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Weather Snapshot: Hurricane Dean August 23, 2007
August 23 2007 8:23PM UTC [341.8kb image]

Hurricane Dean

These infrared, microwave, and visible images were created with data retrieved by the Atmospheric Infrared Sounder (AIRS) on NASA's Aqua satellite.

From the National Weather Service:

TROPICAL DEPRESSION DEAN FORECAST/ADVISORY NUMBER 40
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL042007
0300 UTC THU AUG 23 2007

TROPICAL DEPRESSION CENTER LOCATED NEAR 20.5N 100.0W AT 23/0300Z POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE WEST OR 270 DEGREES AT 18 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 1000 MB MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT.

Infrared Images
Because infrared radiation does not penetrate through clouds, AIRS infrared images show either the temperature of the cloud tops or the surface of the Earth in cloud-free regions. The lowest temperatures (in purple) are associated with high, cold cloud tops that make up the top of the storm. In cloud-free areas the AIRS instrument will receive the infrared radiation from the surface of the Earth, resulting in the warmest temperatures (orange/red).

Microwave Images
In the AIRS microwave imagery, deep blue areas in storms show where the most precipitation occurs, or where ice crystals are present in the convective cloud tops. Outside of these storm regions, deep blue areas may also occur over the sea surface due to its low radiation emissivity. On the other hand, land appears much warmer due to its high radiation emissivity.

Hurricane Dean Archives

Aug 23

Aug 22

Aug 21

Aug 21

Aug 20

Aug 19

Aug 18

Aug 17

Aug 16

Aug 15

Quick Stats

Location
The coast of Mexico from Manzanillo to Mazatlan

Categorization
Tropical Depression

Sustained Winds
35 mph (56 km/hr)

Related Links

NASA Hurricane Portal

National Hurricane Center

Unisys Hurricane/Typhoon

Tropical Cyclone Advisory Summary

Tropical Storm Risk

Hurricane Forecasts

NRL Tropical Cyclone Page

Upper Ocean Heat Content & Tropical Cyclone Heat Potential

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Japan Meteorological Agency

Jet Stream Map