Officially, January 2010 was the eighth-wettest January in Tucson history, according to the National Weather Service office in Tucson.
Rainfall for the month was 2.1 inches at Tucson International Airport. The wettest January in history was in 1993, when 4.81 inches of rain fell.
Measuring points in the Northwest experienced rainfall exceeding the Tucson sum, according to the Pima County Flood Control District. A measuring station in Catalina State Park recorded 4.21 inches during the month. Big Wash at Rancho Vistoso Boulevard picked up 3.62 inches. Oracle came in at 3.66 inches. Mount Lemmon received 5.98 inches of moisture.
On Monday, the National Weather Service predicted "enhanced probabilities for above normal precipitation" during February, beginning with a storm system expected Tuesday night.
The forecast predicts a 55 to 65 percent change of above-average precipitation across Southern Arizona, and a less than 10 percent change of below-average moisture. The outlook through April also forecasts a 50 to 55 percent change of above-average moisture, due to an El Niño in the Pacific.
January moisture totals:
Oracle — 3.66
Cañada del Oro Wash northeast of SaddleBrooke — 3.94
SaddleBrooke — 3.35
CDO at Golder Ranch Road — 2.99
Big Wash at Rancho Vistoso — 3.62
CDO at Big Wash — 3.31
Moore Road at La Cholla — 3.19
CDO at Ina Road — 2.44
Santa Cruz River at Ina — 2.56
Picture Rocks — 2.24
Source: Pima County Flood Control District