2011 September 04 18:40 UT
NOAA-18 satellite AVHRR 3 channel color composite daytime image. A closer view (269 Kb) is seen by clicking on this small image. The maximum sustained winds are 100 mph.

2011 September 04 20:46 UT
NOAA-15 satellite AVHRR 3 channel color composite daytime image. A closer view (282 Kb) is seen by clicking on this small image.

2011 September 05 07:04 UT
NOAA-18 satellite AVHRR channel 4 nighttime image. A closer view (210 Kb) is seen by clicking on this small image. The maximum sustained winds have increased to 105 mph.

2011 September 05 09:03 UT
NOAA-15 satellite AVHRR channel 4 early morning image. A closer view (218 Kb) is seen by clicking on this small image. The maximum sustained winds have decreased to 100 mph.

2011 September 05 18:30 UT
NOAA-18 satellite AVHRR 3 channel color composite daytime image. A closer view (323 Kb) is seen by clicking on this small image. The maximum sustained winds have increased to 110 mph.

2011 September 06 06:53 UT
NOAA-18 satellite AVHRR channel 4 nighttime image. A closer view (258 Kb) is seen by clicking on this small image. The maximum sustained winds have increased to 135 mph, making Katia a Category 4 on the Saffir-Simpson scale.

2011 September 06 18:19 UT
NOAA-18 satellite AVHRR 3 channel color composite daytime image. A closer view (309 Kb) is seen by clicking on this small image. The maximum sustained winds have decreased to 115 mph.

2011 September 06 20:00 UT
NOAA-15 satellite AVHRR 3 channel color composite daytime image. A closer view (219 Kb) is seen by clicking on this small image.

2011 September 07 06:43 UT
NOAA-18 satellite AVHRR channel 4 nighttime image. A closer view (271 Kb) is seen by clicking on this small image. The maximum sustained winds have decreased to 105 mph.

2011 September 07 18:08 UT
NOAA-18 satellite AVHRR 3 channel color composite daytime image. A closer view (316 Kb) is seen by clicking on this small image. The maximum sustained winds have decreased to 85 mph.

2011 September 07 21:14 UT
NOAA-15 satellite AVHRR 3 channel color composite daytime image. A closer view (318 Kb) is seen by clicking on this small image. The maximum sustained winds have decreased to 80 mph.

2011 September 08 06:32 UT
NOAA-18 satellite AVHRR channel 4 nighttime image. A closer view (218 Kb) is seen by clicking on this small image. The maximum sustained winds have increased to 90 mph.

2011 September 08 09:34 UT
NOAA-15 satellite AVHRR channel 4 early morning image. A closer view (299 Kb) is seen by clicking on this small image.

2011 September 08 17:58 UT
NOAA-18 satellite AVHRR 3 channel color composite daytime image. A closer view (318 Kb) is seen by clicking on this small image.

2011 September 08 20:50 UT
NOAA-15 satellite AVHRR 3 channel color composite daytime image. A closer view (358 Kb) is seen by clicking on this small image. The maximum sustained winds have decreased to 85 mph.

2011 September 09 06:22 UT
NOAA-18 satellite AVHRR channel 4 nighttime image. A closer view (172 Kb) is seen by clicking on this small image.

2011 September 09 08:01 UT
NOAA-18 satellite AVHRR channel 4 early morning image. A closer view (230 Kb) is seen by clicking on this small image.

2011 September 09 17:47 UT
NOAA-18 satellite AVHRR 3 channel color composite daytime image. A closer view (274 Kb) is seen by clicking on this small image.

2011 September 09 20:26 UT
NOAA-15 satellite AVHRR 3 channel color composite daytime image. A closer view (303 Kb) is seen by clicking on this small image.

2011 September 10 06:11 UT
NOAA-18 satellite AVHRR channel 4 nighttime image. A closer view (183 Kb) is seen by clicking on this small image.