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Oct. 20, 2017
5:03 Z
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Note: Extrapolated surface pressures are sometimes very incorrect. The flight level winds noted are averaged over 30 seconds. The surface winds noted are averaged over 10 seconds. Suspect data is not included. Time noted is the time of the first observation in the individual message.
Product: NOAA High Density (HDOB) Message (URNT15 KWBC)
Transmitted: 7th day of the month at 1:23Z
Date: October 7, 2017
Agency: National Oceanic and Atmospheric Administration (NOAA)
Aircraft: Gulfstream IV-SP (G-IV) (Reg. Num. N49RF)
Storm Number: 16
Storm Name: Nate (flight in the North Atlantic basin)
Mission Number: 6
Observation Number: 47
Independent Calculations (about)
Time
Coordinates Aircraft Static Air Pressure Aircraft Geo. Height Extrapolated Sfc. Pressure D-value Flight Level Wind (30 sec. Avg.) Air Temp. Dew Point Peak (10 sec. Avg.) Flight Level Wind SFMR Peak (10s Avg.) Sfc. Wind SFMR Surface Rain Rate Est. Sfc. Wind (30 sec. Avg.) Using Est. Red. Factor Peak Wind at Flight Lvl. to Est. Sfc. Red. Factor
Time
Coordinates Aircraft Static Air Pressure Aircraft Geo. Height Extrapolated Sfc. Pressure D-value Flight Level Wind (30 sec. Avg.) Air Temp. Dew Point Peak (10 sec. Avg.) Flight Level Wind SFMR Peak (10s Avg.) Sfc. Wind SFMR Surface Rain Rate Est. Sfc. Wind (30 sec. Avg.) Using Est. Red. Factor Peak Wind at Flight Lvl. to Est. Sfc. Red. Factor
01:14:00Z 27.983N 82.283W 908.6 mb
(~ 26.83 inHg)
955 meters
(~ 3,133 feet)
1013.2 mb
(~ 29.92 inHg)
- From 115° at 13 knots
(From the ESE at ~ 15.0 mph)
23.5°C
(~ 74.3°F)
-4.0°C
(~ 24.8°F)
13 knots
(~ 15.0 mph)
- - - -
01:14:30Z 27.983N 82.250W 917.3 mb
(~ 27.09 inHg)
883 meters
(~ 2,897 feet)
1013.9 mb
(~ 29.94 inHg)
- From 122° at 13 knots
(From the ESE at ~ 15.0 mph)
24.1°C
(~ 75.4°F)
-3.5°C
(~ 25.7°F)
14 knots
(~ 16.1 mph)
- - - -
01:15:00Z 27.983N 82.217W 919.8 mb
(~ 27.16 inHg)
864 meters
(~ 2,835 feet)
1013.1 mb
(~ 29.92 inHg)
- From 123° at 14 knots
(From the ESE at ~ 16.1 mph)
24.5°C
(~ 76.1°F)
-3.4°C
(~ 25.9°F)
15 knots
(~ 17.3 mph)
- - - -
01:15:30Z 27.983N 82.200W 917.1 mb
(~ 27.09 inHg)
860 meters
(~ 2,822 feet)
1011.2 mb
(~ 29.86 inHg)
- From 124° at 17 knots
(From the ESE/SE at ~ 19.6 mph)
24.6°C
(~ 76.3°F)
-3.5°C
(~ 25.7°F)
18 knots
(~ 20.7 mph)
- - - -
01:16:00Z 27.983N 82.167W 925.0 mb
(~ 27.32 inHg)
809 meters
(~ 2,654 feet)
1013.1 mb
(~ 29.92 inHg)
- From 127° at 18 knots
(From the SE at ~ 20.7 mph)
24.6°C
(~ 76.3°F)
-3.2°C
(~ 26.2°F)
19 knots
(~ 21.9 mph)
- - - -
01:16:30Z 27.983N 82.150W 936.2 mb
(~ 27.65 inHg)
687 meters
(~ 2,254 feet)
1011.7 mb
(~ 29.88 inHg)
- From 130° at 19 knots
(From the SE at ~ 21.9 mph)
26.0°C
(~ 78.8°F)
-3.1°C
(~ 26.4°F)
21 knots
(~ 24.2 mph)
- - - -
01:17:00Z 27.983N 82.117W 948.7 mb
(~ 28.02 inHg)
566 meters
(~ 1,857 feet)
1011.3 mb
(~ 29.87 inHg)
- From 131° at 22 knots
(From the SE at ~ 25.3 mph)
26.9°C
(~ 80.4°F)
-3.2°C
(~ 26.2°F)
22 knots
(~ 25.3 mph)
- - - -
01:17:30Z 27.983N 82.100W 960.0 mb
(~ 28.35 inHg)
462 meters
(~ 1,516 feet)
1011.4 mb
(~ 29.87 inHg)
- From 124° at 21 knots
(From the ESE/SE at ~ 24.2 mph)
27.7°C
(~ 81.9°F)
-3.1°C
(~ 26.4°F)
21 knots
(~ 24.2 mph)
- - - -
