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Southwest Climate Outlook November 2019 | CLIMAS

 SW Climate Outlook

Southwest Climate Outlook November 2019

 

Summary

PUBLISHED:  
Thursday, November 21, 2019

Monthly Precipitation and Temperature: October precipitation in Arizona ranged from below average to record driest, while most of New Mexico was average to above average (Fig. 1a). October temperatures were mostly average to below average in Arizona and New Mexico (Fig. 1b). The daily average temperature anomalies for Oct 1 – Nov 19 (Fig. 2) highlight the fluctuations at select stations around the region including a number of cold spells.

Annual Precipitation and Temperature: Total precipitation for 2019 (Jan-Oct) in Arizona was mostly average to above average, except for the four corners region, while New Mexico was drier with below average conditions across most of the state (Fig. 3a). Mean temperatures in 2019 so far are mostly average to above average in Arizona and above average to much above average in New Mexico (Fig. 3b).

Snowpack & Water Supply: Early season can change quickly, but as of November 18, many Arizona basins are above median snowpack, while New Mexico, Colorado and Utah, are mostly below average (Fig 4). Many of the reservoirs in the region are at or above the values recorded at this time last year, but most are below their long-term average (see Arizona and New Mexico reservoir storage). There have been improvements over the last year, but concerns remain about the recent below average precipitation, along with the accumulated water resource deficits associated with multiple years of drought.

Drought: Drought conditions continue to expand across the Southwest in the Nov. 12 U.S. Drought Monitor (USDM) (Fig. 5). Little precipitation in October, a below average monsoon, and limited incursions of tropical moisture this fall, all contributed to the return of drought designations in much of Arizona and western New Mexico. A large pocket of Severe Drought (D2) is centered on the Arizona/Utah border, but extends well into Arizona, Utah, Colorado, and New Mexico, with Moderate Drought (D1) and Abnormally Dry (D0) making up the characterizations for much of the rest of the Southwest.

Tropical Storm Activity: The eastern North Pacific hurricane season has been near normal with 19 named storms and 4 major hurricanes (category 4 or above) (Fig. 6). Climatology for the same period is approximately 16.5 named storms and 4.3 major hurricanes. Accumulated Cyclonic Energy in 2019 is at 97.5, with 131 the average total by this date.

ENSO Tracker: Oceanic and atmospheric conditions are generally consistent with an ENSO-neutral outlook for 2019 and into 2020 (see ENSO-tracker for details).

Precipitation and Temperature Forecast: The three-month outlook for November through January calls for increased chances of above-normal precipitation in much of New Mexico, but equal chances of above or below normal precipitation across most of the rest of the Southwest. (Fig. 7, top). The three-month temperature outlook calls for increased chances of above-normal temperatures across most of the U.S. Southwest and northern Mexico (Fig. 7, bottom).

Published by the Climate Assessment for the Southwest (CLIMAS), with support from University of Arizona Cooperative Extension, the Arizona State Climate Office, and the New Mexico State Climate office.

Disclaimer. This packet contains official and non-official forecasts, as well as other information. While we make every effort to verify this information, please understand that we do not warrant the accuracy of any of these materials. The user assumes the entire risk related to the use of this data. CLIMAS, UA Cooperative Extension, and the State Climate Office at Arizona State University (ASU) disclaim any and all warranties, whether expressed or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. In no event will CLIMAS, UA Cooperative Extension, and the State Climate Office at ASU or The University of Arizona be liable to you or to any third party for any direct, indirect, incidental, consequential, special or exemplary damages or lost profit resulting from any use or misuse of this data.