FREEZE/FROST
type: Concept

LAST FREEZE/FROST PROBABILITY
type: Concept
change note: 2016-07-15 11:19:25.0 [saritz] Move Concepts delete broader relation (null); add broader relation (LAST FREEZE/FROST PROBABILITY [22b3623a-66c6-4616-8a6a-139ce119f672,217709] - FREEZE/FROST1 [4539272a-f041-4fc6-883d-4c4c5bef1683,85025]);
change note: 2016-06-28 13:47:38.0 [saritz] insert Definition (id: null text: The freeze/frost probability levels represent the risk with regard to meeting or falling below a certain temperature threshold by a specific date, or within a specified number of days. For example, suppose a 90 percent probability level for the spring season is computed to be March 1 at the 32 degree threshold. This means that nine years out of ten a temperature as cold or colder than 32 degrees is expected to occur later than March 1 during the spring season. For the fall season, the probability level represents the chance of having a temperature as cold or colder earlier than the computed date. The freeze-free probability level indicates the chance of having a longer freeze-free period than the computed number of days. The methods used to compute the freeze probabilities come from two data distributions: a discrete freeze or no-freeze distribution, where a no-freeze annual season is one in which only one or no freeze occurs; and a continuous one of freeze dates for the years of freeze occurrence, where language code: en);
change note: 2016-06-28 13:47:14.0 [saritz] Insert Concept add broader relation (LAST FREEZE/FROST PROBABILITY [22b3623a-66c6-4616-8a6a-139ce119f672,217709] - FREEZE/FROST [5be5caa4-9f86-47ff-a08f-fb1eb97918b5,217701]);
in scheme: sciencekeywords
definition: The freeze/frost probability levels represent the risk with regard to meeting or falling below a certain temperature threshold by a specific date, or within a specified number of days. For example, suppose a 90 percent probability level for the spring season is computed to be March 1 at the 32 degree threshold. This means that nine years out of ten a temperature as cold or colder than 32 degrees is expected to occur later than March 1 during the spring season. For the fall season, the probability level represents the chance of having a temperature as cold or colder earlier than the computed date. The freeze-free probability level indicates the chance of having a longer freeze-free period than the computed number of days. The methods used to compute the freeze probabilities come from two data distributions: a discrete freeze or no-freeze distribution, where a no-freeze annual season is one in which only one or no freeze occurs; and a continuous one of freeze dates for the years of freeze occurrence, where