Excessive Heat Warning 2, NWS Tucson, AZ

423 
WWUS75 KTWC 142118
NPWTWC

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE TUCSON AZ
218 PM MST FRI AUG 14 2015

...VERY HOT MID AUGUST TEMPERATURES TODAY THROUGH SUNDAY...

AZZ501-502-504-505-151200-
/O.CON.KTWC.EH.W.0002.000000T0000Z-150815T0300Z/
/O.CON.KTWC.EH.W.0003.150815T1900Z-150816T0300Z/
/O.CON.KTWC.EH.W.0004.150816T1900Z-150817T0300Z/
WESTERN PIMA COUNTY-TOHONO O'ODHAM NATION-TUCSON METRO AREA-
SOUTH CENTRAL PINAL COUNTY-
INCLUDING THE CITIES OF...AJO...ORGAN PIPE CACTUS N.M....SELLS...
TUCSON...GREEN VALLEY...MARANA...VAIL...PICACHO PEAK STATE PARK
218 PM MST FRI AUG 14 2015

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...
...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM NOON TO 8 PM MST
SATURDAY...
...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM NOON TO 8 PM MST
SUNDAY...

* AFFECTED AREAS...SOUTH-CENTRAL PINAL COUNTY AND MOST OF PIMA 
  COUNTY...INCLUDING THE TUCSON METRO AREA...ELOY...PICACHO... 
  SELLS...AJO AND ORGAN PIPE CACTUS NATIONAL MONUMENT. 

* TEMPERATURES...108 TO 113 DEGREES EACH DAY WEST AND NORTHWEST 
  OF TUCSON. 107 TO 111 DEGREES IN THE TUCSON METRO AREA. 

* IMPACTS...THESE HOT HIGH TEMPERATURES CAN CAUSE HEAT RELATED
  ISSUES...INCLUDING DEATH IF APPROPRIATE MITIGATION ARE NOT TAKEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AN EXCESSIVE HEAT WARNING MEANS THAT A PROLONGED PERIOD OF
EXTREMELY HOT TEMPERATURES WILL OCCUR. TAKE EXTRA PRECAUTIONS IF
YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE...RESCHEDULE
STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS
AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT
WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY
OF WATER.

THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS
THESE ADDITIONAL STEPS TO REDUCE RISK DURING OUTDOOR WORK...
SCHEDULE FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED
ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL
AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY...CALL 911.

&&

$$
CERNIGLIA

VISIT US ON FACEBOOK...TWITTER...YOUTUBE...AND AT WEATHER.GOV/TUCSON

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
227 AM MST THU AUG 14 2015

.SYNOPSIS...HIGH PRESSURE ALOFT BUILDING INTO THE REGION FROM THE
EAST WILL BRING VERY HOT HIGH TEMPERATURES THROUGH THIS WEEKEND WITH
OVERALL LIMITED THUNDERSTORM ACTIVITY. SOME MOISTURE WILL BRIEFLY
RETURN TO THE AREA EARLY NEXT WEEK BRINGING AN UPTICK IN AFTERNOON
AND EVENING SHOWERS AND THUNDERSTORMS.

&&

.DISCUSSION...LATEST WV IMAGERY SHOWS STRONG RIDGING ALOFT WITH AN
H5 HIGH OF ABOUT 598 DM CENTERED OVER NEW MEXICO. SOUTHEAST ARIZONA
REMAINS ON THE SOUTHWEST PERIPHERY OF THE HIGH WITH CONTINUED
SOUTHEAST FLOW ALOFT. LATEST CIRA LAYERED PRECIPITABLE WATER PRODUCT
AND GPS STATIONS INDICATE PWAT VALUES OF ABOUT 1 TO 1.3 INCHES
ACROSS THE AREA WHICH IS FAIRLY SIMILAR TO WHAT THE 00Z/14 KTWC
SOUNDING HAD. THERE IS STILL CONSIDERABLE MID LEVEL CLOUDINESS
ACROSS MUCH OF SOUTHEAST ARIZONA AND EVEN A FEW VERY LIGHT
SHOWERS...BUT EXPECT THIS TO GRADUALLY DISSIPATE THROUGH THE EARLY
MORNING HOURS. AS THE UPPER HIGH NUDGES WEST OVER THE NEXT COUPLE OF
DAYS...THUNDERSTORM ACTIVITY WILL CONTINUE TO BE LIMITED WITH JUST
SLIGHT CHANCES MAINLY IN THE AFTERNOON AND EVENING HOURS THROUGH
SATURDAY AS THERE IS MARGINAL MOISTURE AND MID LEVEL SUBSIDENCE FROM
THE HIGH. IN FACT...AS THE HIGH MOVES WEST THE MAIN STORY WILL BE
THE RECORD HEAT ACROSS MANY LOCATIONS. HAVE GONE AHEAD AND CONVERTED
THE EXCESSIVE HEAT WATCH TO A WARNING FOR TODAY...SATURDAY AND
SUNDAY.

