...JULY HIGHLIGHTS...
...ALL-TIME CONSECUTIVE DAY STREAK OF 100 DEGREE HIGHS THREATENED...
...3RD WARMEST DAILY LOW TEMPERATURES ON RECORD OCCUR ON 5TH/6TH...
...MONSOON 2007 BEGAN ON JULY 8TH...
...WET MICROBURST DOES EXTENSIVE DAMAGE IN ORO VALLEY ON 18TH...
...6TH WETTEST JULY ON RECORD...

CONSECUTIVE DAYS WITH HIGHS ABOVE 100 DEGREES...A SLIGHTLY LATER
THAN AVERAGE START TO THE SUMMER THUNDERSTORM SEASON...DRY THEN
WET MICROBURSTS PRODUCING DAMAGING WINDS...HEAVY RAIN AND FLASH
FLOODING WERE THE MAIN WEATHER HIGHLIGHTS TO JULY 2007.

THE MONTH STARTED OFF AS JUNE ENDED...HOT...AS THE AREA WAS IN THE
MIDDLE OF ONE OF THE LONGEST STREAKS OF CONSECUTIVE DAYS WITH HIGH
TEMPERATURES 100 DEGREES OR GREATER. HIGH TEMPERATURES BETWEEN THE
FIRST AND 7TH RANGED FROM 105 TO 110 DEGREES. A BIT OF MID LEVEL
MOISTURE MOVED IN AS THE UPPER HIGH WAS SETTING UP FOR THE ANNUAL
MONSOON. THIS LIMITED MOISTURE COMBINED WITH THE HOT TEMPERATURES
ON THE 5TH AND 6TH TO PRODUCE DRY MICROBURST IN THE EVENING. POWER
LINES WERE DOWNED AT ON THE 5TH AT SEVERAL LOCATIONS (CAMPBELL AND
ROGER...STONE AND ROGER...STONE AND COUNTRY CLUB). DURING THIS
PERIOD...THE SURFACE DEWPOINT VALUES STARTED CREEPING TOWARD THE
MAGICAL 54 DEGREE DAILY AVERAGE. THE AVERAGE DAILY DEWPOINT FIRST
EXCEEDED 54 DEGREES ON THE 8TH (57) THEN THE 9TH RECORDED 57 DEGREES
AND THE 10TH RECORDED 56 DEGREES. THUS THE START OF THE MONSOON
REVERTED TO THE 8TH...THE THE FIRST OF THREE CONSECUTIVE DAYS EQUAL
OR GREATER THAN 54 DEGREES. THIS IS SLIGHTLY LATE WHEN COMPARED TO
THE AVERAGE OF JULY 3RD. THE AVERAGE START DATE FOR THE 2000-2007
PERIOD IS JULY 7TH.

THE 100 DEGREES OR GREATER CONSECUTIVE DAY STREAK CONTINUED INTO ITS
FIFTH WEEK AS MONSOONAL FLOW ALOFT CONTINUED TO SLOWLY BRING IN
MOISTURE ACROSS THE AREA. THUNDERSTORM ACTIVITY BETWEEN THE 10TH AND
16TH WAS ISOLATED WHILE DAYTIME TEMPERATURES WARMED UP BETWEEN 105
AND 108 DEGREES.

