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TRMM Tropical Rainfall Measuring Mission
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The Tropical Rainfall Measuring Mission (TRMM) is a joint mission between NASA and the Japan Aerospace Exploration Agency (JAXA) designed to monitor and study tropical rainfall.

TRMM satellite out of station-keeping fuel. Click here for details.


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 3-D view of odile remnants rainfall over southwest
Thursday September 18, 2014
Hurricane Odile Remnants Hit Southwest
As predicted the remnants of hurricane Odile are spreading rainfall over the southwestern United states. The remnants of Hurricane Odile were dropping heavy rain in the area from southern Arizona to western Texas when the TRMM satellite flew over on September 18, 2014 at 0723 UTC (00:23 AM PDT). Some rain was found by TRMM PR to be falling at a rate of over 111 mm (4.4 inches) per hour in one downpour east of El Paso, Texas. A 3-D look with TRMM PR found that a few thunderstorm tops were pushing to heights above 13 km (8 miles). Heavy rain in those storms were returning radar reflectivity values of over 55 dBZ to the satellite.

Click here to see earlier TRMM information about Hurricane Odile.

Image and Caption by Hal Pierce (SSAI/NASA GSFC)

Wednesday September 17, 2014
HURRICANE EDOUARD HEADED FOR COOLER WATERS
Edouard, which became the fifth named storm of the season after forming on the night of September 11th (EDT) west of the Cape Verde Islands, continued to strengthen as it made its way through the central Atlantic this past week, reaching hurricane intensity on the 14th before becoming the first major hurricane of the season when it peaked briefly as a category 3 storm on the 16th with sustained winds reported at 100 knots (~115 mph) by the National Hurricane Center (NHC). Fortunately, the storm has not posed a threat to the US East Coast due to the presence of a deep-layer trough along the Eastern Seaborde, which has prevented Edouard from moving further westward and forced it to recurve over the central Atlantic.
   hurricane EDOUARD
This latest overpass of Edouard by the TRMM satellite was taken last night at 03:39 UTC 17 September (11:39 pm EST 16 September) 2014 soon after the storm had begun to recurve to the northeast well east of Bermuda. By this time Edouard had weakened to a category 1 storm with maximum sustained winds reported at 80 knots (~92 mph) by NHC. However, as shown by TRMM, Edouard at this time still has a very robust and mature circulation as evidenced by the presence of a well-defined eye in the rain field and two concentric rain bands surrounding the storm's center. After tropical cyclones reach their peak intensity and continue to age, it's not uncommon for their wind field (i.e., circulation) to expand. And as is the case with Edouard, this can happen as the result of an eyewall replacement cycle wherein an newer outer eye wall forms around the original eyewall creating a double eye-wall structure (i.e., the two concentric rain bands) and another ring of stronger winds around the center but further out. At this time, Edouard's minimum central pressure was 959 mb and is nearly as deep as it was when Edouard was a category 3 storm, but the pressure gradient is now spread over a larger area, which reduces the storm's peak wind intensity but increases the areal extent of stronger winds.
 3-D view of hurricane EDOUARD
A 3D image courtesy of the TRMM PR taken at the same time shows that with Edouard beginning to move over cooler waters there is little in the way of the tall convective towers that can energize the storm's circulation.

Currently Edouard is continuing to move to the northeast away from the US and is expected to begin to weaken and become post tropical before winding up somewhere west of the Azores in the next few days.

Click here to see a Low Resolution 640x360 simulated 3-D (Quicktime) flyby.

Click here to see a Low Resolution 640x360 simulated 3-D (MPEG) flyby.

Click here to see earlier TRMM information about Edouard.

Images by Hal Pierce (SSAI/NASA GSFC)
Captions By Steve Lang (SSAI/NASA GSFC)
  resources TITLE
link to  extreme events archives  link to  3 hourly rainfall image + a week of global rainfall accumulation link to images showing potential flood areas rain accumulation plots and  realtime PR vertical slice images link to Latest 30 Day average rainfall image, anomalies image  and
 ENSO Precipitation Index (ESPI) information. link to averaged monthly rainfall (3B43) Link to the latest quicklook at TRMM orbits  Link to the Educational CLASSROOM MODULES (pdf files)  and VIDEOS

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Curator: Harold.F.Pierce@nasa.gov
NASA Official: Dr Scott A. Braun
Thursday September 18, 2014

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