Product: Air Force High Density (HDOB) Message (URNT15 KNHC)
Transmitted: 28th day of the month at 19:34Z
Date: August 28, 2008
Aircraft: Air Force Aircraft (Last 3 digits of the tail number are 300)
Storm Number: 07
Storm Name: Gustav (in the North Atlantic basin)
Mission Number: 8
Observation Number: 29
HDOB Observations
Independent Calculations from our site ( About )
TimeCoordinatesAircraft
Static Air Pressure		Aircraft
Geopotential Height		Extrapolated
Surface Pressure		D-valueFlight Level Wind (30 sec. Avg.) Air Temp.Dew PointPeak (10 sec. Avg.)
Flight Level Wind		SFMR
Peak (10s Avg.) Sfc. Wind		SFMR
Rain Rate		Estimated Surface Wind (30 sec. Avg.)
Using Estimated Reduction Factor		Peak Wind at Flight Level to
Est. Surface Reduction Factor
19:24:30Z17.700N 77.483W697.1 mb
(~ 20.59 inHg)		3,118 meters
(~ 10,230 feet)		1002.0 mb
(~ 29.59 inHg)		-From 5° at 21 knots
(From the N at ~ 24.1 mph)		8.8°C
(~ 47.8°F)		8.8°C
(~ 47.8°F)		21 knots
(~ 24.1 mph)		----
19:25:00Z17.700N 77.517W696.9 mb
(~ 20.58 inHg)		3,120 meters
(~ 10,236 feet)		1002.4 mb
(~ 29.60 inHg)		-From 7° at 19 knots
(From the N at ~ 21.8 mph)		8.6°C
(~ 47.5°F)		8.6°C
(~ 47.5°F)		20 knots
(~ 23.0 mph)		----
19:25:30Z17.700N 77.550W697.9 mb
(~ 20.61 inHg)		3,110 meters
(~ 10,203 feet)		1001.8 mb
(~ 29.58 inHg)		-From 358° at 18 knots
(From the N at ~ 20.7 mph)		8.9°C
(~ 48.0°F)		8.9°C
(~ 48.0°F)		19 knots
(~ 21.8 mph)		----
19:26:00Z17.700N 77.583W677.9 mb
(~ 20.02 inHg)		3,335 meters
(~ 10,942 feet)		999.5 mb
(~ 29.52 inHg)		-From 352° at 24 knots
(From the N at ~ 27.6 mph)		8.8°C
(~ 47.8°F)		8.8°C
(~ 47.8°F)		24 knots
(~ 27.6 mph)		----
19:26:30Z17.717N 77.600W655.5 mb
(~ 19.36 inHg)		3,614 meters
(~ 11,857 feet)		999.1 mb
(~ 29.50 inHg)		-From 4° at 26 knots
(From the N at ~ 29.9 mph)		7.3°C
(~ 45.1°F)		7.3°C
(~ 45.1°F)		27 knots
(~ 31.0 mph)		----
19:27:00Z17.717N 77.633W637.3 mb
(~ 18.82 inHg)		3,858 meters
(~ 12,657 feet)		999.2 mb
(~ 29.51 inHg)		-From 3° at 31 knots
(From the N at ~ 35.6 mph)		5.9°C
(~ 42.6°F)		5.9°C
(~ 42.6°F)		32 knots
(~ 36.8 mph)		----
19:27:30Z17.733N 77.650W620.2 mb
(~ 18.31 inHg)		4,080 meters
(~ 13,386 feet)		999.4 mb
(~ 29.51 inHg)		-From 6° at 34 knots
(From the N at ~ 39.1 mph)		4.6°C
(~ 40.3°F)		4.6°C
(~ 40.3°F)		35 knots
(~ 40.2 mph)		----
19:28:00Z17.750N 77.683W604.7 mb
(~ 17.86 inHg)		4,286 meters
(~ 14,062 feet)		999.1 mb
(~ 29.50 inHg)		-From 7° at 33 knots
(From the N at ~ 37.9 mph)		3.4°C
(~ 38.1°F)		3.4°C
(~ 38.1°F)		35 knots
(~ 40.2 mph)		----
19:28:30Z17.750N 77.700W590.9 mb
(~ 17.45 inHg)		4,463 meters
(~ 14,642 feet)		996.3 mb
(~ 29.42 inHg)		-From 9° at 32 knots
(From the N at ~ 36.8 mph)		3.2°C
(~ 37.8°F)		3.2°C
(~ 37.8°F)		33 knots
(~ 37.9 mph)		----
19:29:00Z17.767N 77.733W576.4 mb
(~ 17.02 inHg)		4,664 meters
(~ 15,302 feet)		997.6 mb
(~ 29.46 inHg)		-From 10° at 33 knots
(From the N at ~ 37.9 mph)		1.3°C
