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NWS Raleigh Frost Freeze Information and Climatology Maps

 

Overview and Definitions:

 

Issuance Policy

Freeze Warning/Watches and Frost Advisories will be issued during the beginning and the ending of the growing season.

 

 

Frost Advisory

A frost advisory is issued when temperatures are forecast to be in the 33°F to 36°F range with good radiation conditions. Typically, frost can occur when the temperature falls below 36°F, especially in rural areas. It is a localized phenomena and can be quite variable across a small area.

 

Freeze Warning/Watch

A freeze warning is issued when minimum temperatures are forecast to be 32°F or less.  Frost becomes more widespread when the temperature falls below 32°F with some freeze possible. A Freeze Watch may be issued a few days ahead of time if the potential exists for temperatures to fall into these thresholds.


Hard Freeze Warning/Watch

A hard freeze warning is issued when temperatures are expected to be 28°F or less.  A Hard Freeze Watch may be issued a few days ahead of time if the potential exists for temperatures to fall into these thresholds.

 

 


 

Climatology

 

When do we normally see our First(Fall) and Last(Spring) 32°F and 28ºF freezes? Check out these maps from the Midwest Regional Climate Center (MRCC) for freeze information on your location. Visit the link to the MRCC to view interactive maps where you can zoom in closer to your specific region.

Earliest/Latest Dates for the First/Fall 32ºF and 28°F Freezes

 

Below are images depicting the median, earliest, and the latest dates for the first 32°F and 28°F freezes across our region. Data is derived from the years 1980 to 2010.

 

 

 

Earliest and Latest Dates for the First/Fall 32ºF Freeze for NWS Raleigh Climate Sites

 
  Earliest Latest
Greensboro Area 10/2/1947 12/1/2009
Raleigh Area 10/2/1947 12/3/1931
Fayetteville Area 10/8/1935 12/3/1985

                     

 

Earliest/Latest Dates for the Last/Spring 32ºF and 28°F Freezes

 

Below are images depicting the median, earliest and the latest dates for the last 32°F and 28°F freezes across our region. Data is derived from the years 1980 to 2010.

 

 

 

Earliest and Latest Dates for the Last/Spring 32ºF Freeze for NWS Raleigh Climate Sites

 

  Earliest Latest
Greensboro Area 3/7/2010 5/8/1989
Raleigh Area 3/1/1935 5/10/1977
Fayetteville Area 3/2/1938 4/26/1919