THUNDERSTORM ACTIVITY BEGAN TO BECOME MORE SCATTERED AND STARTED TO
PRODUCE MORE RAIN ACROSS THE AREA ON THE 17TH AND 18TH. A WET
MICROBURST MOVED OFF THE CATALINA MOUNTAINS ON THE AFTERNOON OF THE
18TH HIT ORO VALLEY WITH 50 TO 75 MPH WIND SPEEDS ALONG WITH VERY
HEAVY RAIN. EXTENSIVE DAMAGE OCCURRED AT THE ORO VALLEY COUNTRY CLUB
WHERE AROUND 100 TREES WERE EITHER UPROOTED OR SNAPPED. ADDITIONAL
TREE DAMAGE OCCURRED ACROSS ORO VALLEY. ON THE 19TH...A SEVERE
THUNDERSTORM ON THE SOUTHEAST SIDE PRODUCED A DUST STORM THAT MOVED
THROUGH THE CITY FROM SOUTHEAST TO NORTHWEST. VISIBILITIES IN THE
DUST STORM WAS DOWN TO A AS LOW AS A QUARTER OF A MILE. ADDITIONAL
SEVERE THUNDERSTORMS ON THE 19TH DOWNED TREES AND POWER LINES
THROUGH THE CITY. DUE TO THE INCREASED MOISTURE AND THUNDERSTORM
ACTIVITY...THE 19TH WAS THE LAST DAY OF 100+ DEGREE HIGH
TEMPERATURES. THIS ENDED THE 3RD LONGEST STREAK ON RECORD.

TOP 3 LONGEST CONSECUTIVE DAY STREAKS OF HIGHS 100+ DEGREES...
1) 39 DAYS IN 2005 (JUNE 14 TO JULY 22)
   39 DAYS IN 1987 (JUNE 7 TO JULY 15)
3) 37 DAYS IN 2007 (JUNE 12 TO JULY 19)

THE LAST ELEVEN DAYS OF THE MONTH WAS VERY ACTIVE AS THE 2007 MONSOON
WAS IN FULL SWING.

HERE IS A DAILY RECAP...

JULY 21ST...SEVERE THUNDERSTORM DOWN TREES ON THE EAST SIDE. HEAVY
RAIN ALSO CAUSED FLOODING PROBLEMS ON THE EAST SIDE. RAINFALL ACROSS
THE AREA WAS GENERALLY IN THE THREE-QUARTER TO ONE INCHES RANGE WITH
A FEW AREA RECORDING UP TO TWO INCHES AFTER SUNSET.

JULY 23RD...ANOTHER SEVERE THUNDERSTORM HITS THE SOUTHEAST SIDE
RESULTING IN DOWNING OF 12 POWER POLES ALONG HOUGHTON ROAD NEAR
VALENCIA. A SEVERE THUNDERSTORM ALSO HIT MARANA IN THE GLADDEN FARMS
NEIGHBORHOOD RESULTING IN THE DOWNING OF SEVERAL TREES AND SOME ROOF
DAMAGE. HEAVY RAIN ALSO MOVED THE CITY RESULTING IN SEVERAL SWIFT
WATER RESCUES.

JULY 24TH...THE METRO AREA WAS AGAIN HIT WITH SEVERE THUNDERSTORMS
AS THE MOVED NORTH NORTHWEST ACROSS THE CITY. DAVIS MONTHAN AIR FORCE
BASE RECORDED A WIND GUST OT 63 MPH. THE EAST SIDE AND FOOTHILLS
RECORDED THE MOST DAMAGE WITH MANY TREES DOWNED/UPROOTED ALONG WITH
SOME DOWNED POWER POLES. HEAVY RAIN ALSO CAUSED FLASH FLOODING WITH
A SWIFT WATER RESCUE OCCURRING ON THE RILLITO AT DODGE.

JULY 27TH...ANOTHER ROUND OF SEVERE STORMS BROUGHT STRONG DAMAGING 
WINDS TO THE METRO AREA. AN ISOLATED CELL CAUSED THUNDERSTORM WIND 
DAMAGE NEAR BROADWAY AND KOLB...BRINGING SEVERAL TREES DOWN. AS 
ACTIVITY BECAME MORE WIDESPREAD IN THE EVENING DAVIS-MONTHAN AIR 
FORCE BASE RECORDED A 63 MPH WIND GUSTS AND POWER POLES WERE DOWNED 
NEAR GOLF LINKS AND PRUDENCE.  

