Winter Storm Orlena Update Three

Coastal Hazard Message

National Weather Service Gray ME

356 PM EST Sun Jan 31 2021

MEZ023-024-NHZ014-010800-

/O.NEW.KGYX.CF.A.0002.210202T1600Z-210203T1000Z/

Coastal York-Coastal Cumberland-Coastal Rockingham-

356 PM EST Sun Jan 31 2021

...COASTAL FLOOD WATCH IN EFFECT FROM TUESDAY MORNING THROUGH

LATE TUESDAY NIGHT...

* WHAT...Minor coastal flooding is possible in vulnerable low-

  lying coastal areas. The potential exists for moderate wave

  impacts to include significant splash-over, in addition to dune

  and beach erosion.

* WHERE...In New Hampshire, Coastal Rockingham County. In Maine,

  Coastal York and Coastal Cumberland Counties.

* WHEN...From Tuesday morning through late Tuesday night.

* IMPACTS...Numerous roads may be closed. Low lying property

  including homes, businesses, and some critical infrastructure

  may be inundated. Some shoreline erosion may occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If travel is required, allow extra time as some roads may be

closed. Do not drive around barricades or through water of

unknown depth. Take the necessary actions to protect flood-prone

property.

&&

Time of high total tides are approximate to the nearest hour.

Hampton Harbor NH

MLLW Categories - Minor 11.0 ft, Moderate 12.0 ft, Major 13.0 ft

MHHW Categories - Minor 1.5 ft, Moderate 2.5 ft, Major 3.5 ft

20

             Total      Total    Departure

 Day/Time    Tide       Tide     from Norm   Waves    Flood

            ft MLLW    ft MHHW       ft       ft      Impact

 --------  ---------  ---------  ---------  -------  --------

 31/01 PM     9.3       -0.2       -0.3        3       None

 01/01 AM     8.6       -0.9       -0.2        2       None

 01/02 PM     9.7        0.2        0.3       4-7      None

 02/02 AM    10.6        1.1        1.6      12-15     None

 02/03 PM    11.3        1.8        2.2      9-11     Minor

 03/03 AM    11.0        1.5        2.0       6-7     Minor

Seavey Island / Portsmouth NH

MLLW Categories - Minor 11.5 ft, Moderate 12.5 ft, Major 13.5 ft

MHHW Categories - Minor 2.7 ft, Moderate 3.7 ft, Major 4.7 ft

             Total      Total    Departure

 Day/Time    Tide       Tide     from Norm   Waves    Flood

            ft MLLW    ft MHHW       ft       ft      Impact

 --------  ---------  ---------  ---------  -------  --------

 31/01 PM     9.0        0.2       -0.3       0-1      None

 01/02 AM     8.4       -0.4       -0.1        0       None

 01/02 PM     9.4        0.6        0.3        1       None

 02/02 AM    10.2        1.4        1.6       1-2      None

 02/03 PM    11.0        2.2        2.1       3-4      None

 03/03 AM    10.9        2.1        2.2        2       None

Portland ME

MLLW Categories - Minor 12.0 ft, Moderate 13.0 ft, Major 14.0 ft

MHHW Categories - Minor 2.3 ft, Moderate 3.3 ft, Major 4.3 ft

             Total      Total    Departure

 Day/Time    Tide       Tide     from Norm   Waves    Flood

            ft MLLW    ft MHHW       ft       ft      Impact

 --------  ---------  ---------  ---------  -------  --------

 31/01 PM    11.0        1.3        0.5        2       None

 01/01 AM    10.5        0.8        0.8        1       None

 01/01 PM    11.4        1.7        1.0       2-3      None

 02/02 AM    11.8        2.1        2.0      7-12      None

 02/02 PM    12.2        2.5        2.2       8-9     Minor

 03/03 AM    12.0        2.3        2.1       5-6     Minor

&&

$$