Dennis 1981
Visible satellite picture of Tropical Storm Dennis at
831 AM August 8th. The maximum surface wind speed
estimate at this time is 50 mph.
Visible satellite picture of Tropical Storm Dennis at 1031 AM
August 18th. The poorly defined cloud vortex is
estimated to be near Lake Okeechobee in
east-central Florida.
Visible satellite picture of Dennis at 430 PM August 20th.
Dennis is a minimal hurricane at this time with maximum
surface winds estimated at 80 mph and is centered east
of the norther Outer Banks.
| Date | Time | Point | Latitude | Longitude | Max Winds (mph) | Pressure (mb) |
| 8/7 | 2 AM | 1 | 10.5 | 25.7 | 35 | 1009 |
| 8/7 | 8 AM | 2 | 10.8 | 28.1 | 35 | 1008 |
| 8/7 | 2 PM | 3 | 11.0 | 29.6 | 35 | 1007 |
| 8/7 | 8 PM | 4 | 11.3 | 31.3 | 40 | 1006 |
| 8/8 | 2 AM | 5 | 11.7 | 33.1 | 40 | 1005 |
| 8/8 | 8 AM | 6 | 12.0 | 35.0 | 40 | 1004 |
| 8/8 | 2 PM | 7 | 12.5 | 36.7 | 45 | 1003 |
| 8/8 | 8 PM | 8 | 12.8 | 38.7 | 45 | 1002 |
| 8/9 | 2 AM | 9 | 13.1 | 40.8 | 45 | 1001 |
| 8/9 | 8 AM | 10 | 13.3 | 43.0 | 45 | 1001 |
| 8/9 | 2 PM | 11 | 13.5 | 45.0 | 45 | 1001 |
| 8/9 | 8 PM | 12 | 13.5 | 47.0 | 45 | 1001 |
| 8/10 | 2 AM | 13 | 13.5 | 49.0 | 45 | 1002 |
| 8/10 | 8 AM | 14 | 13.5 | 51.0 | 45 | 1004 |
| 8/10 | 2 PM | 15 | 13.6 | 52.9 | 40 | 1006 |
| 8/10 | 8 PM | 16 | 13.8 | 54.9 | 35 | 1007 |
| 8/11 | 2 AM | 17 | 14.0 | 56.5 | 35 | 1008 |
| 8/11 | 8 AM | 18 | 14.3 | 58.3 | 35 | 1009 |
| 8/11 | 2 PM | 19 | 14.6 | 60.1 | 35 | 1010 |
| 8/11 | 8 PM | 20 | 14.9 | 61.9 | 30 | 1010 |
| 8/12 | 2 AM | 21 | 15.2 | 63.8 | 30 | 1011 |
| 8/12 | 8 AM | 22 | 15.4 | 65.7 | 30 | 1011 |
| 8/12 | 2 PM | 23 | 15.6 | 67.6 | 30 | 1011 |
| 8/12 | 8 PM | 24 | 15.8 | 69.5 | 15 | * |
| 8/13 | 2 AM | 25 | 15.9 | 71.2 | 15 | * |
| 8/13 | 8 AM | 26 | 16.1 | 72.8 | 15 | * |
| 8/13 | 2 PM | 27 | 16.4 | 74.4 | 15 | * |
| 8/13 | 8 PM | 28 | 16.8 | 75.7 | 15 | * |
| 8/14 | 2 AM | 29 | 17.4 | 77.0 | 15 | * |
| 8/14 | 8 AM | 30 | 18.0 | 78.0 | 15 | * |
| 8/14 | 2 PM | 31 | 18.8 | 78.8 | 15 | * |
| 8/14 | 8 PM | 32 | 19.5 | 79.5 | 15 | * |
| 8/15 | 2 AM | 33 | 20.3 | 80.0 | 15 | * |
| 8/15 | 8 AM | 34 | 21.0 | 80.5 | 15 | * |
| 8/15 | 2 PM | 35 | 21.7 | 80.8 | 35 | 1007 |
| 8/15 | 8 PM | 36 | 22.4 | 81.0 | 40 | 1005 |
| 8/16 | 2 AM | 37 | 23.0 | 81.2 | 40 | 1003 |
| 8/16 | 8 AM | 38 | 23.8 | 81.4 | 40 | 1001 |
| 8/16 | 2 PM | 39 | 24.5 | 81.3 | 40 | 1000 |
| 8/16 | 8 PM | 40 | 24.9 | 81.3 | 40 | 998 |
| 8/17 | 2 AM | 41 | 25.2 | 81.2 | 40 | 999 |
| 8/17 | 8 AM | 42 | 25.8 | 81.2 | 40 | 999 |
| 8/17 | 2 PM | 43 | 26.2 | 81.2 | 40 | 1001 |
| 8/17 | 8 PM | 44 | 26.5 | 81.2 | 40 | 1003 |
| 8/18 | 2 AM | 45 | 26.8 | 81.1 | 40 | 1004 |
| 8/18 | 8 AM | 46 | 27.2 | 81.0 | 40 | 1005 |
| 8/18 | 2 PM | 47 | 27.6 | 81.0 | 40 | 1005 |
| 8/18 | 8 PM | 48 | 28.7 | 80.8 | 40 | 1004 |
| 8/19 | 2 AM | 49 | 29.7 | 80.8 | 45 | 1003 |
| 8/19 | 8 AM | 50 | 31.0 | 80.8 | 45 | 1002 |
| 8/19 | 2 PM | 51 | 32.2 | 79.9 | 50 | 1001 |
| 8/19 | 8 PM | 52 | 33.4 | 78.8 | 60 | 999 |
| 8/20 | 2 AM | 53 | 34.7 | 77.0 | 65 | 998 |
| 8/20 | 8 AM | 54 | 35.5 | 75.2 | 70 | 997 |
| 8/20 | 2 PM | 55 | 36.3 | 73.0 | 75 | 995 |
| 8/20 | 8 PM | 56 | 37.1 | 70.4 | 80 | 995 |
| 8/21 | 2 AM | 57 | 37.8 | 68.0 | 65 | 998 |
| 8/21 | 8 AM | 58 | 38.1 | 65.4 | 50 | 1000 |
| 8/21 | 2 PM | 59 | 38.4 | 62.8 | 45 | 1003 |
*The system was only a tropical wave at this time.