JULY 28TH...BROUGHT HEAVY RAIN AND LOTS OF FLOODING PROBLEMS TO THE 
TUCSON AREA. WITH OVER AN INCH OF RAINFALL AT THE AIRPORT AND OVER 2 
INCHES AT SOME OTHER GAGE LOCATIONS FLOODING PROBLEMS WERE 
WIDESPREAD. A LARGE SINKHOLE DEVELOPED AT RIVER ROAD AND CRAYCROFT 
DUE TO HEAVY RAINFALL IN A SHORT PERIOD OF TIME. A SWIFT WATER 
RESCUE WAS REQUIRED ON THE SANTA CRUZ RIVER NORTH OF CORTARO ROAD. A 
VEHICLE WAS STUCK IN THE BRAWLEY WASH AT MANVILLE ROAD AND AVRA 
VALLEY ROAD.

JULY 31ST...HEAVY RAINFALL AND STRONG WINDS BROUGHT ANOTHER DOSE OF 
DAMAGE AND FLOODING PROBLEMS TO THE METRO AREA. THE AIRPORT RECEIVED 
ALMOST 1 1/2 INCHES OF RAINFALL ON THIS DAY...RANKING AS THE 2ND 
WETTEST JULY 31ST ON RECORD. NUMEROUS ROADS THROUGHOUT THE TUCSON 
AREA WERE FLOODED. THE SANTA CRUZ RIVER AT CONGRESS STREET HAD A 10 
FOOT RISE IN ABOUT 2 HOURS. THE FLASH FLOODING ALSO BROUGHT A 
FATALITY WITH ONE PERSON DROWNING IN THE RODEO WASH NEAR PARK AVENUE 
AND AJO. 
 
THE AVERAGE MONTHLY TEMPERATURE OF 87.9 DEGREES RANKS AS THE 21ST
WARMEST ON RECORD. TEMPERATURE EXTREMES RANGED FROM 110 DEGREES ON 
THE 4TH TO A LOW OF 69 DEGREES ON THE 16TH...29TH AND 31ST. THE LOW 
TEMPERATURES ON THE 5TH AND 6TH ONLY COOLED TO 87 DEGREES WHICH 
RANKED AS THE 3RD (TIED) WARMEST DAYS ON RECORD.

ALL-TIME TOP 5 WARMEST DAILY LOW TEMPERATURES ON RECORD...
1) 89 DEGREES ON JULY 22 2006
2) 88 DEGREES ON JULY 11 1934
3) 87 DEGREES ON JULY  6 2007
4) 87 DEGREES ON JULY  5 2007
5) 87 DEGREES ON JULY  6 1925

RAINFALL AMOUNTS ACROSS THE METRO AREA WAS ONCE AGAIN HIGHLY VARIABLE
DUE TO THE SCATTERED NATURE OF THE THUNDERSTORMS. OFFICIALLY AT THE 
AIRPORT RECORDED 5.22" WHICH IS 3.15" ABOVE NORMAL. AS A MATTER OF A 
FACT THIS JULY RANKED AS THE 6TH WETTEST JULY ON RECORD. ALL ACROSS 
THE METRO AREA GAGES AVERAGED THE MONTH WITH ANYWHERE FROM JUST OVER 
AN INCH NEAR THE GREEN VALLEY AREA TO OVER 11 INCHES IN THE 
MOUNTAINS. MOST GAGES IN THE TUCSON METRO AREA REPORTED VALUES FOR 
THE MONTH NEAR 4 TO 5 INCHES. 

ALL-TIME TOP 6 WETTEST MONTHLY PRECIPITATION AMOUNTS ON RECORD...
1) 6.24 INCHES IN 1921
2) 6.17 INCHES IN 1981
3) 5.53 INCHES IN 1919
4) 5.45 INCHES IN 1990
5) 5.40 INCHES IN 2006
6) 5.22 INCHES IN 2007

TWO VERY WET DAYS AT THE TUCSON INTERNATIONAL AIRPORT (JULY 31ST AND 
JULY 28TH) HELPED THIS JULY BECOME THE 6TH ALL TIME WETTEST JULY. ON 
JULY 28TH THE TUCSON INTERNATIONAL AIRPORT RECEIVED 1.26 INCHES OF 
RAINFALL WHICH IS THE 3RD WETTEST JULY 28TH ON RECORD. ON JULY 31ST 
THE AIRPORT RECEIVED 1.49 INCHES OF RAINFALL WHICH RANKS AS THE 2ND 
WETTEST JULY 31ST ON RECORD (SECOND TO LAST YEAR!). 

