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07/26/2024, 6:33 am EDT
Beginning yesterday, forecast models indicated potential evolution of a tropical system east of New Jersey. Water temperatures support tropical development (81-82F). Additionally, a very hot 11-15-day forecast from recent days is suddenly cooler into the Midwest according to GFS and AIFS.
07/25/2024, 8:57 am EDT
While Saharan Dust has suppressed tropical cyclone activity for much of July, the mid-troposphere is quite wet and supports a buoyant tropical cyclone season ahead once the Saharan Dust issue eases likely by the middle third of August.
07/24/2024, 6:10 am EDT
The U.S. population weight CDD forecast explodes to well above normal August 2-8. The GFS is the hottest model, but all ensembles are trending hotter. Contributing to the increasing CDD during early August are hotter forecasts in the PJM-East sector.
07/23/2024, 4:31 pm EDT
Deep layer soil moisture deficits are generally the result of a long-term dry climate pattern. When long duration (7-10 days) hot and dry weather moves across these regions, quick evolving (flash) drought can generate. These conditions are possible in the southeast Great Plains including Eastern Kansas to Central Oklahoma during late JUL/early AUG.
07/22/2024, 3:05 pm EDT
The latest 12Z ECM and GFS 6-10-day temperature anomaly outlook is agreeable to developing extreme heat in the central Great Plains. High temperatures reach 100F-105F from the Dakotas to Oklahoma during the period. Using ECM, the peak day is day-10 which is July 31. The 12Z ECM ENS widens the impressive heatwave back into the West, still peaking in the Central U.S., and stretching to eastern North America.
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Neutral ENSO Continues, Some Cooling NW Coast of South America
The 2024 daily southern oscillation index (SOI) identifies the uncertainty of direction in ENSO phase. Recently, SOI has spiked highly negative albeit for brief periods. The negative phase is an indicator of an El Nino climate. Conversely, a strong positive spike occurred late JUN/early JUL which indicates a strong La Nina climate. The recent spikes are a new SOI character compared to weaker daily SOI observations of MAR/APR/MAY 2024.
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Ocean Temperature Big Contributor to Globe’s Hottest Days on Record
ECMWF reported back-to-back global record hot days (Fig. 1) earlier this week (July 21-22). The climatology used extends back to 1940. On Sunday, July 21, the global temperature reached a record 17.09C and was broken the following day at 17.15C. The previous record was observed in early July of last year.