Recent Seeding missions

 

 

This year daily reports will be posted on this page in order to allow who ever wishes to see what happened on particular seeding day.  These reports will include information about the weather pattern that day, seeding operations and in particular, information about where seeding occurred and how much seeding material was used.  The files will be in PDF format and will be located at the end of each monthly summary.  If there are any questions about these reports, please feel free to email Stephanie Beall, the meteorologist in charge of the project.    If you wish to view reports other than the current year, please contact the project meteorologist. 

Rainfall totals in the monthly summaries are taken from the CoCoRaHS website and can be viewed at the following web address:  http://www.cocorahs.org  Precipitation images on for the monthly update are taken from the National Weather Service webpage.

 

 

March 2011

After a very dry winter across south Texas, March continue to be the same as high pressure seemed to shunt most of the weather system well to the north.  This led to a very dry month across the area for March.  Some locations over the target area did not receive any rainfall for the month of March, with locations that did receive precipitation only got small amounts.  The highest rainfall totals of an inch occurred in very isolated spots in southern Uvalde/northern Zavala counties.  The very dry month across the area had a very strong impact on seeding efforts as no seeding flights occurred during  the month.  One reconnaissance flight did take place near the end of the month.

 

Town (County) March 2011 Precipitation (inches) 2011 Year to Date Precipitation (inches)
Carrizo Springs (Dimmit) 0.15 2.15
Cotulla (LaSalle) 0.08 1.15
Crystal City (Zavala) 0.12 1.16
Laredo (Webb) Trace 2.10
Uvalde (Uvalde) 0.17 1.16

Below is the flight information spreadsheet and the monthly precipitation graphic for the months of March.

March 2011 flight activity spreadsheet

March 2011 precipitation map -- Northern target area

March 2011 precipitation map -- Southern target area

 

April 2011

April continued to bring a very dismal  pattern weather wise to south Texas, as most locations received less precipitation than they did in March.  This amounted to a large portion of the target area receiving no rainfall during the month of April.  This can been seen in the rainfall table below, as the towns scattered throughout the target area all reported no rainfall for the month.  The only locations that did receive rainfall were along the western boundary of the target area and northern Webb County.  LaSalle county received no rainfall for the month April.  Another month of dry conditions yielded another month of almost no flight activity and still no seeding flights for the 2011 season. However,  two reconnaissance missions took place this month.

 

Town (County) April 2011 Precipitation (inches) 2011 Year to Date Precipitation (inches)
Carrizo Springs (Dimmit) 0 2.15
Cotulla (LaSalle) 0 1.15
Crystal City (Zavala) 0 1.16
Laredo (Webb) 0 2.10
Uvalde (Uvalde) 0 1.16

Below is the flight information spreadsheet and the monthly precipitation graphic for the months of April.

April 2011 flight activity spreadsheet

April 2011 precipitation map -- Northern target area

April 2011 precipitation map -- Southern target area

 

May 2011

May showed some improvement in regards of precipitation over south Texas, but was still well below normal.  Most of the month was characterized by above average temperatures and dry conditions but a few rain events helped to bring some much needed rainfall to south Texas.  The rain even that most gave most locations their monthly precipitation occurred on May 12th when a squall line moves across south Texas.  May also marked the first seeding flight of the 2011 seeding season.  This was the latest seeding flight ever in the history of the Southwest Texas Rain Enhancement Association with the second latest occurring on May 3rd in both 2001 and 2002.  In addition, three reconnaissance flight took place in May.  Most locations received small precipitation amounts but only a couple inches below normal.  Locations near Crystal City and in northwestern Webb County were actually above normal for the month.

 

Town (County) May 2011 Precipitation (inches) 2011 Year to Date Precipitation (inches)
Carrizo Springs (Dimmit) 1.91 4.06
Cotulla (LaSalle) 0.62 1.77
Crystal City (Zavala) 1.75 2.91
Laredo (Webb) 1.52 3.62
Uvalde (Uvalde) 2.39 3.55

Below is the flight information spreadsheet and the monthly precipitation graphic for the month of May.

May 2011 flight activity spreadsheet

May 2011 precipitation map -- Northern target area

May 2011 precipitation map -- Southern target area

May Reports

May 6, 2011 report

 

June 2011

June brought a little more activity to the area but still most locations were relatively dry.  June is usually a transitional month over south Texas.  During the spring, weather systems move into south Texas from the north or west, primary driven by cold fronts or disturbances.  During the summer months, systems from the north typically retreat northward with the jet stream.  Weather over south Texas is then influence mainly by the Tropics, primary driven by tropical disturbances or tropical cyclones.  June typically is a busy month for the area, but with a strong area of high pressure over the area, most rain chances were absent from the daily forecast.  Near the end of the month, moisture from Tropical Storm Arlene which made landfall on the eastern coast of Mexico, moved into south Texas and opened the door for a number of weather chances.  June brought a total of two seeding flights and three reconnaissance flights to the target area.

 

Town (County) June 2011 Precipitation (inches) 2011 Year to Date Precipitation (inches)
Carrizo Springs (Dimmit) 0.21 4.21
Cotulla (LaSalle) 0.10 1.87
Crystal City (Zavala) 0.83 3.74
Laredo (Webb) 0.31 3.93
Uvalde (Uvalde) 1.30 4.85

Below is the flight information spreadsheet and the monthly precipitation graphic for the month of June.

June 2011 flight activity spreadsheet

June 2011 precipitation map -- Northern target area

June 2011 precipitation map -- Southern target area

June Reports

June 4, 2011 report

June 30, 2011 report

 

July 2011

July finally brought rains and flight activity to the target area.  Even thought rainfall totals were still below normal, it was the most active month during the 2011 season.  A number of weather systems affected the target area, both from the north and south.   Most systems seemed to be tropical in nature, effecting mostly the eastern/southeastern parts of the target area, however a few events started out to the north of the area, most notably, one that start in the Texas Hill County and made it all the way into Webb County, giving most of the target area a much needed widespread rain event.  Tropical Storm Don made landfall along the mid Texas coast near the end of the month, but never really made an impact on the area  as near landfall it entrained very dry air that was located over the area, vaporizing the tropical cyclone.  July brought a total thirteen seeding flights on eight seeding days.  Additionally, three reconnaissance flights occurred during the month of July.  The complete flight activity from the month can be view below.

Town (County) July 2011 Precipitation (inches) 2011 Year to Date Precipitation (inches)
Carrizo Springs (Dimmit) 1.09 5.36
Cotulla (LaSalle) 0.90 2.77
Crystal City (Zavala) 1.35 5.09
Laredo (Webb) 0.35 4.28
Uvalde (Uvalde) 0.90 2.77

Below is the flight information spreadsheet and the monthly precipitation graphic for the month of July.

July 2011 flight activity spreadsheet

July 2011 precipitation map -- Northern target area

July 2011 precipitation map -- Southern target area

July Reports

July 1, 2011 report

June 2, 2011 report

July 10, 2011 report

June 19, 2011 report

July 20, 2011 report

June 22, 2011 report

July 29, 2011 report

June 30, 2011 report