(~ 34.3°F)		1.3°C
(~ 34.3°F)		33 knots
(~ 37.9 mph)		----
19:29:30Z17.783N 77.767W561.8 mb
(~ 16.59 inHg)		4,870 meters
(~ 15,978 feet)		998.2 mb
(~ 29.48 inHg)		-From 16° at 33 knots
(From the NNE at ~ 37.9 mph)		-0.2°C
(~ 31.6°F)		-0.2°C
(~ 31.6°F)		34 knots
(~ 39.1 mph)		----
19:30:00Z17.800N 77.783W548.6 mb
(~ 16.20 inHg)		5,061 meters
(~ 16,604 feet)		-179 meters
(~ 587 feet)		From 17° at 32 knots
(From the NNE at ~ 36.8 mph)		-1.5°C
(~ 29.3°F)		-1.5°C
(~ 29.3°F)		33 knots
(~ 37.9 mph)		----
19:30:30Z17.800N 77.817W536.8 mb
(~ 15.85 inHg)		5,236 meters
(~ 17,178 feet)		-191 meters
(~ 627 feet)		From 18° at 33 knots
(From the NNE at ~ 37.9 mph)		-2.1°C
(~ 28.2°F)		-2.1°C
(~ 28.2°F)		34 knots
(~ 39.1 mph)		----
19:31:00Z17.817N 77.850W526.3 mb
(~ 15.54 inHg)		5,394 meters
(~ 17,697 feet)		-202 meters
(~ 663 feet)		From 25° at 36 knots
(From the NNE at ~ 41.4 mph)		-2.4°C
(~ 27.7°F)		-2.4°C
(~ 27.7°F)		38 knots
(~ 43.7 mph)		----
19:31:30Z17.833N 77.867W515.6 mb
(~ 15.23 inHg)		5,559 meters
(~ 18,238 feet)		-215 meters
(~ 705 feet)		From 26° at 34 knots
(From the NNE at ~ 39.1 mph)		-3.6°C
(~ 25.5°F)		-3.6°C
(~ 25.5°F)		35 knots
(~ 40.2 mph)		----
19:32:00Z17.833N 77.900W506.0 mb
(~ 14.94 inHg)		5,709 meters
(~ 18,730 feet)		-225 meters
(~ 738 feet)		From 25° at 36 knots
(From the NNE at ~ 41.4 mph)		-5.1°C
(~ 22.8°F)		-5.1°C
(~ 22.8°F)		37 knots
(~ 42.5 mph)		----
19:32:30Z17.850N 77.933W495.9 mb
(~ 14.64 inHg)		5,868 meters
(~ 19,252 feet)		-236 meters
(~ 774 feet)		From 27° at 36 knots
(From the NNE at ~ 41.4 mph)		-5.2°C
(~ 22.6°F)		-5.2°C
(~ 22.6°F)		37 knots
(~ 42.5 mph)		----
19:33:00Z17.867N 77.950W485.8 mb
(~ 14.35 inHg)		6,032 meters
(~ 19,790 feet)		-248 meters
(~ 814 feet)		From 31° at 38 knots
(From the NNE at ~ 43.7 mph)		-6.1°C
(~ 21.0°F)		-6.1°C
(~ 21.0°F)		38 knots
(~ 43.7 mph)		----
19:33:30Z17.883N 77.983W476.3 mb
(~ 14.07 inHg)		6,185 meters
(~ 20,292 feet)		-258 meters
(~ 846 feet)		From 27° at 38 knots
(From the NNE at ~ 43.7 mph)		-6.0°C
(~ 21.2°F)		-6.0°C
(~ 21.2°F)		39 knots
(~ 44.8 mph)		----
19:34:00Z17.883N 78.017W467.8 mb
(~ 13.81 inHg)		6,329 meters
(~ 20,764 feet)		-268 meters
(~ 879 feet)		From 27° at 38 knots
(From the NNE at ~ 43.7 mph)		-6.9°C
(~ 19.6°F)		-6.9°C
(~ 19.6°F)		38 knots
(~ 43.7 mph)		----
TimeCoordinatesAircraft
Static Air Pressure		Aircraft
Geopotential Height		Extrapolated
Surface Pressure		D-valueFlight Level Wind (30 sec. Avg.) Air Temp.Dew PointPeak (10 sec. Avg.)
Flight Level Wind		SFMR
Peak (10s Avg.) Sfc. Wind		SFMR
Rain Rate		Estimated Surface Wind (30 sec. Avg.)
Using Estimated Reduction Factor		Peak Wind at Flight Level to
Est. Surface Reduction Factor
HDOB Observations
Independent Calculations from our site ( About )

Please note, suspect coordinates are not plotted.

Suspect values are noted by an asterisk (*). 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.