Only areas that saw some of the most abnormally heavy rain observed subtly below average temperatures, a clear indication of how strong the climate change signal has become within the temperature records (Figure 5). Data source: NCEI NClimGrid.ĭespite the wetter than usual monsoon, temperatures were above normal for much of the region (Figure 4). (Right) Standardized rainfall anomalies for June 2021 through September 2021 based on a normal period of 1991-2020. Black contours indicate areas of record rainfall (records since 1895). (Left) Total rainfall for June 2021 through September 2021. Notably, much of northern New Mexico observed drier than usual conditions.įig 3. Correspondingly, these record-setting areas were within broader regions of above average rainfall, though above average rainfall was not observed across the entire Southwest (Figure 3-Right). Areas that saw record rainfall include (outlined in black, Figure 3-Left): northeast of Phoenix, AZ, east of Payson, AZ, and west of Show Low, AZ northwest and south of Tucson, AZ near Ajo, AZ near the Guadalupe mountains (NM/TX). Data source: NCEI NClimGrid.Īs is usually the case, the absolute heaviest rainfall amounts fell near and over the mountains across the region. Average monsoon rainfall across the Southwest by year. Average rainfall during the core monsoon months of Jun-Sep across the region was 7.93", which was the 20th wettest on record (since 1895), wettest since 2014, and well above the 1991-2020 average of 6.39” (Figure 2).įig 2. In a stark turn of events, following the driest monsoon on record ( 2020 ), the 2021 monsoon was one of the wetter on record across the Southwest US (here defined as Arizona, New Mexico, and far west Texas Figure 1).
Areal extent of the “Southwest” commonly referenced in this analysis. Note: click on images for full-resolution versions.įig 1.
#PHOENIX SKY HARBOR RAINFALL TOTALS FULL#
Please review our full terms contained on our Terms of Service page.Review of the 2021 Monsoon Across the Southwest U.S.Ĭompiled by NOAA/NWS Phoenix, AZ. We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands. We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. We assume no responsibility for any decisions made on the basis of the content presented on this site. Weather data is prone to errors, outages, and other defects. The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. See all nearby weather stations Disclaimer The details of the data sources used for this report can be found on the Phoenix Sky Harbor International Airport page.
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