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April Observations 2022


yotaman
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On 4/21/2022 at 5:32 PM, WinstonSalemArlington said:


 Down here it has averaged near normal to date and that’s where the full month is headed. I’ve enjoyed it.

 On another subject but still related to April: the most freak Atlanta winter storm imo wasn’t either the 1993 or 1899 blizzard, it wasn’t the icestorm of 1973, it wasn’t snow jam 1982 or snow jam 2014, it wasn’t the near 8” snow of 3/24/1983, it wasn’t the heaviest on record in downtown of 10” of 1940, and it wasn’t either of the 4” sleetstorms of 1979 and 1988. What do I think it was? This one:

 
 https://site.extension.uga.edu/climate/2017/04/april-25-1910-snowfall-in-northern-georgia/
 

  Not only was the snowstorm happening that late in April so hard to believe (it was 3 weeks later than the second latest measurable of any amount), the high temperature of only 39 was only the third April day with a high only in the 30s since the late 1800s and nearly 3 weeks later than the second latest! 

 Here’s a map showing the snow: note how far south in GA and AL the measurable got. I’ll add that trace amounts were seen as far south as Americus in SW GA, which is at the latitude of Savannah! There’s no way to know obviously, but it wouldn’t surprise me if this was a once every 500+ year type of occurrence in GA based on how freak this was.

3ABD6121-590B-47E3-B47D-2820C5F09B65.png.a9c27aefcfb1e38364b0f5d097f41ba5.png

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 After a long warmer to much warmer than normal period going back through last December (typical of the last decade+), the Arctic has finally cooled to colder than normal over the last week and is now 5C below normal during this period of sharp warming of normals. That is the coldest anomaly for any portion of the year going back at least to 2015. It is also the coldest for April 24th since way back in 1964! No other year on record back to 1958 other than 1964 had it as cold as 251 K (-22 C) this late in the season. After another day or so of continued cold, models have it warming solidly soon after. So, this degree of chill in the Arctic won’t last much longer per models and it will more than likely end up just being a short blip and thus insignificant. Regardless, it will be interesting to follow. Here’s the latest:

05CC01AF-3219-401A-A290-36A11716AB28.jpeg.94812312958f494ac8d6da3f22bf284c.jpeg

 

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April 2022 at KSAV:

Mean 66.0 vs 66.6 normal and 64.7 last April

Average high 78.7 and average low 53.4

Warmest 88 (vs normal of 89, 88+ since 2006, highest 95 set in 1986, and lowest 78 set in 1901)

Coldest 37 (vs normal coldest of 39, highest 52 set in 1941, and lowest 28 set in 2007)

Rainfall 0.87" (vs normal of 3.39", 17th driest back to 1871 (meaning nearly 90% have been wetter), driest since 2012

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More on the dryness at KSAV: SAV members may especially find this of interest @gtg947h @Awesomesauce81

Dec 2021 -Apr 2022 rainfall: 8.04" vs normal of  16.17" (So, only 50% of normal). So, we need rain badly! I'm starting to irrigate.

- 8th driest on record (back to 1871)

- Driest since 1988-9

- The 7 drier ones were in 1988-9, 1984-5, 1937-8, 1926-7, 1910-1, 1897-8, and 1889-90

- Regarding ENSO, 4 of those 7 drier periods were during La Nina (like 2021-2) and other 3 were during cold neutral.

- Longterm ENSO climo for this area/SE coast favors dryness during La Nina and wetness during El Nino (wettest ones usually stronger).

- The driest El Nino Dec-Apr was 9.62" (1930-1) followed by 9.72" (2006-7). Only 2 El Nino below 10" and none below 9.62".

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