Public Information Statement
Issued by NWS Portland, ME

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PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
700 AM EDT TUE APR 26 2016

THE NATIONAL WEATHER SERVICE HAS DECLARED THE WEEK OF APRIL 25TH
THROUGH 29TH, SEVERE WEATHER AWARENESS WEEK IN NEW ENGLAND.  THIS
IS THE SECOND IN A SERIES OF FIVE PUBLIC INFORMATION STATEMENTS ON
VARIOUS TOPICS RELATED TO SEVERE WEATHER AWARENESS.


...SEVERE WEATHER AWARENESS - THUNDERSTORMS AND LIGHTNING...

ALTHOUGH IT MAY NOT SEEM SO TODAY, SUMMER IS NOT FAR AWAY.
SUMMERTIME IS A GOOD TIME FOR OUTDOOR RECREATIONAL ACTIVITIES IN NEW
ENGLAND; IT IS ALSO THE TIME OF THE YEAR WHEN THUNDERSTORMS ARE MOST
LIKELY. THUNDERSTORMS CAN BE BEAUTIFUL, BUT THEY ALSO CAN BE DEADLY.
WHILE MANY PEOPLE THINK THEY ARE AWARE OF THE DANGERS OF
THUNDERSTORMS AND LIGHTNING, THE VAST MAJORITY ARE NOT.

THERE ARE THREE BASIC INGREDIENTS NEEDED FOR THE FORMATION OF A
THUNDERSTORM.  THEY INCLUDE LOW-LEVEL MOISTURE, AN UNSTABLE
ATMOSPHERE, AND A TRIGGER (A SOURCE OF LIFT).

LOW-LEVEL MOISTURE: THIS MOISTURE IS NEEDED FOR CLOUD FORMATION,
GROWTH, AND THE DEVELOPMENT OF PRECIPITATION WITHIN THE CLOUD.

UNSTABLE ATMOSPHERE:AN UNSTABLE ATMOSPHERE ALLOWS WARM, MOIST AIR
NEAR THE GROUND TO RISE RAPIDLY TO HIGHER LEVELS IN THE ATMOSPHERE
WHERE TEMPERATURES ARE BELOW FREEZING.  AN UNSTABLE ATMOSPHERE ALSO
ALLOWS AIR AT HIGHER LEVELS IN THE ATMOSPHERE TO SINK TO THE GROUND
LEVEL RAPIDLY, BRINGING STRONGER WINDS FROM THE HIGHER LEVELS TO THE
GROUND.

A TRIGGER: SOMETHING TO SET THE ATMOSPHERE IN MOTION.

ALL THREE INGREDIENTS CONTRIBUTE TO THE FORMATION OF A THUNDER-
STORM. IN FACT, AS THE MAGNITUDES OF THESE INGREDIENTS INCREASE,
SO DO THE CHANCES THAT A THUNDERSTORMS COULD BECOME SEVERE.

IN THE SUMMERTIME, LISTEN TO THE LATEST FORECAST AND LEARN TO
RECOGNIZE THE SIGNS THAT OFTEN PRECEDE THUNDERSTORM DEVELOPMENT.

WARM MUGGY AIR IS A SIGN THAT AMPLE LOW-LEVEL MOISTURE IS
AVAILABLE FOR THUNDERSTORM DEVELOPMENT.  TOWERING CUMULUS CLOUDS
INDICATE AN ATMOSPHERE THAT IS, OR IS BECOMING, UNSTABLE.  AND,
THE TRIGGER COULD BE CONTINUED HEATING FROM THE SUN; AN
APPROACHING FRONT OR SEA BREEZE FRONT; OR A COOLING OF THE UPPER
ATMOSPHERE.

ALL THUNDERSTORMS GO THROUGH VARIOUS STAGES OF GROWTH AND
DEVELOPMENT. AS A THUNDERSTORM CLOUD CONTINUES TO GROW, SNOW AND
ICE BEGIN TO FORM IN THE MIDDLE AND HIGHER LEVELS OF THE CLOUD
WHERE TEMPERATURES ARE BELOW FREEZING, AND ELECTRICAL CHARGES
START TO BUILD UP WITHIN THE CLOUD.  NEGATIVE ELECTRICAL CHARGES
NEAR THE MIDDLE OF THE THUNDERSTORM CLOUD CAUSE POSITIVE CHARGES
TO BUILD UP ON THE GROUND UNDER AND NEAR THE THUNDERSTORM.
FINALLY, WHEN THE DIFFERENCE BETWEEN THESE CHARGES BECOMES TOO
GREAT, A GIANT ATMOSPHERIC SPARK WE CALL LIGHTNING OCCURS.

