After a significantly wetter than average January through September, 2010, the spigot literally turned off for the vast majority of Deep South Texas for the final three months.  The lack of rainfall, including many areas with zero measured precipitation since the last days of September, combined with nearly a dozen drying fronts that brought very to extremely low afternoon humidity for a day or two after, and six minor freezes which accelerated drying and curing of grasses and brush, led to a 180 degree turn from above to much above average wetness to pockets of severe drought at year's end.
The severe drought area included portions of counties west of the immediate coast, but was expected to continue and expand with the influence of a moderate to strong La Nina and the correlation to below average late winter and early spring rain and above average temperature.
Raw precipitation data at the end of December showed that most climate recording locations in Deep South Texas, including those with more than 100 years of information, had their driest October to December period on record.  The exceptions were Rio Grande City, where two thirds of an inch fell at the tail of a cold front in mid October, and Raymondville, where a swath of light rain accompanied at least one front in November, pushing them into second place all time.

Drought in JIM HOGG, TEXAS
From 28-DEC-10 00:00:00 to 31-DEC-10 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The National Drought Monitor depicted a swath of D2, or severe, drought across all of Jim Hogg County beginning on December 28th. The Drought condition was largely Agricultural (exceedingly dry grass and brush), as water reserves remained plentiful, though were slowly dropping at the end of the calendar year, following the summer of 2010 excessive rainfall in northern Mexico flowed into the Rio Grande basin and stored at Falcon and Amistad International Reservoirs.
At Hebbronville cooperative station (105 year of record), the prior October to December driest spell of 0.61 inches in 1950 was shattered with a paltry 0.20 inches for the same period in 2010.

Drought in BROOKS, TEXAS
From 28-DEC-10 00:00:00 to 31-DEC-10 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The National Drought Monitor depicted a swath of D2, or severe, drought across western Brooks County beginning on December 28th. The Drought condition was largely Agricultural (exceedingly dry grass and brush), as water reserves remained plentiful, though were slowly dropping at the end of the calendar year, following the summer of 2010 excessive rainfall in northern Mexico flowed into the Rio Grande basin and stored at Falcon and Amistad International Reservoirs.
At the cooperative station near Falfurrias, with 103 years of record, the preliminary three month total rainfall of 0.12 inches fell far short of the prior 60 year old record (1950) dry mark, four times higher with 0.48 inches.

Drought in HIDALGO, TEXAS
From 28-DEC-10 00:00:00 to 31-DEC-10 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The National Drought Monitor depicted a swath of D2, or severe, drought all of Hidalgo County, where the combination of warmest, driest (humidity), and rain free weather was focused from the start of October 2010 and manifesting in a severe drought declaration by December 28th. The Drought condition was largely Agricultural (exceedingly dry grass and brush), as water reserves remained plentiful, though were slowly dropping at the end of the calendar year, following the summer of 2010 excessive rainfall in northern Mexico flowed into the Rio Grande basin and stored at Falcon and Amistad International Reservoirs.
Record dry rainfall (or lack thereof) occurred for the months of October through December at both McAllen reporting stations.  At Miller Airport, the three month total of 0.11 inches fell far short of the nearly 50 year prior record of 1.03 inches, set back in 1961.

Drought in ZAPATA, TEXAS
From 28-DEC-10 00:00:00 to 31-DEC-10 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The National Drought Monitor depicted a swath of D2, or severe, drought across eastern Zapata County beginning on December 28th. The Drought condition was largely Agricultural (exceedingly dry grass and brush), as water reserves remained plentiful, though were slowly dropping at the end of the calendar year, following the summer of 2010 excessive rainfall in northern Mexico flowed into the Rio Grande basin and stored at Falcon and Amistad International Reservoirs.

Drought in STARR, TEXAS
From 28-DEC-10 00:00:00 to 31-DEC-10 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The National Drought Monitor depicted a swath of D2, or severe, drought across northern Starr County beginning on December 28th. The Drought condition was largely Agricultural (exceedingly dry grass and brush), as water reserves remained plentiful, though were slowly dropping at the end of the calendar year, following the summer of 2010 excessive rainfall in northern Mexico flowed into the Rio Grande basin and stored at Falcon and Amistad International Reservoirs.