Public Information Statement
Issued by NWS Caribou, ME

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Public Information Statement
National Weather Service Caribou ME
448 PM EDT Fri Sep 1 2017

...NORTHERN AND EASTERN MAINE AUGUST 2017 CLIMATE NARRATIVE...

AUGUST 2017 ACROSS NORTHERN AND EASTERN MAINE FINISHED WITH NEAR TO
SLIGHTLY BELOW AVERAGE TEMPERATURES FOR THE MONTH AND SIGNIFICANTLY
BELOW AVERAGE PRECIPITATION.

AVERAGE TEMPERATURES FOR THE MONTH RANGED FROM 3 TENTHS OF A DEGREE
ABOVE AVERAGE AT CARIBOU TO 1.2 DEGREES BELOW AVERAGE AT
MILLINOCKET.  MOST AREAS OBSERVED TEMPERATURES THAT RANGED FROM 1
DEGREE BELOW AVERAGE TO AVERAGE. THE MONTH FEATURED ALTERNATING
SPELLS OF BELOW AND ABOVE AVERAGE TEMPERATURES THAT RANGED FROM A
FEW DAYS TO A WEEK, BUT NO EXTREME HEAT WAS OBSERVED, AND THERE
WERE NO 90 DEGREE DAYS AT ANY OF THE LONG TERM CLIMATE SITES.
THERE WERE A TOTAL OF 12 NIGHTS WITH LOWS IN THE 40S AT CARIBOU,
WHICH WAS 3 ABOVE AVERAGE. AT BANGOR, SIX OF THE LAST 7 NIGHTS OF
THE MONTH HAD LOWS IN THE 40S. THE NORTHWEST VALLEYS OBSERVED A
COUPLE OF NIGHTS WITH LOWS AROUND FREEZING LATE IN THE MONTH,
WHICH IS NOT ALL THAT UNUSUAL IN LATE AUGUST.

TOTAL RAINFALL WAS WELL BELOW AVERAGE AND RANGED FROM 25 TO 70
PERCENT OF OF AVERAGE ACROSS THE REGION. OF ALL THE MAJOR CLIMATE
LOCATIONS IN OUR AREA, HOULTON WAS THE ONLY LOCATION TO HAVE A
MONTHLY DEFICIT OF LESS THAN AN INCH.  IT RANKED AS THE 18TH DRIEST
AUGUST ON RECORD AT CARIBOU AND THE 17TH DRIEST AT BANGOR, BUT
MILLINOCKET WITH ONLY 1.14" OF RAIN RANKED AS THE 7TH DRIEST ON
RECORD. BY THE END OF AUGUST, THE DOWNEAST REGION NORTH INTO PARTS
OF SOUTHERN AROOSTOOK COUNTY WERE IN MODERATE DROUGHT ACCORDING TO
THE U.S. DROUGHT MONITOR.

THE OFFICIAL OUTLOOK FOR THE MONTH OF SEPTEMBER FROM THE CLIMATE
PREDICTION CENTER FOR THE REGION IS TILTED JUST SLIGHTLY TOWARDS
ABOVE AVERAGE TEMPS WITH AN INCREASED LIKELIHOOD OF ABOVE AVERAGE
PRECIPITATION. AVERAGE TEMPERATURES DROP OFF DURING THE MONTH OF
SEPTEMBER WITH HIGHS AT CARIBOU FALLING FROM 71 DEGREES ON THE 1ST
TO 60 DEGREES BY THE END OF THE MONTH.  AVERAGE LOWS DROP FROM 49 ON
THE FIRST TO 40 BY THE END OF THE MONTH.  AT BANGOR, AVERAGE HIGHS
FALL FROM 75 DEGREES ON THE 1ST TO 64 BY THE END OF THE MONTH.
AVERAGE LOWS FALL FROM 53F ON THE 1ST TO 42F ON THE 39TH.  AVERAGE
RAINFALL RANGEs FROM AROUND 3.3 TO 3.8 INCHES.

FROST IS POSSIBLE AT ANYTIME DURING THE MONTH ACROSS NORTHERN AREAS,
BUT BECOMES INCREASINGLY LIKELY DURING THE 2ND HALF OF THE MONTH.
ACROSS DOWNEAST AREAS, FROST IS LESS LIKELY DURING THE FIRST HALF OF
THE MONTH, BUT BECOMES INCREASINGLY LIKELY TOWARD THE END OF THE
MONTH.  SNOW IS RARE IN SEPTEMBER, BUT A TRACE OF SNOW HAS BEEN
OBSERVED AS EARLY AS SEPTEMBER 13, 1963, AT CARIBOU. SEPTEMBER IS
THE MOST LIKELY TIME OF THE YEAR FOR THE REGION TO BE IMPACTED BY A
TROPICAL OR EX-TROPICAL SYSTEM.

$$

CB/VJN



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