Lexington, Massachusetts, USA
000 NOUS41 KBOX 281349 PNSBOX CTZ002>004-MAZ002>024-026-RIZ001>008-290149- Public Information Statement National Weather Service Boston/Norton MA 949 AM EDT Thu Sep 28 2023 ...NWS Boston/Norton will continue an experiment this fall to improve services related to the Frost/Freeze Program... The National Weather Services (NWS) Frost/Freeze Program consists of issuing Frost Advisories, Freeze Warnings or Hard Freeze Warnings when cold temperatures potentially threaten tender vegetation and crops during the period of time between the median date of the last Spring Freeze (temperatures at or below 32F) and the median date of the first Fall Freeze. In prior years, the discontinuation of the issuance of Frost/Freeze headlines during the fall was based on the occurrence of a freeze in a weather forecast zone or two weeks after the median first Fall Freeze date if no freeze had occurred. This approach was confusing to many users as meteorological conditions often led to a patchwork ending of the NWS frost/freeze program across adjacent weather forecast zones and NWS forecast areas. The NWS forecast offices serving New England and New York (Burlington VT, Gray ME, Boston/Norton MA, Albany NY, Buffalo NY, Binghamton, NY, New York NY) will continue an experimental program service during the fall of 2023. The purpose of this experimental program is to streamline the Frost/Freeze program for simplified customer usability. This experiment means that Frost/Freeze headlines will be issued for any threat of a frost/freeze up to the 75-90th percentile of the median first Fall Freeze, established by using 30 year temperature averages. More simply, the program end dates are aligned to be up to 10 days after the median first occurrence of 32F or lower temperatures in the fall. The following are the climatologically defined areas across the forecast area served by NWS Boston/Norton, which is most of southern New England, and the associated date at which the frost/freeze alerts will no longer be issued. October 11th: Northwest and North Central MA October 21st: Areas of MA south of the Mass Pike, and into the Merrimack Valley of NE MA. November 1st: North Central and Northeast CT, all of RI, and the remainder of MA (Eastern, Southeast, Cape and Islands) The goal is to streamline the frost/freeze process, by using defined ending dates, which should make it easier and aid in planning decisions for our users. A detailed handout with Median Last Spring and First Fall Freeze climatology can be found at: https://www.weather.gov/media/box/BOXFrost_Freeze_2023.pdf If you have any questions or comments on this experiment, please contact Andy Nash, Meteorologist-in-Charge, at andy.nash@noaa.gov $$
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