Phoenix: 103 day without rain and counting

- Posted in Weather Records by

Do you remember what the weather was like back on August 20, 2020? If you don't, that is the last time measurable rain was recorded at Phoenix Sky Harbor. And believe it or not, this 103 day long dry streak is not the record, which stands at 160 days (no measurable rain from December 30, 1971 to June 6, 1972).

With that said, we are breaking a different record. So far this year, measurable rain has only fallen on 13 days at Phoenix Sky Harbor. The current record for the least in a year stands at 18 days in 2002. With only one month left and no rain in sight, it is looking like we will break that record this year.

This is also not the first time so far this year with a 103 day long dry streak. No measurable rain fell from April 12th through July 23rd, marking another 103-day long streak. This is only the 3rd year since records began in 1896 that there have been two dry streaks of 100 or more days.

  • 1938: 107 days and 105 days, totaling 212 days
  • 2006: 143 days and 105 days, totaling 248 days
  • 2020: 103 days and 103 days, totaling 206 days and counting

Looking at long term forecasts, signs are pointing toward dry conditions continuing through the winter. But fingers are crossed for at least some measurable rain to end this latest dry streak.

Exceptional Drought covers nearly 72% of Arizona

- Posted in Drought by

The drought numbers just keep getting worse in Arizona. With a very dry monsoon and a continued dry fall, currently, 71.8% of the state is in Exceptional Drought, which is the highest drought classification.

This is also the highest percentage of the state in Exceptional Drought for the period of record: 2000-2020.

Unfortunately, with La Nina in place, all signs are pointing toward below-average rainfall this winter. Remember, these dry conditions will continue to result in high fire danger across the state, so use extreme caution while outdoors.

Worst Drought in Arizona Since 2002

- Posted in Drought by

The latest drought numbers were released today (Nov 19th), and they are not good.

Currently, 32.8% of Arizona is in Exceptional Drought, which is the highest level of drought. Another 51.9% is classified as Extreme Drought. These are the worst drought numbers the state has seen since July 2002.

Currently, Phoenix Sky Harbor is sitting 2.27" below average for rainfall this year, but other locations are doing far worse. Tucson is 6.49" below average for the year (~38% of average), and Flagstaff is down 10.07"!

With La Nina in place, the latest long-term forecasts for this winter call for dry and warm conditions overall.

Arizona: Exceptional Drought Returns

- Posted in Drought by

With a nearly nonexistent monsoon this year, it shouldn't come as too surprising that drought numbers are back on the rise across Arizona. Currently, 3% of the state is now in exceptional drought, which is the highest drought classification. Extreme drought covers another 67% of the state.

This is the first time since January 2019 that exceptional drought has been in Arizona. And further analysis shows that using the Drought Severity and Coverage Index, these are the worst drought conditions Arizona has seen since July 2018.

So any relief in sight?

Unfortunately, there is no rain forecast in the near term. Looking longer-term, with La Nina conditions expected through the winter, the Climate Prediction Center has a 40-50% chance of having below-average rainfall this winter.

With very dry conditions around the state, be sure to use extreme caution with any open flames or activities that may create sparks as fire danger remains elevated.

December 2019 Drought Update

- Posted in Drought by

There is some excellent news when it comes to drought across Arizona: it's improving!

The latest drought monitor update shows 50.54 percent of the state is not in any drought classification. Another 22.84 percent of the state is "Abnormally Dry," which indicates an area that is experiencing dry conditions but is not yet in drought.

With that said, moderate to severe drought still exists in the north/northeast portion of the state, and the National Drought Mitigation Center explains, " In the Four Corners states, the map depiction strives to balance the effect of the recent precipitation with the failure of the monsoon."

This "balance" can be seen looking at the departure from average rainfall graph for Phoenix Sky Harbor (below). From June 15th through September 30th (the monsoon), Phoenix only recorded 0.66 inches of rain, making it the 5th driest on record. At the start of the season (June 15th), the Valley was only 0.19 inches below average for the year, and by the end (September 30th), the gauge was 2.24 inches below average.

The dry weather continued through October before a major storm system moved through the state November 19th - 21st, with a storm total in Phoenix of 0.84 inches. Another strong storm moved through the region on November 28th and 29th, with another 0.71 inches falling at the airport.

While this Fall rain has helped and drought conditions are improving, Phoenix is still sitting 2.26 inches below average for the year when it comes to rain.

Fingers crossed for a wet end to 2019 (there's a chance)!

Arizona Drought Update: November 2019

- Posted in Drought by

It was a dry monsoon, and so far, a dry fall. Phoenix, as of November 15th, is sitting at 3.68" of rain for the year, which is 3.11" below average. Most locations across the high country of Arizona are also running below average for the year. This means one thing: expanding drought.

Severe drought now covers 45.56% of the state, which is a 6% increase from just last week.

Even though drought is increasing, it is still better compared to what we were seeing last year at this same time. In November 2018, 4.33% of the state was in Exceptional Drought with 8.27% in Extreme Drought.

It is looking like a pattern shift will be taking shape next week, which could bring beneficial rain to the state. One storm will certainly not end the drought; however, anything will help!