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Dorian Stalls, Brings Heavy Rain to Bahamas

Hurricane Dorian Brings Heavy Rain to Bahamas

In addition to the powerful winds that have raked the northern Bahamas over the past few days, Hurricane Dorian’s slow motion has brought very heavy rainfall to the islands as well.  Dorian first formed into a tropical depression on the 24th of August about 800 miles east southeast of Barbados in the Lesser Antilles from an area of low pressure; the depression was quickly upgraded to a minimal tropical storm and named Dorian by the National Hurricane Center (NHC) later in the day.

IMERG Measures Rainfall in Hurricane Dorian

IMERG Measures Rainfall in Hurricane Dorian

UPDATE 9/9/19:

On Monday morning, September 9, Hurricane Dorian was a post-tropical storm after a mid-latitude weather front and cold seas had altered its tropical characteristics over the weekend. On Saturday and Sunday, Hurricane Dorian struck eastern Canada, causing wind damage and bringing heavy rainfall.  According to the Associated Press, a peak of 400,000 people were without power in Nova Scotia, Canada, because of Dorian.

IR Anomalies in Early and Late IMERG

Beginning with August 19, 2019 at 13:00 UTC, noise in the form of random horizontal lines over the Eastern Pacific began appearing, with most of the problems appearing each following day in the 12:00, 12:30, and 13:00 half-hours, with at least one instance of 13:30.  This was traced to noise in the GOES-W Tb’s (as the result of the faulty sensor cooling system), which made it past the filtering at CPC, where the Merged Global 4-km IR dataset is assembled.  The Early and Late datasets contain these errors, which will be dealt with in the Final computation.

TRMM era IMERG Completed & End of FTP at PPS

IMERG is now available back to June 2000 of the TRMM era.  Both the 'early'
and the 'late' products have been retrospectively processed.  These products are available in the same location on the jsimpson.pps.eosdis.nasa.gov FTP server as the current GPM IMERG products: /NRTPUB/imerg/early/YYYYMM and /NRTPUB/imerg/late/YYYYMM.

We are in the process of retrospectively processing the GIS-friendly versions and accumulations of these IMERG products. This is likely to be completed by the end of September 2019.

IMERG Measures Flooding Rainfall in India

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IMERG Measures Flooding Rainfall in India

IMERG Measures Flooding Rainfall in India

In early August 2019 a depression formed in the Bay of Bengal that moved over India contributing to heavy rainfall on India's west coast.  NASA's satellite data analysis suggests that from August 5 though 11, two feet of rain fell in some places. This estimate is from the GPM-based realtime multi-satellite algorithm called IMERG, which is run at NASA Goddard.

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