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-------- Original Message --------696 NOUS41 KWBC 042015
PNSWSH
SERVICE CHANGE NOTICE 09-52
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
315 PM EST FRI DEC 4 2008
TO: SUBSCRIBERS:
-FAMILY OF SERVICES
-NOAA WEATHER WIRE SERVICE
-EMERGENCY MANAGERS WEATHER INFORMATION NETWORK
-NOAAPORT
OTHER NWS PARTNERS...AND NWS EMPLOYEES
FROM: ELI JACKS
CHIEF...FIRE AND PUBLIC WEATHER SERVICES BRANCH
SUBJECT: NATIONAL CHANGE IN MINIMUM HAIL SIZE CRITERION
FOR ISSUING SEVERE THUNDERSTORM WARNING /SVR/
AND SEVERE WEATHER STATEMENT SVS/ PRODUCTS
EFFECTIVE JANUARY 5 2010
EFFECTIVE TUESDAY JANUARY 5 2010 AT 0001 COORDINATED UNIVERSAL TIME /UTC/...ALL NWS WEATHER FORECAST OFFICES /WFOS/ WILL OPERATIONALLY CHANGE THE MINIMUM HAIL SIZE CRITERION USED TO ISSUE SEVERE THUNDERSTORM WARNING /SVR/ AND SEVERE WEATHER STATEMENT /SVS/ PRODUCTS FROM 3/4 INCH /PENNY/ DIAMETER OR LARGER HAIL TO 1 INCH /QUARTER/ DIAMETER OR LARGER HAIL.
NO CHANGE IS BEING MADE TO THE SVR AND SVS PRODUCT WIND CRITERION OF WIND GUSTS EQUAL TO OR IN EXCESS OF 50 KNOTS /58 MPH/.
A PUBLIC INFORMATION STATEMENT /PNS/ SOLICITING COMMENTS REGARDING THIS CHANGE WAS ISSUED SEPTEMBER 23 2009 /USE LOWERCASE/:
HTTP://WWW.WEATHER.GOV/OS/NOTIFICATION/PNS09_1_INCH_HAIL.TXTNWS RECEIVED 63 COMMENTS IN RESPONSE TO THE PNS...54 OF WHICH /86 PERCENT/ SUPPORTED THIS CHANGE. A WEB PAGE WILL BE CREATED TO ADDRESS ALL COMMENTS SINCE SOME COMMENTS INDICATED A NEED FOR ADDITIONAL OUTREACH. THIS WEB PAGE WILL BE AVAILABLE BY DECEMBER 15 2009 AND WILL BE PUBLICIZED VIA ANOTHER PNS.
NWS REVIEWED ALL COMMENTS BEFORE DECIDING TO CHANGE MINIMUM HAIL SIZE CRITERION FOR SVR AND SVS PRODUCTS.
CENTRAL AND WESTERN REGION WFOS CURRENTLY ISSUE SVR AND SVS PRODUCTS EXPERIMENTALLY USING THE 1 INCH /QUARTER/ DIAMETER OR LARGER HAIL SIZE CRITERION /USE LOWER CASE/:
HTTP://WWW.NWS.NOAA.GOV/OM/NOTIFICATION/SCN09-19HAIL_CHANGE.TXT AND HTTP://WWW.NWS.NOAA.GOV/OM/NOTIFICATION/SCN09-36WR_HAIL_EXP.TXTTHESE WFOS WILL CONTINUE TO ISSUE 1 INCH /QUARTER/ HAIL SIZE CRITERION PRODUCTS EXPERIMENTALLY THROUGH JANUARY 4 2010. ALL NWS WFOS WILL ADOPT THE NEW CRITERION OPERATIONALLY ON JANUARY 5 2010.
FOR FURTHER INFORMATION REGARDING THIS CHANGE PLEASE CONTACT: JOHN T FERREE FIRE AND PUBLIC WEATHER SERVICES BRANCH 120 DAVID L. BOREN BLVD SUITE 2312 NORMAN OK 73072 405-325-2209 JOHN.T.FERREE@xxxxxxxx NATIONAL SERVICE CHANGE NOTICES ARE ONLINE AT /USE LOWERCASE/: HTTP://WWW.WEATHER.GOV/OS/NOTIF.HTM $$
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