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| . . . Day by Day . . . | . . . July 21 in Mesonet History* . . . | ||||||||||||
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MESONET TICKER ... MESONET TICKER ... MESONET TICKER ... MESONET TICKER ... July 20, 2017 July 20, 2017 July 20, 2017 July 20, 2017 Drought on the prowl! http://ticker.mesonet.org/archive/20170720/20170718_OK_trd.png Start with dry, add 100s, subtract more water (evaporation), and you have the perfect recipe for drought intensification. Unfortunately, we have all those ingredients in Oklahoma, which should shock no one during July. And it starts before that. A scan of the rainfall maps going back to 60 days show the areas where that drought increase occurred. http://ticker.mesonet.org/archive/20170720/1week-change-DM.png http://ticker.mesonet.org/archive/20170720/30day-totals.png http://ticker.mesonet.org/archive/20170720/30days-pct-normal.png http://ticker.mesonet.org/archive/20170720/60day-totals.png http://ticker.mesonet.org/archive/20170720/60days-pct-normal.png We were not totally without rain going back 90 days, but the difference between the 90-day maps and the 30/60 day maps shows that somewhere close to 90 days out, it stopped raining. http://ticker.mesonet.org/archive/20170720/90day-totals.png http://ticker.mesonet.org/archive/20170720/90day-pct-normal.png The heat has indeed been both impressive and oppressive, a cruel mix often seen during July. http://ticker.mesonet.org/archive/20170720/tmax.ge90.png http://ticker.mesonet.org/archive/20170720/tmax.ge100.png Let's now go forward from 7 days to 3 months and see what the prognostications are. The 7-day rainfall map shows SOME promise, but how often does Mother Nature keep promises when we're talking about rain? http://ticker.mesonet.org/archive/20170720/7day-rain-forecast.gif That moisture is a drop in the bucket compared to what the July sun will leech from the surface, not to mention what plants will suck up and spew into the air (transpiration). And so how about August? Well, warmer than normal is more probable. No clear indication for the precip. http://ticker.mesonet.org/archive/20170720/aug-temp-outlook.gif http://ticker.mesonet.org/archive/20170720/aug-precip-outlook.gif How about we go out to October? Many of you would like that to escape the rest of July and August (and parts of September)...good luck! But, the common theme in all these outlooks is increased odds of above normal temps. But in this case, we also get the odds on our side for some above normal moisture, especially in southern OK. http://ticker.mesonet.org/archive/20170720/aug-oct-temp-outlook.gif http://ticker.mesonet.org/archive/20170720/aug-oct-precip-outlook.gif Some good news? Well, that arrives on Monday. We hope. http://ticker.mesonet.org/archive/20170720/monday-forecast-highs.png Gary McManus State Climatologist Oklahoma Mesonet Oklahoma Climatological Survey (405) 325-2253 gmcmanus@mesonet.org
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