March rain soaks Georgia’s drought

While temperatures were near normal for March in Georgia, rainfall was well above normal, according to data collected by the National Weather Service. Precipitation was below normal only along the state’s northern and southern borders and east-central area.

During the month, Atlanta received 7.13 inches (1.75 inch above normal), Athens 7.05 (2.06 inches above normal), Columbus 12.70 inches (6.95 inches above normal), Macon 7.78 inches (2.88 inches above normal), Savannah 2.84 inches (1.16 inches below normal), Alma 8.20 inches (3.40 inches above normal), Brunswick 3.61 inches (0.32 inches below normal) and Augusta 4.38 inches (0.23 inches below normal).

Georgia volunteer observers with the national Community Collaborative Rain, Hail and Snow Network reported that the largest one-day rain amount was 7.15 inches on March 29 in Miller County in southwest Georgia. Other observers in the region reported 6 inches on that date in Albany and Tifton.

Observers reported snow early in the month as a low pressure area moved through southern Georgia, bringing wintry conditions to the northern part of the state. A band of snow fell along a line from Columbus to Toccoa with the heaviest amounts, over 8 inches, falling northeast of Athens.

Several temperature records were tied during the month. Athens tied a record high of 84 degrees Fahrenheit on March 9. Savannah tied its record of 26 F on March 4 and 5.

Most NWS stations reported mean temperatures a half of a degree above normal for the month. Macon reported the highest above-normal departure at 1 F. Alma reported the lowest below-normal departure at 1.6 F.

Severe weather hit the state several times in March. On March 15, a weak tornado was reported near Putnam in Marion County.

On March 26 and 27, scattered fallen trees, small hail and building damage occurred while a stationary front was located over central Georgia.

On March 28, widespread severe weather occurred in southern and central Georgia. Weak tornadoes were seen in Miller and Dooly counties, along with hail up to 1.25 inches in diameter and scattered wind damage. Heavy rains contributed to local flooding.

Due to the heavy rainfall across most of Georgia, drought levels in many parts of the state were reduced or eliminated. The exceptions to this reduction were the Lake Lanier and Lake Hartwell watersheds and parts of southeastern Georgia, where rainfall in March was below normal.

By Pam Knox
University of Georgia

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March rain relieves Georgia drought

An unusually wet March has brought major drought relief to north Georgia. Only the Lake Lanier and Lake Hartwell basins are now in drought. The remainder of north Georgia is drought-free.

Abnormally dry to moderate drought conditions continue across south Georgia, however.

Though relief has come, long-term rainfall deficits are still a concern. Small and medium reservoirs are full. The major exceptions are Lake Lanier and the Savannah River Valley reservoirs Hartwell, Russell and Clarks Hill.

Rain across the piedmont and mountains have resulted in the soil moisture being near normal for the end of March. However, soils across south Georgia remain abnormally dry.

The counties in north Georgia classified as being in moderate drought are Union, Towns, Rabun, Lumpkin, White, Habersham, Hall and Stephens. With the exception of northwest Georgia, which has normal moisture conditions for late March, the rest of north Geogia is classified as abnormally dry because of long-term rain deficits.

Coastal plain counties in south Georgia are classified as being abnormally dry or in moderate drought. Abnormally dry counties are south and west of Muscogee, Chattahoochee, Marion, Schley, Sumter, Lee, Worth, Colquitt and Brooks. The remaining coastal plain counties are classified as being in moderate drought.

Currently the climate pattern is a weak La Niña pattern tending toward a neutral pattern. A typical weak La Niña spring brings wet weather across the northern piedmont into the mountains, just like north Georgia experienced in March.

However, across the coastal plain and southern piedmont, a weak La Niña spring is usually warm and dry. Outside the series of storms that crossed the coastal plain over the last several days, the expected La Niña pattern has occurred.

Moisture conditions are in good shape across most of the state’s northern half, but the typical moisture recharge period will be ending soon. By the middle of April, plants are in full spring growth and using tremendous amounts of water.

By the middle of April we can expect the soils to begin to dry because of increased plant water use. Additionally, by the middle of April, temperatures are routinely in the 70s to low 80s. This means that evaporation will increase. This late spring and summer drying is normal.

The outlook is for a few more weeks of recharge followed by the normal drying of the soils due to plant water use and evaporation. May is usually a dry month. Little recharge is expected from May through October, but this is typical for Georgia.

The big unknown is what the tropics will bring Georgia this summer and winter. Much of the state’s late summer and fall rain comes from tropical disturbances. Without moisture from the tropics, August through October can be very dry. At this time there are no clear indications of how much rainfall the summer will bring.

By David Stooksbury
University of Georgia

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