Frost & Freeze Possible Throughout Maine, New Brunswick And Nova Scotia Overnight

URGENT - WEATHER MESSAGE

National Weather Service Gray ME

245 PM EDT Thu May 21 2026

MEZ007-008-NHZ001-002-220645-

/O.CON.KGYX.FZ.W.0003.260522T0300Z-260522T1200Z/

Northern Oxford-Northern Franklin-Northern Coos-Southern Coos-

Including the cities of Davis, Phillips, Upton, Avon, Andover,

Lancaster, Coburn Gore, Colebrook, Oquossoc, Roxbury, Milan,

Kingfield, Wilsons Mills, Byron, Dummer, Errol, Millsfield,

Middle Dam, Rangeley, York Pond, South Arm, and Berlin

245 PM EDT Thu May 21 2026

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 8 AM

EDT FRIDAY...

* WHAT...Sub-freezing temperatures as low as 24 expected.

* WHERE...In Maine, Northern Franklin and Northern Oxford Counties.

  In New Hampshire, Northern Coos and Southern Coos Counties.

* WHEN...From 11 PM this evening to 8 AM EDT Friday.

* IMPACTS...Frost and freeze conditions could kill crops, other

  sensitive vegetation and possibly damage unprotected outdoor

  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

URGENT - WEATHER MESSAGE

National Weather Service Caribou ME

108 PM EDT Thu May 21 2026

MEZ002-005-006-010-220815-

/O.CON.KCAR.FR.Y.0002.260522T0400Z-260522T1100Z/

Northeast Aroostook-Northern Penobscot-Southeast Aroostook-

Central Piscataquis-

Including the cities of Monson, Mars Hill, Millinocket, Ashland,

Houlton, Hodgdon, Greenville, Caribou, Medway, East Millinocket,

Patten, Sherman, Smyrna Mills, Van Buren, Presque Isle, and

Blanchard

108 PM EDT Thu May 21 2026

...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 7 AM

EDT FRIDAY...

* WHAT...Temperatures as low as 30 will result in frost formation.

* WHERE...Central Piscataquis, Northern Penobscot, Southeast

  Aroostook, and Northeast Aroostook Counties.

* WHEN...From midnight tonight to 7 AM EDT Friday.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive

  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

21

9:56 PM ADT Thursday 21 May 2026

Impact Level: Moderate

Forecast Confidence: High

Frost is expected tonight and possibly again on Friday night.

Minimum temperatures: +2 to zero (coolest in low-lying areas).

Time span: early Friday morning.  Possibly reforming Saturday night.

Remarks: Patchy frost is expected to form as clear skies and light winds coincide with cool temperatures, especially in low-lying areas.

Damage to plants, trees, and crops is possible.

Frost advisories are issued when widespread frost or freezing temperatures are expected during the growing season.

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to NBstorm@ec.gc.ca or post reports on X using #NBStorm.

In effect for:

Fredericton and Southern York County

9:52 PM ADT Thursday 21 May 2026

Impact Level: Moderate

Forecast Confidence: High

Frost is expected tonight and possibly again on Friday night.

Minimum temperatures: +4 to zero  (coolest in low-lying inland areas).

Time span: early Friday morning.  Possibly reforming Friday night.

Remarks: Patchy frost is expected to form as clear skies and light winds coincide with cool temperatures, especially in low-lying areas.

Damage to plants, trees, and crops is possible.

Frost advisories are issued when widespread frost or freezing temperatures are expected during the growing season.

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to NSstorm@ec.gc.ca or post reports on X using #NSStorm.

In effect for:

Halifax Metro and Halifax County West