LIGHTNING IS AN UNDERRATED KILLER, USUALLY CLAIMING ITS VICTIMS
ONE AT A TIME.  LIGHTNING ALSO LEAVES MANY VICTIMS WITH LIFE-
LONG SERIOUS INJURIES.  LIGHTNING CAN STRIKE AS FAR AS 10 MILES
FROM THE SIDE OF THE THUNDERSTORM CLOUD.  IN FACT, MANY
LIGHTNING VICTIMS ARE STRUCK BEFORE THE RAIN ARRIVES OR AFTER
THE RAIN HAS ENDED.  MANY VICTIMS ALSO REPORT THAT AT LEAST A
PORTION OF THE SKY WAS BLUE WHEN THEY WERE STRUCK.  DURING THE
PAST 10 YEARS, MAINE HAS HAD 3 LIGHTNING FATALITIES WHILE NEW
HAMPSHIRE HAS NOT HAD ANY.  ALTHOUGH MAINE HAS LESS LIGHTNING
THAN MOST STATES EAST OF THE ROCKY MOUNTAINS, MAINE RANKS QUITE
HIGH IN TERMS OF LIGHTNING DEATHS PER CAPITA.

THIS SUMMER, THE NATIONAL WEATHER SERVICE WILL PARTICIPATE IN A
NATIONWIDE AWARENESS CAMPAIGN TO REDUCE THE NUMBER OF DEATHS AND
INJURIES FROM LIGHTNING.  ALTHOUGH MORE INFORMATION ON LIGHTNING
AND LIGHTNING SAFETY WILL BE PROVIDED DURING LIGHTNING SAFETY
AWARENESS WEEK, THE LAST FULL WEEK IN JUNE, HERE ARE SOME BASIC
TIPS TO HELP KEEP YOU AND YOUR FAMILY SAFE THIS SUMMER.

WHILE INSIDE A HOME OR BUILDING

  1.AVOID ANY CONTACT WITH ELECTRICAL OR ELECTRONIC EQUIPMENT OR
CORDS THAT ARE PLUGGED INTO THE ELECTRICAL SYSTEM.
  2. AVOID ANY CONTACT WITH CORDED PHONES.
  3. AVOID ANY CONTACT WITH THE PLUMBING SYSTEM.  DO NOT WASH
YOUR HANDS, DO NOT WASH THE DISHES, DO NOT TAKE A SHOWER,
OR DO NOT DO LAUNDRY.
  4. DO NOT STAND NEXT TO A CONCRETE WALL AND DO NOT LIE ON A
CONCRETE FLOOR.
  5. STAY AWAY FROM WINDOWS, OUTSIDE DOORWAYS, AND PORCHES.

TIPS WHILE OUTDOORS

  1. THERE IS NO SAFE PLACE OUTSIDE IN A THUNDERSTORM.  TO BE SAFE,
YOU MUST GET INSIDE A SUBSTANTIAL BUILDING OR HARD-TOPPED METAL
VEHICLE.
  2. PLAN OUTSIDE ACTIVITIES SO THAT YOU MINIMIZE THE RISK OF
BEING CAUGHT OUTSIDE IN A THUNDERSTORM.
  3. IF YOU HEAR THUNDER, MOVE INSIDE A SAFE SHELTER IMMEDI-
ATELY.  GENERALLY, IF YOU CAN HEAR THE THUNDER, YOU`RE
WITHIN STRIKING DISTANCE OF THE STORM.
  4. IF THE SKY LOOKS THREATENING, MOVE INSIDE IMMEDIATELY.
DON`T WAIT FOR THE FIRST FLASH OF LIGHTNING.  IT COULD
OCCUR ANYWHERE UNDER OR NEAR THE STORM.
  5. STAY INSIDE A SAFE SHELTER FOR AT LEAST 30 MINUTES AFTER
THE LAST RUMBLE OF THUNDER WAS HEARD.  MANY LIGHTNING
VICTIMS ARE STRUCK AFTER THE WORST PART OF THE STORM HAS
PASSED.

REMEMBER, WHEN IT COMES TO THUNDERSTORM SAFETY, IT`S YOUR OWN
ACTIONS THAT WILL DETERMINE YOUR PERSONAL RISK OF BEING KILLED
OR SERIOUSLY INJURED BY THE HAZARDS THAT ACCOMPANY
THUNDERSTORMS.

HERE IS A LIST OF THE OTHER TOPICS THAT HAVE BEEN OR WILL BE
COVERED IN PUBLIC INFORMATION STATEMENTS ISSUED BY THE NATIONAL
WEATHER SERVICE THIS WEEK.

MONDAY......SOME BASIC DEFINITIONS
WEDNESDAY...SEVERE THUNDERSTORMS - DOWNBURSTS, MICROBURSTS,
            AND HAIL
THURSDAY....TORNADOES
FRIDAY......FLASH FLOODS

$$

JENSENIUS
NATIONAL WEATHER SERVICE
GRAY, MAINE

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