ALL-TIME TOP 3 WETTEST DAILY RAINFALL AMOUNTS FOR JULY 28TH...
1) 1.88 INCHES IN 1921
2) 1.37 INCHES IN 1908
3) 1.26 INCHES IN 2007

ALL-TIME TOP 2 WETTEST DAILY RAINFALL AMOUNT FOR JULY 31ST...
1) 1.90 INCHES IN 2006
2) 1.49 INCHES IN 2007

JULY RAINFALL SINCE 1998 (NORMAL 2.07")
2007 ... 5.22"    2002 ... 2.47"
2006 ... 5.40"    2001 ... 1.09"
2005 ... 0.72"    2000 ... 1.59"
2004 ... 0.86"    1999 ... 4.15"
2003 ... 2.50"    1998 ... 4.06"

...JULY 2007 STATS...          MONTH     NORMAL     DEPARTURE
AVERAGE HIGH TEMPERATURE        99.8      99.6        + 0.2 
AVERAGE LOW  TEMPERATURE        76.0      73.4        + 2.6
AVERAGE TEMPERATURE             87.9      86.5        + 1.4 
RAINFALL                        5.22"     2.07"      + 3.15" 
NUMBER OF 100+ DEGREE HIGHS      19        17         +  2

...2007 STATS THRU JULY...      YEAR     NORMAL     DEPARTURE
AVERAGE HIGH TEMPERATURE        83.9      82.6        + 1.3
AVERAGE LOW  TEMPERATURE        55.6      53.8        + 1.8
AVERAGE TEMPERATURE             69.8      68.2        + 1.6
RAINFALL                        6.85"     5.51"      + 1.34"
NUMBER OF 100+ DEGREE HIGHS      42        36         + 6
MONSOON SEASON RAINFALL         5.22"     2.31"      + 2.91"
WATER YEAR RAINFALL (OCT-JUL)   7.74"     8.42"      - 0.68"

...LOOKING AHEAD INTO AUGUST...
THE CLIMATE PREDICTION CENTER FORECASTS THAT THE MONTH OF AUGUST WILL
HAVE ENHANCED PROBABILITIES FOR ABOVE NORMAL TEMPERATURES AND EQUAL
PROBABILITIES FOR ABOVE NORMAL/NORMAL/BELOW NORMAL RAINFALL.

AVERAGE HIGH TEMPERATURE ......... 97.4 DEGREES
AVERAGE LOW TEMPERATURE........... 72.4 DEGREES
AVERAGE MONTHLY TEMPERATURE ...... 84.9 DEGREES
RECORD HIGH TEMPERATURE ..........  112 DEGREES ON AUGUST 1 1993
RECORD LOW TEMPERATURE ...........   55 DEGREES ON AUGUST 20 1917
WARMEST AUGUST (AVG) ............. 90.3 DEGREES IN 1994 
COLDEST AUGUST (AVG) ............. 80.8 DEGREES IN 1923
NORMAL RAINFALL .................. 2.30 INCHES
WETTEST AUGUST DAY ............... 2.88 INCHES ON AUGUST 1 1935
WETTEST AUGUST ................... 7.93 INCHES IN 1955
DRIEST AUGUST .................... 0.08 INCHES IN 1924

THE NUMBER OF DAYLIGHT HOURS WILL DECREASE FROM 13 HOURS 42 MINUTES
ON THE FIRST TO 12 HOURS 51 MINUTES ON THE 31ST...FOR A LOSS OF
51 MINUTES.

GLUECK/ELSLAGER