Full Notification

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE ST LOUIS MO
311 PM CDT MON AUG 18 2014

...DANGEROUS LEVELS OF HEAT AND HUMIDITY RETURN TO THE BI-STATE AREA...

.HIGH LEVELS OF HEAT AND HUMIDITY ARE EXPECTED TO BUILD INTO THE
BI-STATE AREA BEGINNING ON WEDNESDAY...AND CONTINUING THROUGHOUT
THE REMAINDER OF THE WEEK AND INTO NEXT WEEKEND. SINCE THIS SUMMER
HAS BEEN RELATIVELY COOL...THESE SUMMERTIME LEVELS OF HEAT AND
HUMDIITY WILL FEEL ESPECIALLY OPPRESIVE...AND POTENTIALLY
DANGEROUS. THE GREATEST IMPACT WILL BE FELT IN THE URBAN HEAT
ISLAND OF THE ST LOUIS METRO AREA.

ILZ100-101-MOZ063-064-191000-
/O.NEW.KLSX.EH.A.0001.140820T1800Z-140825T0000Z/
MADISON IL-ST. CLAIR IL-ST. LOUIS CITY MO-ST. LOUIS MO-
INCLUDING THE CITIES OF...BELLEVILLE...EDWARDSVILLE...ST LOUIS
311 PM CDT MON AUG 18 2014

...EXCESSIVE HEAT WATCH IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH SUNDAY EVENING...

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED AN EXCESSIVE
HEAT WATCH...WHICH IS IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
SUNDAY EVENING.

* TIMING...DANGEROUS LEVELS OF HEAT AND HUMIDITY WILL BEGIN ON
  WEDNESDAY AFTERNOON...AND WILL CONTINUE FOR THE REST OF THE WEEK
  AND INTO NEXT WEEKEND.

* HEAT INDEX VALUES...AROUND 105 DUE TO TEMPERATURES IN THE MID TO
  UPPER 90S...AND DEWPOINTS IN THE LOWER 70S.

* IMPACTS...THE LIKELY COMBINATION OF HOT TEMPERATURES AND HIGH
  HUMIDITY WILL LEAD TO AN INCREASED RISK OF HEAT-RELATED STRESS
  AND ILLNESS. THE VERY YOUNG... THE ELDERLY...THOSE WITHOUT AIR
  CONDITIONING...AND THOSE PARTICIPATING IN STRENUOUS OUTDOOR
  ACTIVITIES WILL BE THE MOST SUSCEPTIBLE. ALSO...CAR INTERIORS
  CAN REACH LETHAL TEMPERATURES IN A MATTER OF MINUTES.

AN EXCESSIVE HEAT WATCH IS ISSUED WHEN A PROLONGED PERIOD OF HIGH
TEMPERATURES AND HUMIDITY IS EXPECTED. THIS WILL CREATE A
DANGEROUS SITUATION IN WHICH HEAT-RELATED ILLNESSES ARE POSSIBLE.
BEGIN MAKING PREPARATIONS NOW...BY MAKING SURE YOUR AIR
CONDITIONING IS IN GOOD WORKING ORDER OR KNOW WHERE TO GO TO STAY
COOL.