The Monsoon Rainfall Page

The 2010 Monsoon Season Officially began as of 7/09/10
Today Jul 11th, marked the third day in row with a average dewpoint
reading at 55.0°F or higher, this marks the begin of the season based on older
criteria of dewpoint*, by the newer set date system the season began on June 15th!!

                      Pepper Ridge Dewpoint averages over the last 6 days.

                          July  6th ---- 45.8°F    July  9th*---- 58.8°F
                          July  7th ---- 45.8°F    July 10th ---- 61.4°F
                          July  8th ---- 52.3°F    July 11th ---- 50.8°F

                 The Monsoon also officially started at Phoenix Sky Harbor,as of July 9th

                 The season began on June 15th based on the calendar date criteria!!!

THE 2010 MONSOON SEASON IS ALMOST HERE AT PEPPERRIDGE!

The 2010 Monsoon Season looks as if it could began on 7/11
Today Jul 10th, looks likely to mark the second day in a row with a average
dewpoint reading at 55.0°F or higher, this is based on the older
criteria by the newer set date system the season began on June 15th!!

                      Pepper Ridge Dewpoint averages over the last 6 days.

                          July  4th ---- 52.1°F    July  7th ---- 45.8°F
                          July  5th ---- 46.0°F    July  8th ---- 52.3°F
                          July  6th ---- 45.8°F    July  9th ---- 58.8°F

                 The Monsoon has officially started at Phoenix Sky Harbor,on June 15th

07/22 - First Measurable rain of Monsoon 2010 at Pepperridge fell on July 22nd
The mere 0.04 inches ended a 120 day rainless streak at Pepperridge. (Mar 24th - July 21st)
This is the second longest rainless streak at this station.

07/29 - First Major storm of Monsoon effects parts of the valley primary in Tempe,
Chandler , South and Central Phoenix, Glendale, Peoria and Sun City.
Winds even damaged a section of the roof at University of Phoenix Stadium.
Here at Pepperridge we received only a glancing blow from this storm.
While up to 1/2 inch to 1 inch of rain fell as close as about 5 miles West and NW of this station
Here results were very disappointing with 0.03 inches bringing the month only to a dismal 0.07 inches
With only 2 days left in the month this could be the driest July on record beating last years 0.13 inches

07/31 - Overnight Thundershowers bring a wet end to July with the first significant rainfall at Pepperridge
0.49 inches fell between 2:30am and 5:00am ending the month with 0.56 inches the 6th driest July on record
However afternoon showers left parts of south central Phoenix with up to 1 1/2 inches of rain this included
a daily record at Sky Harbor with 1.33 inches, so for parts of valley July ended fairly wet with up to 2 1/4 inches.
But at Pepperridge it has been a fairly dry month and Monsoon 2010 has been a NONSOON so far.

8/21-8/22 - The 2nd Major storm of this Monsoon season again effected mainly the East Valley with
rainfall totals of up to 1.50 inches this storm ended up producing decent 0.41 inches here at Pepperridge
This storm moves Monsoon 2010 into 2nd place for the Driest Monsoon on record!!

8/24 - Another promising storm goes bust here at Pepperridge with brief heavy rain but only 0.08 inches total!
Futher north of our location they received up to 1/2 inch. However this storm produced some strong winds
These were the strongest so far of this Monsoon with substained winds of 29 mph & peak gust 40 mph at 4:32 pm!!

8/28 - A unusually strong front for late summer influences the season as westerlies begin to drive the moisture out.
However a brief Heavy thunderstorm effected the area with 0.19 inches of rain bringing the month to 0.86 inches.

8/31 - As August closes Monsoon 2010 remains one of the driest in 3rd place overall for driest Monsoon.
The August rainfall was 0.86 inches which was (0.42 inches) below the normal 1.28 inches.
The month closed out dry as westeries again disrupted the monsoon because of the lingering effects of El nino.

The 2009 Monsoon Season has officially began at Pepper Ridge North Valley on 6/29
Today Jul 1st, marks the third day in a row with a average
dewpoint reading at 55.0°F or higher, this is based on the older
criteria by the newer set date system the season began on June 15th!!

                      Pepper Ridge Dewpoint averages over the last 6 days.

                          June 26th ---- 55.1°F    June 29th*---- 58.4°F
                          June 27th ---- 54.5°F    June 30th ---- 61.3°F
                          June 28th ---- 54.9°F    July 1st  ---- 60.9°F

                 The Monsoon has officially started at Phoenix Sky Harbor,on June 15th

8/13 - Finally a storm as "NONsoon 2009" continues. A decent early morning storm
produces 0.32 inches of badly need rain as the dismal 2009 season continues
Unfortunately more unusually dry weather is forecast thru next week

8/31 - NONsoon 2009" breathes a little new life at month's end
A evening thunderstorm produces 0.20 inches of badly need rain as the dismal 2009 season continues

9/23 - With only 7 days left in the season it looks like this will be the
Driest Monsoon on record with only 0.69 inches, it has been a disappointing Summer!

10/01 - It's Official Monsoon 2009 is officially over and it was the
Driest Monsoon on record with only 0.69 inches the prior driest Monsoon was 2002 with 1.28 inches

The 2008 Monsoon Has Began at Pepper Ridge North Valley
Based on the dewpoint criteria which has to have average 55°F or above for 3 days in a row
This criteria was met on July 5th which means the Monsoon began on July 3rd
HOWEVER based on the new Method of preset dates the Monsoon began on June 15th!!

Yesterday July 5th, marked the third day in a row with a Dewpoint average at 55.0°F or above,
which means based on criteria for dewpoint averages*
the Monsoon began three days ago on July 3rd. Last years season began on July 8th.

                      Pepper Ridge Dewpoint averages over the last 6 days.

                          June 30th ---- 53.4°F    July 3rd* ---- 58.0°F
                          July 1st  ---- 53.5°F    July 4th  ---- 60.9°F
                          July 2nd  ---- 53.3°F    July 5th  ---- 59.9°F

                 The Monsoon has officially started at Phoenix Sky Harbor,on June 15th

1st Decent Storm of Monsoon 2008 produces 1.07 inches
On July 11th and 12thh with a peak Wind Gust of 25 Mph at 8pm on July 11th.

2nd Decent Storm of Monsoon 2008 produces 0.85 inches
On Aug 7th with a peak Wind Gust of 37 Mph at 9pm.

3rd Decent Storm of Monsoon 2008 produces 0.99 inches
On Aug 25th with a peak Wind Gust of 26 Mph at 7:55pm.