U.S. Drought Monitor Update for September 27, 2016

September 27, 2016, U.S. Drought Monitor Map

According to the September 27, 2016, U.S. Drought Monitor, moderate to exceptional drought covers 19.0% of the contiguous United States, a slight increase from last week’s 18.8%. The worst drought categories (extreme to exceptional drought) also increased from 2.9% last week to 3.2%.

The circulation pattern across North America during this U.S. Drought Monitor week was highly amplified, with strong north–south flow over Canada and intense low pressure systems moving in the jet stream across the U.S.–Canadian border. Subtropical high pressure dominated much of the contiguous United States early in the period, keeping the weather warmer and drier than normal, with drought and dryness expanding from the Lower Mississippi Valley to New England. But, the low pressure systems associated with the jet stream to the north brought rain and cooler temperatures as they plunged southward later in the period, reducing drought conditions across parts of the West and Plains. Tropical moisture with a couple other low pressure systems moving northward from lower latitudes brought rain to parts of the Southwest and coastal Mid-Atlantic regions.

The full U.S. Drought Monitor weekly update is available from Drought.gov.

In addition to Drought.gov, you can find further information on the current drought as well as on this week’s Drought Monitor update at the National Drought Mitigation Center. See their recent news releases.

The most recent U.S. Drought Outlook is available from NOAA’s Climate Prediction Center and the U.S. Department of Agriculture’s World Agriculture Outlook Board provides information about the drought’s influence on crops and livestock.

For additional drought information, follow #DroughtMonitor on Facebook and Twitter.