Public Information Statement
Issued by NWS Caribou, ME

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PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CARIBOU ME
1100 AM EDT TUE JUL 15 2014

THE NATIONAL WEATHER SERVICE OFFICES IN NEW ENGLAND HAVE DECLARED
THE WEEK OF JULY 14TH THROUGH 18TH HURRICANE PREPAREDNESS WEEK. THIS
IS THE SECOND IN A SERIES OF FIVE PUBLIC INFORMATION STATEMENTS TO
BE ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN CARIBOU,
CONTAINING INFORMATION ON HURRICANES AND HURRICANE SAFETY.

HURRICANE WINDS AND TORNADOES

BOTH HURRICANES AND TROPICAL STORMS PRODUCE DANGEROUS WINDS THAT CAN
PRODUCE LIFE-THREATENING CONDITIONS TO THOSE WHO ARE CAUGHT IN THEM.
HURRICANE-FORCE WINDS AN EASILY DESTROY POORLY-CONSTRUCTED BUILDINGS
AND MOBILE HOMES. DEBRIS SUCH AS SIGNS, ROOFING MATERIAL, AND SMALL
ITEMS LEFT OUTSIDE CAN BECOME FLYING MISSILES IN HURRICANES.
EXTENSIVE DAMAGE CAUSED BY FALLING TREES CAN LEAD TO LENGTHY POWER
AND PHONE OUTAGES.

TROPICAL CIRCULATIONS ARE CLASSIFIED BASED ON THE FOLLOWING WIND
SPEED CRITERIA:

        WIND SPEED                  NAME
    LESS THAN 39 MPH (34 KT)     TROPICAL DEPRESSION
    39 TO 73 MPH (34 TO 63 KT)   TROPICAL STORM
    74 MPH (64 KT) OR GREATER    HURRICANE

HURRICANES ARE FURTHER DIVIDED INTO 5 CATEGORIES BASED ON THE
DESTRUCTIVE POWER OF THEIR WINDS. THE SCALE USED IN HURRICANE
CLASSIFICATION IS CALLED THE SAFFIR-SIMPSON SCALE. BELOW IS A LIST
OF THE SAFFIR-SIMPSON SCALE AND THE TYPICAL DAMAGE THAT OCCURS. IT
SHOULD BE NOTED THAT A STORM`S CATEGORY IS NOT A GOOD INDICATOR OF
STORM SURGE OR INLAND FLOODING SEVERITY. THESE EFFECTS WILL BE
DISCUSSED IN GREATER DETAIL LATER THIS WEEK.

SAFFIR-SIMPSON SCALE

CATEGORY     DEFINITION/EFFECTS
    1        WINDS: 74-95 MPH (64-82 KT)
             VERY DANGEROUS WINDS WILL PRODUCE SOME DAMAGE:
             WELL-CONSTRUCTED FRAME HOMES COULD HAVE DAMAGE TO ROOF,
             SHINGLES, VINYL SIDING AND GUTTERS. LARGE BRANCHES OF
             TREES WILL SNAP AND SHALLOWLY-ROOTED TREES MAY BE
             TOPPLED. EXTENSIVE DAMAGE TO POWER LINES AND POLES
             LIKELY WILL RESULT IN POWER OUTAGES THAT COULD LAST A
             FEW TO SEVERAL DAYS.

    2        WINDS: 96-110 MPH (83-95 KT)
             EXTREMELY DANGEROUS WINDS WILL CAUSE EXTENSIVE DAMAGE:
             WELL-CONSTRUCTED FRAME HOMES COULD SUSTAIN MAJOR ROOF
             AND SIDING DAMAGE. MANY SHALLOWLY-ROOTED TREES WILL BE
             SNAPPED OR UPROOTED AND BLOCK NUMEROUS ROADS.
             NEAR-TOTAL POWER LOSS IS EXPECTED WITH OUTAGES THAT
             COULD LAST FROM SEVERAL DAYS TO WEEKS.

    3        WINDS: 111-129 MPH (96-112 KT)
             DEVASTATING DAMAGE WILL OCCUR:
             WELL-BUILT FRAME HOMES MAY INCUR MAJOR DAMAGE OR
             REMOVAL OF ROOF DECKING AND GABLE ENDS. MANY TREES WILL
             BE SNAPPED OR UPROOTED, BLOCKING NUMEROUS ROADS.
             ELECTRICITY AND WATER WILL BE UNAVAILABLE FOR SEVERAL
             DAYS TO WEEKS AFTER THE STORM PASSES.