01:18:00Z 27.983N 82.083W 970.8 mb
(~ 28.67 inHg)
361 meters
(~ 1,184 feet)
1011.5 mb
(~ 29.87 inHg)
- From 113° at 19 knots
(From the ESE at ~ 21.9 mph)
28.0°C
(~ 82.4°F)
-3.4°C
(~ 25.9°F)
20 knots
(~ 23.0 mph)
- - - -
01:18:30Z 27.983N 82.067W 983.2 mb
(~ 29.04 inHg)
251 meters
(~ 823 feet)
1011.7 mb
(~ 29.88 inHg)
- From 96° at 21 knots
(From the E at ~ 24.2 mph)
27.7°C
(~ 81.9°F)
-3.4°C
(~ 25.9°F)
22 knots
(~ 25.3 mph)
- - - -
01:19:00Z 27.983N 82.050W 995.4 mb
(~ 29.40 inHg)
141 meters
(~ 463 feet)
1011.5 mb
(~ 29.87 inHg)
- From 98° at 17 knots
(From the E at ~ 19.6 mph)
28.1°C
(~ 82.6°F)
-3.1°C
(~ 26.4°F)
19 knots
(~ 21.9 mph)
- - - -
01:19:30Z 27.983N 82.017W 1006.5 mb
(~ 29.73 inHg)
48 meters
(~ 157 feet)
1012.0 mb
(~ 29.89 inHg)
- From 100° at 13 knots
(From the E at ~ 15.0 mph)
29.1°C
(~ 84.4°F)
-2.9°C
(~ 26.8°F)
15 knots
(~ 17.3 mph)
- - - -
01:20:00Z 27.983N 82.017W 1008.0 mb
(~ 29.77 inHg)
45 meters
(~ 148 feet)
1013.0 mb
(~ 29.92 inHg)
- From 104° at 10 knots
(From the ESE at ~ 11.5 mph)
29.7°C
(~ 85.5°F)
-5.9°C
(~ 21.4°F)
10 knots
(~ 11.5 mph)
- - - -
01:20:30Z 27.983N 82.000W 1007.5 mb
(~ 29.75 inHg)
45 meters
(~ 148 feet)
1012.9 mb
(~ 29.91 inHg)
- From 105° at 10 knots
(From the ESE at ~ 11.5 mph)
29.4°C
(~ 84.9°F)
-10.3°C
(~ 13.5°F)
11 knots
(~ 12.7 mph)
- - - -
01:21:00Z 27.983N 82.000W 1007.9 mb
(~ 29.77 inHg)
45 meters
(~ 148 feet)
1013.1 mb
(~ 29.92 inHg)
- From 100° at 7 knots
(From the E at ~ 8.1 mph)
29.2°C
(~ 84.6°F)
-13.1°C
(~ 8.4°F)
8 knots
(~ 9.2 mph)
- - - -
01:21:30Z 27.983N 82.017W 1007.8 mb
(~ 29.76 inHg)
45 meters
(~ 148 feet)
1012.9 mb
(~ 29.91 inHg)
- From 101° at 7 knots
(From the E/ESE at ~ 8.1 mph)
28.4°C
(~ 83.1°F)
-13.8°C
(~ 7.2°F)
8 knots
(~ 9.2 mph)
- - - -
01:22:00Z 27.983N 82.017W 1007.9 mb
(~ 29.77 inHg)
44 meters
(~ 144 feet)
1012.9 mb
(~ 29.91 inHg)
- From 99° at 6 knots
(From the E at ~ 6.9 mph)
28.0°C
(~ 82.4°F)
-13.9°C
(~ 7.0°F)
7 knots
(~ 8.1 mph)
- - - -
01:22:30Z 27.967N 82.017W 1007.9 mb
(~ 29.77 inHg)
44 meters
(~ 144 feet)
1012.9 mb
(~ 29.91 inHg)
- From 108° at 6 knots
(From the ESE at ~ 6.9 mph)
28.2°C
(~ 82.8°F)
-14.6°C
(~ 5.7°F)
10 knots
(~ 11.5 mph)
- - - -
01:23:00Z 27.967N 82.017W 1007.8 mb
(~ 29.76 inHg)
45 meters
(~ 148 feet)
1012.9 mb
(~ 29.91 inHg)
- From 108° at 8 knots
(From the ESE at ~ 9.2 mph)
28.2°C
(~ 82.8°F)
-15.5°C
(~ 4.1°F)
10 knots
(~ 11.5 mph)
- - - -
01:23:30Z 27.967N 82.017W 1007.9 mb
(~ 29.77 inHg)
45 meters
(~ 148 feet)
1013.0 mb
(~ 29.92 inHg)
- From 121° at 5 knots
(From the ESE at ~ 5.8 mph)
28.0°C
(~ 82.4°F)
-15.2°C
(~ 4.6°F)
6 knots
(~ 6.9 mph)
- - - -

At 01:14:00Z (first observation), the observation was 11 statute miles (18 km) to the E (86°) from Tampa, FL, USA.
At 01:23:30Z (last observation), the observation was 27 statute miles (44 km) to the E (91°) from Tampa, FL, USA.

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Notes:

Suspect values are noted by an asterisk (*) in the HDOB message(s) above. Extrapolated surface pressures often read low and at times may be very incorrect, such as during altitude changes. You may want to be suspect of any large pressure drops for a short period of time which are surrounded by periods where the pressure was very stable. Significant observations that are not suspect are noted in bold.