BY SUNDAY...THE MID/UPPER LEVEL HIGH WILL HAVE PUSHED FAR ENOUGH
WEST FOR A MORE NORTHERLY FLOW ALOFT ON THE EASTERN FLANK OF THE
HIGH. AS SOME ADDITIONAL MOISTURE MOVES INTO FAR SOUTHEAST PORTIONS
OF THE STATE...PERHAPS A FEW MORE STORMS ACROSS EASTERN SECTIONS
COMING OFF THE MOGOLLON RIM SUNDAY AND MONDAY. MEANWHILE...
TEMPERATURES WILL GRADUALLY COOL OFF NEXT WEEK AS THE HIGH WEAKENS
AND PUSHES TO THE SOUTH AND WEST. WHATEVER MOISTURE INCREASE WE DO
SEE ON SUNDAY AND MONDAY MIGHT BE SOMEWHAT SHORT LIVED AS THE FLOW
PATTERN BECOMES A BIT MORE UNFAVORABLE WITH DRIER AIR TRYING TO
ADVECT IN FROM THE NORTHWEST DURING THE MIDDLE OF NEXT WEEK WITH A
LOW GRADE MONSOON PATTERN.

&&

.AVIATION...VALID THRU 15/12Z.
EXPECT ISOLATED -TSRA/-SHRA INTO EARLY SATURDAY MORNING. BRIEF WIND
GUSTS OF 35-45 KTS WILL OCCUR WITH THE STRONGER TSRA. OTHERWISE...
CLOUD DECKS WILL GENERALLY BE ABOVE 10K FT AGL AND SURFACE WIND WILL
BE LESS THAN 10 KTS THRU THE PERIOD. AVIATION DISCUSSION NOT UPDATED
FOR TAF AMENDMENTS.

&&

.FIRE WEATHER...STRONG HIGH PRESSURE ALOFT WILL PROVIDE WELL ABOVE
NORMAL TEMPERATURES WITH ONLY ISOLATED THUNDERSTORMS THROUGH
SATURDAY. ISOLATED TO SCATTERED THUNDERSTORMS WILL THEN OCCUR SUNDAY
THROUGH TUESDAY. EXPECT ANOTHER DOWNTURN IN THUNDERSTORM ACTIVITY
ALONG WITH MODERATING DAYTIME TEMPERATURES WEDNESDAY AND THURSDAY.
OUTSIDE OF THUNDERSTORM WIND GUSTS...20-FT WINDS WILL GENERALLY BE
LESS THAN 15 MPH.

&&

.CLIMATE...WITH THE UPCOMING MID-AUGUST HEAT WAVE WE HAVE POSTED ON
OUR WEBSITE RECORD TEMPERATURE INFORMATION FOR PORTIONS OF SE AZ.

&&

.TWC WATCHES/WARNINGS/ADVISORIES...
  EXCESSIVE HEAT WARNING IN EFFECT FOR FRIDAY...SATURDAY AND SUNDAY
  AFTERNOON AND EVENING FOR AZZ501-502-504-505

&&

VISIT US ON FACEBOOK...TWITTER...YOUTUBE...AND AT WEATHER.GOV/TUCSON