    4        WINDS: 130-156 MPH (113-136 KT)
             CATASTROPHIC DAMAGE WILL OCCUR:
             WELL-BUILT FRAME HOMES CAN SUSTAIN SEVERE DAMAGE WITH
             LOSS OF MOST OF THE ROOF STRUCTURE AND/OR SOME EXTERIOR
             WALLS. MOST TREES WILL BE SNAPPED OR UPROOTED AND POWER
             POLES DOWNED. FALLEN TREES AND POWER POLES WILL ISOLATE
             RESIDENTIAL AREAS. POWER OUTAGES WILL LAST WEEKS TO
             POSSIBLY MONTHS. MOST OF THE AREA WILL BE UNINHABITABLE
             FOR WEEKS OR MONTHS.

    5        WINDS: 157 MPH OR GREATER (137 KT OR GREATER)
             CATASTROPHIC DAMAGE WILL OCCUR:
             A HIGH PERCENTAGE OF FRAMED HOMES WILL BE DESTROYED,
             WITH TOTAL ROOF FAILURE AND WALL COLLAPSE. FALLEN TREES
             AND POWER POLES WILL ISOLATE RESIDENTIAL AREAS. POWER
             OUTAGES WILL LAST FOR WEEKS TO POSSIBLY MONTHS. MOST OF
             THE AREA WILL BE UNINHABITABLE FOR WEEKS OR MONTHS.

HURRICANES CAN ALSO PRODUCE TORNADOES THAT ADD TO THE STORM`S
DESTRUCTIVE POWER. TORNADOES ARE MOST LIKELY TO OCCUR TO THE RIGHT
SIDE OF THE HURRICANE`S TRACK, THOUGH THEY CAN ALSO FORM IN THE RAIN
BANDS, WELL AWAY FROM THE HURRICANE`S CENTER. STUDIES HAVE SHOWN
THAT MORE THAN HALF OF LAND-FALLING HURRICANES PRODUCE AT LEAST ONE
TORNADO. IN GENERAL THOUGH, TORNADOES ASSOCIATED WITH HURRICANES ARE
LESS INTENSE THAN THOSE THAT OCCUR IN THE GREAT PLAINS. NONETHELESS,
THE EFFECTS OF TORNADOES, ADDED TO THE LARGER AREA OF
HURRICANE-FORCE WINDS, CAN PRODUCE SUBSTANTIAL DAMAGE. FORTUNATELY,
HURRICANE-SPAWNED TORNADOES ARE INFREQUENT IN NORTHERN NEW ENGLAND.

QUESTION OF THE DAY: HOW OFTEN DO WE GET HURRICANES OF EACH CATEGORY
IN MAINE?

THE NATIONAL HURRICANE CENTER ESTIMATES "RETURN PERIODS" FOR THE
VARIOUS CATEGORIES OF HURRICANES FOR LOCATIONS ALONG THE EAST AND
GULF COASTS. IN THIS DETERMINATION, THE LIKELIHOOD OF THE CENTER OF
A HURRICANE PASSING WITHIN 75 MILES OF A LOCATION IS ESTIMATED.
HOWEVER, BECAUSE NORTHERN NEW ENGLAND DOES NOT HAVE MANY STRONG
HURRICANES, IT IS DIFFICULT TO DETERMINE THE FREQUENCY OF THE
STRONGER HURRICANES. FOR THE MID AND DOWNEAST COAST OF MAINE:

CATEGORY        RETURN PERIOD         CHANCE OF EVENT OCCURRING IN
                                             ANY GIVEN YEAR
   1               30 YEARS                       3.3%
   2              100 YEARS                       1.0%
   3              200 YEARS                       0.5%


FACT FOR THE DAY: THE STRONGEST WINDS IN A TROPICAL STORM OR
HURRICANE USUALLY OCCUR ON THE RIGHT SIDE OF THE TRACK. IF A
TROPICAL SYSTEM MAKES LANDFALL ON THE NORTHERN NEW ENGLAND COAST,
THE STRONGEST WINDS WILL BE TO THE EAST OF THE CENTER OF THE STORM.
IN CONTRAST, MOST OF THE PRECIPITATION FALLS ON THE LEFT SIDE OF THE
STORM TRACK. HURRICANE GLORIA, WHICH MADE LANDFALL OVER LONG ISLAND
AND SOUTHERN CONNECTICUT AND TRAVELED WEST OF PORTLAND, PRODUCED
WIND GUSTS OF 70 MPH IN PORTLAND, BUT PRODUCED ONLY 0.41 INCHES OF
RAINFALL IN THE CITY.

HERE`S A LIST OF TOPICS TO BE COVERED LATER THIS WEEK:
  WEDNESDAY - STORM SURGE AND MARINE SAFETY
  THURSDAY - INLAND FLOODING
  FRIDAY - THE FORECAST PROCESS: STATEMENTS, WATCHES, AND WARNINGS

FOR ADDITIONAL INFORMATION ABOUT HURRICANES AND HURRICANE SAFETY,
VISIT THE NATIONAL HURRICANE CENTER`S WEBSITE AT (ALL LOWER-CASE):

HTTP://WWW.NHC.NOAA.GOV

$$

HASTINGS








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