NASA finds tropical storm Sarai strengthening

On Dec. 27 at 0135 UTC (Dec. 26 at 8:35 p.m. EST) NASA’s Aqua satellite analyzed the using the AIRS instrument. AIRS showed the strongest storms were located over the Lakshadweep Islands where the coldest cloud top temperatures as cold as or colder than 210 Kelvin (purple) minus 81 degrees Fahrenheit (minus 63.1 degrees Celsius) around the center (NASA)

NASA analyzed the cloud top temperatures in Tropical Storm Sarai using infrared light to determine the strength of the storm.  Already there are regional warnings in effect for Fiji and Tonga.

In Fiji, there is a storm warning is in force for Vatulele and Kadavu. A gale warning is in force for Vanua Levu, Taveuni, Yasawa and the Mamanuca Group, Kadavu, Lomaiviti Group, Viti Levu and nearby smaller islands. Tonga is on tropical cyclone alert

One of the ways NASA researches tropical cyclones is using infrared data that provides temperature information. Cloud top temperatures identify where the strongest storms are located. The stronger the storms, the higher they extend into the troposphere, and they have the colder cloud temperatures.

On Dec. 27 at 0135 UTC (Dec. 26 at 8:35 p.m. EST) NASA’s Aqua satellite analyzed the storm using the Atmospheric Infrared Sounder or AIRS instrument. The AIRS imagery showed the strongest storms circling the center of circulation, just west of Fiji and in a thick band of thunderstorms northeast of Fiji.

In those areas, AIRS found coldest cloud top temperatures as cold as or colder 210 Kelvin minus 81 degrees Fahrenheit (minus 63.1 degrees Celsius). NASA research has shown that cloud top temperatures that cold indicate strong storms that have the capability to create heavy rain.

Tropical cyclones do not always have uniform strength, and some sides have stronger sides than others, so knowing where the strongest sides of the storms are located helps forecasters. NASA then provides data to tropical cyclone meteorologists so they can incorporate it in their forecasts.

At 10 a.m. EST on Dec.27 the Joint Typhoon Warning Center or JTWC noted that the center of Tropical cyclone Sarai was located near 18.7 degrees south latitude and 176.1 degrees east longitude. That is about 136 nautical miles west-southwest of Suva, Fiji. Maximum sustained winds were near 55 knots (63 mph/102 kph) and the storm was strengthening. It was moving to the south and expected to turn east.

Sarai is forecast to move toward the east. The storm is expected to strengthen briefly to 65 knots on closest approach to the main Fijian islands, but weaken as it nears Tonga.

Typhoons and hurricanes are the most powerful weather event on Earth. NASA’s expertise in space and scientific exploration contributes to essential services provided to the American people by other federal agencies, such as hurricane weather forecasting.

The AIRS instrument is one of six instruments flying on board NASA’s Aqua satellite, launched on May 4, 2002.

Severe Weather Warning issued for next 5 Days 

India Meteorological Department has issued severe weather warning for the five days beginning April 7, 2018 to April 11, 2018.

The northeastern belt over the Gangetic plain and Bihar, Assam  & Meghalaya  and Nagaland, Manipur, Mizoram & Tripura are likely to witness thunderstorm accompanied with squall, said the Met agency in its latest bulletin. Southern states are likely to witness severe rains today and tomorrow. Hyderabad, Bangalore and Chennai may have to be prepared for a rainy weekend, going by the weather report.

Here is the details alert:

07 April (Day 1):

♦  Heavy rain very likely at isolated places over Meghalaya.

♦ Thunderstorm accompanied with squall and hail very likely at isolated places over Gangetic West Bengal, Jharkhand and Odisha.

♦ Thunderstorm accompanied with squall very likely at isolated places over Bihar, Assam  & Meghalaya  and Nagaland, Manipur, Mizoram & Tripura.

♦ Thunderstorm accompanied with gusty winds & lightning very likely at isolated places over Madhya Maharashtra and Marathwada.

♦ Thunderstorm accompanied with gusty winds very likely at isolated places over East Uttar Pradesh, interior Tamilnadu, Interior Karnataka, north Coastal Andhra Pradesh, Telangana, Vidarbha, Chhattisgarh and Sub­Himalayan West Bengal & Sikkim

08 April (Day 2):

♦ Heavy rain very likely at isolated places over Sub­Himalayan West Bengal & Sikkim.

♦  Thunderstorm accompanied with squall and hail very likely at isolated places over  Uttrakhand and Odisha.

♦ Thunderstorm accompanied with squall very likely at isolated places over Sub­Himalayan West Bengal  & Sikkim, Bihar,  north Uttar Pradesh and Punjab.

♦ Thunderstorm accompanied with gusty winds & lightning very likely at isolated places over Madhya Maharashtra, Marathwada  and south Konkan & Goa.

♦ Thunderstorm accompanied with gusty winds very likely at isolated places over interior Tamilnadu, Kerala, Interior  &  Coastal Karnataka,Vidarbha, Chhattisgarh, Jharkhand, Gangetic West Bengal and East Madhya  Pradesh.

09 April (Day 3)

♦ Thunderstorm accompanied with squall and hail likely at isolated places over Jammu & Kashmir, Himachal Pradesh and Uttarakhand.

♦  Thunderstorm accompanied with squall likely at isolated places over Punjab.

♦  Thunderstorm accompanied with gusty winds likely at isolated places over Kerala and Haryana, Chandigarh & Delhi.

10 April (Day 4):

♦ Thunderstorm accompanied with squall and hail likely at isolated places over Jammu & Kashmir, Himachal Pradesh and Uttarakhand.

♦  Thunderstorm accompanied with squall likely at isolated places over Punjab and north Uttar Pradesh.

♦  Thunderstorm accompanied with gusty winds likely at isolated places over  Haryana, Chandigarh & Delhi.

 

11  April (Day 5):

♦  Thunderstorm accompanied with gusty winds likely at isolated places over Sub­Himalayan West Bengal  & Sikkim, Assam & Meghalaya  and  Nagaland, Manipur, Mizoram & Tripura.