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Heat advisory
A Heat Advisory is issued by the National Weather Service of the United States within 12 hours of the heat index reaching one of two criteria levels. In most areas, an advisory will be issued if there is a heat index of at least 105°F but less than 115°F for less than 3 hours per day and/or if nighttime low temperatures are above 80°F for 2 consecutive days. Note that local offices, particularly those where excessive heat is less frequent or in areas with deserts or mountainous terrain, often have their own criteria. High values of the heat index are caused by temperatures being significantly above normal and high humidities, and such high levels can pose a threat to human life through conditions such as heat stroke.
==Example==
The following is an example of a Heat Advisory issued by the National Weather Service office in Memphis, Tennessee.
114
WWUS74 KMEG 111956
NPWMEG
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MEMPHIS TN
256 PM CDT FRI JUN 11 2010
...PROLONGED HOT AND HUMID WEATHER EXPECTED THIS WEEKEND INTO
EARLY NEXT WEEK...
.A DEEP TROPICAL SOUTHERLY FLOW WILL REMAIN IN PLACE AS A LARGE AREA
OF HIGH PRESSURE BUILDS OVER THE LOWER MISSISSIPPI RIVER VALLEY THIS
WEEKEND. HIGHS SATURDAY THROUGH MONDAY SHOULD RANGE FROM THE MID TO
UPPER 90S ACROSS THE ENTIRE MID-SOUTH...WITH DEW POINTS IN THE
LOW TO MID 70S. THIS WILL MAKE FOR HEAT INDEX VALUES AROUND 105
DEGREES EACH DAY.
THE HEAT AND HUMIDITY WILL NOT SUBSIDE MUCH AT NIGHT WITH TEMPERATURES
ONLY DROPPING INTO THE MID 70S IN MOST RURAL AREAS...TO THE LOWER
80S IN DOWNTOWN MEMPHIS. THIS WILL ADD TO THE DANGER FOR PEOPLE
WHO CANNOT FIND A WAY TO ADEQUATELY COOL DOWN.
ARZ008-009-017-018-026>028-035-036-048-049-058-MOZ113-115-
MSZ001>017-020>024-TNZ001>004-019>021-048>055-088>092-120900-
/O.NEW.KMEG.HT.Y.0001.100612T1500Z-100615T0300Z/
RANDOLPH-CLAY-LAWRENCE-GREENE-CRAIGHEAD-POINSETT-MISSISSIPPI-
CROSS-CRITTENDEN-ST. FRANCIS-LEE AR-PHILLIPS-DUNKLIN-PEMISCOT-
DESOTO-MARSHALL-BENTON MS-TIPPAH-ALCORN-TISHOMINGO-TUNICA-TATE-
PRENTISS-COAHOMA-QUITMAN-PANOLA-LAFAYETTE-UNION-PONTOTOC-LEE MS-
ITAWAMBA-TALLAHATCHIE-YALOBUSHA-CALHOUN-CHICKASAW-MONROE-LAKE-
OBION-WEAKLEY-HENRY-DYER-GIBSON-CARROLL-LAUDERDALE-TIPTON-HAYWOOD-
CROCKETT-MADISON-CHESTER-HENDERSON-DECATUR-SHELBY-FAYETTE-
HARDEMAN-MCNAIRY-HARDIN-
INCLUDING THE CITIES OF...WALNUT RIDGE...PARAGOULD...JONESBORO...
HARRISBURG...BLYTHEVILLE...WYNNE...WEST MEMPHIS...FORREST CITY...
HELENA...KENNETT...CARUTHERSVILLE...SOUTHAVEN...OLIVE BRANCH...
CORINTH...IUKA...TUNICA...BOONEVILLE...CLARKSDALE...BATESVILLE...
OXFORD...NEW ALBANY...TUPELO...AMORY...ABERDEEN...UNION CITY...
MARTIN...DRESDEN...PARIS...DYERSBURG...HUMBOLDT...MILAN...
HUNTINGDON...COVINGTON...JACKSON...LEXINGTON...BARTLETT...
GERMANTOWN...COLLIERVILLE...MEMPHIS...MILLINGTON...SOMERVILLE...
BOLIVAR...SAVANNAH
256 PM CDT FRI JUN 11 2010
...HEAT ADVISORY IN EFFECT FROM 10 AM SATURDAY TO 10 PM CDT
MONDAY...
THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A HEAT
ADVISORY...WHICH IS IN EFFECT FROM 10 AM SATURDAY TO 10 PM CDT
MONDAY.
* HIGH TEMPERATURES IN THE MID TO UPPER 90S COMBINED WITH DEW
POINTS IN THE LOW TO MID 70S WILL MAKE FOR PEAK AFTERNOON HEAT
INDEX VALUES OF 103 TO 108 DEGREES SATURDAY THROUGH MONDAY.
LITTLE RELIEF CAN BE EXPECTED AT NIGHT WITH LOWS IN THE MID 70S
IN MOST RURAL LOCATIONS...TO POSSIBLY THE LOWER 80S IN DOWNTOWN
MEMPHIS.
* THE HIGHEST HEAT INDEX VALUES ARE EXPECTED BETWEEN 1 PM AND 7 PM
EACH DAY.
* EXCESSIVE HEAT IS THE NUMBER ONE WEATHER KILLER. WHILE THIS
PART OF THE COUNTRY SEES ITS FAIR SHARE OF SUMMER HEAT...THIS
WILL BE THE FIRST HEAT WAVE OF THE SUMMER SO PEOPLE SHOULD BE
ESPECIALLY PREPARED FOR THE DANGERS EXCESSIVE HEAT POSES. YOUNG
CHILDREN...ELDERLY PEOPLE AND THOSE WITH ILLNESSES OR HEART
CONDITIONS ARE MOST AT RISK. LIMIT OUTDOOR ACTIVITIES TO EARLY
IN THE MORNING OR UNTIL EVENING. IF YOU HAVE A WORKING AIR
CONDITIONER USE IT...OR AT LEAST OPEN WINDOWS AND ALLOW AIR TO
CIRCULATE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES IS
EXPECTED. THE COMBINATION OF HOT TEMPERATURES AND HIGH HUMIDITY
WILL COMBINE TO CREATE A SITUATION IN WHICH HEAT ILLNESSES ARE
POSSIBLE. DRINK PLENTY OF FLUIDS...STAY IN AN AIR-CONDITIONED
ROOM...STAY OUT OF THE SUN...AND CHECK UP ON RELATIVES AND
NEIGHBORS.
&&
$$
BORGHOFF
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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