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Southwest Climate Outlook March 2020 | CLIMAS

 SW Climate Outlook

Southwest Climate Outlook March 2020

Summary

PUBLISHED:  
Thursday, March 19, 2020

Monthly Precipitation and Temperature: February precipitation ranged from below average to much below average in Arizona and New Mexico (Fig. 1a), while February temperatures were average to above-average across nearly all of Arizona and New Mexico (Fig. 1b). The daily average temperature anomalies for Feb 1 – Mar 18 (Fig. 2) highlight the fluctuations at select stations around the region.

Seasonal Precipitation and Temperature: Winter precipitation (Dec 2019 - Feb 2020) ranged between below average and above average across Arizona and New Mexico, with large areas of below-average conditions in other parts of the Southwest (Fig. 3a). Winter temperatures were average to much above average across most of the region (Fig. 3b).

Water Year Precipitation: Water year precipitation to date (since Oct 1, 2019) has been normal to much above normal for much of Arizona and New Mexico (Fig. 4). The Four Corners region remains a notable exception, with mostly below-normal precipitation since Oct 1.

Snowpack & Water Supply: As of Mar 15, snow water equivalent (SWE) was mostly below median in Arizona, New Mexico, and southern Colorado, while southern Utah was more consistently above median (Fig 5). 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).

Drought: The Mar 10 U.S. Drought Monitor (USDM) maintains drought characterizations similar to last month in the Four Corners region while expanding drought characterizations in central Nevada and California, and scaling back drought characterizations in southeastern New Mexico (Fig. 6). “Moderate Drought” (D1) and “Severe Drought” (D2) characterizations are centered on the Four Corners region, reflecting localized acute and accumulated precipitation deficits.

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

Precipitation and Temperature Forecast: The three-month outlook for April through June calls for slightly increased chances of below-average precipitation in small pockets of California, southern Nevada, and northwest Arizona, which much of the rest of the southwestern U.S. and northern Mexico calling for equal chances of above or below average precipitation (Fig. 7, top). The three-month temperature outlook calls for increased chances of above-normal temperatures across most of the southwestern U.S. 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.