIRECTOR...HPC
     301-763-8000 EXT. 7317                  301-763-8000 EXT. 7304
     DREYNOLDS@xxxxxxxxxxxxx                 KMCCARTHY@xxxxxxxxxxxxx


PENDING USER COMMENTS...HPC PLANS TO IMPLEMENT THESE CHANGES
DURING THE 1200 UTC CYCLE ON DECEMBER 18 2000.

ADDITIONAL INFORMATION INCLUDING A GRAPHIC SHOWING THE LOCATION
OF THE BOUNDARIES THAT DIFFERENTIATE THE VARIOUS THRESHOLDS CAN
BE FOUND AT /USE LOWER CASE/:

          WWW.HPC.NCEP.NOAA.GOV/WW/

THIS NOTICE AND OTHER SERVICE CHANGE NOTICES ARE ON THE INTERNET
AT /USE LOWER CASE/

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

END


---------- End Forwarded Message ----------