Fire Earth

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System 90Q: Mystery or Mys-take?

Posted by feww on March 11, 2010

“90Q: A curious short-lived ‘tropical’ cyclone in the southern Atlantic”

System 90Q, a low pressure system was located near 29.8ºS and 48.2ºW, about 290 km (180 miles) east of Puerto Alegre, off the coast of Brazil, on Wednesday, March 10 at 14:00 UTC, reportedly with maximum sustained winds about 63km/h (39 mph, or 35 knots), about a click weaker than an official tropical storm), NASA/Goddard Space Flight Center reported, acknowledging that south Atlantic waters are typically too cool to spawn tropical cyclones.

GOES-12 captured a visible image of System 90Q at 14:45 UTC on March 11, which appears “as a small circular area of clouds off the Brazilian coast.” GFS said.


The GOES-12 satellite captured this visible image of System 90Q at 14:45 UTC (9:45 a.m. ET) on March 10, 2010. 90Q is the small circular area of clouds (lower left center). Credit: NASA GOES Project

It becomes curiouser if you examine the SST anomalies in the area where “90Q” was allegedly formed.

Weekly SST Departures for the Last Four Weeks

Click image to enlarge.

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