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Tropical Storm Murjan (North Indian Ocean)
10.25.12
 
On Oct. 25, 2012 at 0720 UTC (2:20 a.m. EDT) MODIS captured a visible image of Murjan making landfall on the Horn of Africa › View larger image
On Oct. 25, 2012 at 0720 UTC (2:20 a.m. EDT) the MODIS instrument captured a visible image of Tropical Storm Murjan's western half making landfall on the Horn of Africa while the eastern half of the storm was still over the Arabian Sea.
Credit: NASA Goddard MODIS Rapid Response Team
AIRS captured infrared imagery of Tropical Storm Murjan on Oct. 25 at 1017 UTC (6:17 a.m. EDT) › View larger image
The AIRS instrument aboard NASA's Aqua satellite captured infrared imagery of Tropical Storm Murjan on Oct. 25 at 1017 UTC (6:17 a.m. EDT) that showed some strong thunderstorms (purple) over Cape Guardafui, Somalia. Those thunderstorms are reaching high into the troposphere where cloud top temperatures are as cold as -63 Fahrenheit (-52 Celsius).
Credit: NASA JPL, Ed Olsen
NASA Saw Tropical Storm Murjan Making Landfall on the Horn of Africa

NASA's Aqua satellite watched from space as Somalia in the Horn of Africa experienced a landfalling tropical cyclone on Oct. 25.

On Oct. 25, NASA's Aqua satellite saw Tropical Storm Murjan begin to make landfall in eastern Somalia, just south of Cape Guardafui. Cape Guardafui is located in the northeastern Bari province and forms the geographical point of the Horn of Africa.

On Oct. 25, 2012 at 0720 UTC (3:20 a.m. EDT) the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument that flies aboard NASA's Aqua satellite captured a visible image of Tropical Storm Murjan's western half making landfall on the Horn of Africa while the eastern half of the storm was still over the Arabian Sea.

NASA's Aqua satellite also captured an infrared look at Tropical Storm Murjan as the storm continued moving inland. The Atmospheric Infrared Sounder (AIRS) instrument aboard captured infrared imagery that showed about one-half of the tropical storm had moved over Cape Guardafui, Somalia. The western half of the storm over land, contained some thunderstorms that were reaching high into the troposphere where cloud top temperatures were as cold as -63 Fahrenheit (-52 Celsius) and they have the potential to drop heavy rainfall.

As Murjan progressed on its western track, it continued to push further over the Horn of Africa, specifically in northeastern Somalia.

On Oct. 25 at 1500 UTC (11 a.m. EDT), Murjan had maximum sustained winds near 35 knots (40.2 mph/64.8 kph). It was located about 140 nautical miles east-southeast of Cape Guardafui, Somalia, near 9.4 North latitude and 50.7 East longitude. Murjan was moving to the west-southwest at 12 knots (13.8 mph/22.2 kph).

As Murjan continues to move over land, convection (rising air that forms thunderstorms that make up the tropical cyclone) continues to deteriorate quickly. Forecasters at the Joint Typhoon Warning Center expect Murjan to dissipate over land on Oct. 26.

Text credit: Rob Gutro
NASA's Goddard Space Flight Center, Greenbelt, Md.




Oct. 24, 2012

TRMM passed above the first tropical cyclone of 2012 as it was forming in the Arabian Sea on October 2012 at 11:13 a.m. EDT. › View larger image
TRMM passed above the first tropical cyclone of 2012 as it was forming in the Arabian Sea on October 2012 at 11:13 a.m. EDT. TRMM saw that rain at the surface was falling at a rate of up to 41 mm/hour (~1.6 inches) and thunderstorms within were reaching heights of over 16 km (~9.9 miles).
Credit: SSAI/NASA, Hal Pierce
TRMM flyby animation of the first tropical cyclone of 2012 when it was forming in the Arabian Sea on October 2012 at 11:13 a.m. EDT. Click to view TRMM Flyby Animation
This is a flyby animation of data as TRMM passed above the first tropical cyclone of 2012 when it was forming in the Arabian Sea on October 2012 at 11:13 a.m. EDT. TRMM saw that rain at the surface was falling at a rate of up to 41 mm/hour (~1.6 inches) and thunderstorms within were reaching heights of over 16 km (~9.9 miles).
Credit: SSAI/NASA, Hal Pierce
AIRS captured infrared imagery of Tropical Storm 01A on Oct. 24 at 5:35 a.m. EDT › View larger image
The AIRS instrument aboard NASA's Aqua satellite captured infrared imagery of Tropical Storm 01A on Oct. 24 at 5:35 a.m. EDT that showed the strongest thunderstorms (purple) surrounded the center of circulation. Those thunderstorms are reaching high into the troposphere where cloud top temperatures are as cold as -63 Fahrenheit (-52 Celsius). Credit: NASA JPL, Ed Olsen
NASA's TRMM and Aqua Satellites See Birth of First Arabian Sea Cyclone

NASA's TRMM satellite measured rainfall and towering clouds within the Arabian Sea's first tropical cyclone of the season as it passed overhead from space. Meanwhile, the infrared AIRS instrument aboard NASA's Aqua satellite noticed that strong thunderstorms surrounded the center of the storm. Tropical Cyclone 1A is expected to be short-lived as it heads for a landfall in Somalia on Oct. 25.

Since it was launched in 1997 the Tropical Rainfall Measuring Mission (TRMM) satellite has been useful for monitoring tropical cyclones in the tropics. TRMM passed above the first tropical cyclone of 2012 (TC01A) as it was forming in the Arabian Sea on October 2012 at 1513 UTC (11:13 a.m. EDT). Rainfall from TRMM's Microwave Imager (TMI) and Precipitation Radar (PR) were overlaid on an enhanced infrared image from TRMM's Visible and InfraRed Scanner (VIRS) to provide a complete picture of rainfall rates occurring within the storm.

TRMM PR and TMI data showed that rain at the surface was falling at a rate of up to 41 mm/hour (~1.6 inches) in the forming tropical cyclone. Bands of thunderstorms were also wrapping tightly into a well-defined low level center of circulation. TRMM PR data also was also used to create a 3-D image that showed the vertical structure of convective storms in the area. The view showed some towering convective storms were reaching heights of over 16 km (~9.9 miles).

Another satellite passed over TC01A and captured infrared data on the storm, revealing temperature of cloud tops. The colder the cloud top, the higher the thunderstorm is in the atmosphere, and the more powerful the storm. The Atmospheric Infrared Sounder (AIRS) instrument aboard NASA's Aqua satellite captured infrared imagery of Tropical Storm 01A on Oct. 24 at 5:35 a.m. EDT (0935 UTC) that showed the strongest thunderstorms surrounded the center of circulation. Those thunderstorms were reaching high into the troposphere where cloud top temperatures are as cold as -63 Fahrenheit (-52 Celsius).

On Oct. 24 at 1500 UTC (11 a.m. EDT), TC01A had maximum sustained winds near 35 knots (~40 mph). It was located about 300 nautical miles east-southeast of Cape Guardafui, Somalia, near 10.4 North latitude and 55.7 East longitude. TC01A was moving to the west at 16 knots and is expected to move to the west-southwest over the next couple of days before making landfall south of Cape Guardafui, Somalia. Cape Guardafui is located in the northeastern Bari province and forms the geographical point of the Horn of Africa.

Tropical cyclone 01A is predicted by the U.S. Navy Joint Typhoon Warning Center (JTWC) to hit northeastern Somalia on October 25, 2012 with wind speeds of about 35 knots (~40 mph).

Text credit: Rob Gutro
NASA's Goddard Space Flight Center, Greenbelt, Md.