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. A warning 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 or if nighttime low temperatures are above 80°F for 2 consecutive days. 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.[1]
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Example [edit]
The following is an example of a Heat Advisory issued by the National Weather Service office in Memphis, Tennessee.[2]
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
See also [edit]
References [edit]
- ^ National Weather Service. "Heat Advisory". Glossary - National Weather Service. Retrieved 18 May 2011.
- ^ National Weather Service. "Heat Advisory". Iowa Environmental Mesonet NWS Product Archive. Retrieved 18 May 2011.
External links [edit]
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