The Weather Wire
June 2010 Volume 17 Number 06
Avg High - 68.3
Avg Low - 39.7
Snow - 1.3"
Season Snow - 60.6"
Precipitation - 1.52"
Avg High - 82.1
Avg Low - 53.0
Avg Snow - Trace
Avg Precip - 1.56"
In 2009 Denver received 18.12” of precipitation which was the highest total since 1999. Most of Denver’s precipitation falls in the spring and summer months with the snowier winter months actually providing only a small portion of the annual precipitation. With 15.81” of precipitation on an average year the months of May, June, July and August typically dictate if a year will end up above or below normal in precipitation. Since we are already below average this year it is becoming highly likely that this year will be below normal in precipitation. Below is a list of the top 5 wettest months in Denver history and a table showing the last 10 years of precipitation for Denver to put some of these totals into perspective.
The highest monthly total in Denver history was recorded May of 1876 with 8.57” of total precipitation. That is more precipitation than Denver received for the entire year in 2002. April of 1900 comes in number two on the list with 8.24” of precipitation. If you notice the totals begin to decrease in June indicating that making up for below normal precipitation becomes tougher and tougher as the year progresses. As of June 1st 5.20” of precipitation has been measured at DIA with 6.53” normally resulting in a 1.33” deficit. With the bout of cold and wet weather earlier this month there has been 1.59” of precipitation so far this month which is already above normal for June but we will need some additional rainfall to cut into the deficit. Unfortunately later June into July can be a drier period as we wait for the monsoon season to kick in for the Front Range and if that holds true there may not much additional precipitation this month.
With the widespread precipitation of the last several months few areas of drought remain over Colorado, though some dry areas have developed in western Colorado.
The map below shows forecasted temperature deviances for June 2010. As can be seen, normal temperatures are expected for northeast Colorado with above average temperatures remainder of the state.
The map below shows forecasted precipitation deviances for June 2010. Normal precipitation is expected for most of the state, though far eastern Colorado is expected to above above normal precipitation.
Little in the way of drought remains in Colorado.
May of 2010 started out very cold but towards the end of the month warmer weather took hold and resulted in monthly temperatures being modestly colder than normal. Average highs were 68.3 compared to 70.5 and average lows were 39.7 compared to 43.8. This resulted in a monthly mean temperature of 54 degrees, right around 4 degrees below normal. If it were not for the last warm week of May this month would have gone down as one of the coldest months of May on record. Most of May's precipitation came in the first half of the month with much drier weather towards the end resulting in a monthly precipitation deficit of 0.80. Currently for the year Denver(DIA) is now 1.33" below normal. There was measurable snowfall reported in May of 1.3" which is exactly normal for May and the first May in recent years with measurable snowfall.
June is Denver's severe weather month with the highest frequency of strong and severe thunderstorms capable of producing large hail and tornadoes. Up to the second week of June this has held true as there have been numerous large hail storms all over the state producing damage to agriculture, homes and automobiles. Tornado watches and warnings have been issued up and down the Front Range with the greatest activity over the eastern plains. June of 2009 was the second wettest June on record and that will not happen this year as near normal to slightly below normal precipitation is expected. There are on average 10 thunderstorm days during the month and we are well on our way to that total. Towards the end of June temperatures can easily reach 100 degrees with a record high for the month of 104 degrees.
Sunrise/Sunset (Jan - June Denver area)
Sept 2009 to Apr 2010