Spaceflight Now Home

Mission Briefing


Sign up for our NewsAlert service and have the latest news in astronomy and space e-mailed direct to your desktop.

Enter your e-mail address:

Privacy note: your e-mail address will not be used for any other purpose.

Launch weather forecast
Posted: August 27, 2004

 Forecast for Friday, August 27

Issued: Friday, August 27
Launch Weather Officers: F. Clay Flinn, Johnny Weems, 45th Weather Squadron

Synoptic Discussion: "A trough of lower pressure will influence the weather over the peninsula the next two days which will enhance afternoon thunderstorm activity. This will result in East to Southeasterly surface winds as the sea breeze sets up in the early afternoon. Initial thunderstorm development along the seabreeze is expected around the noon hour near the coast and will push slowly toward the West. The seabreeze should not migrate very far inland with thunderstorm activity remaining closer to the coast. Thunderstorms are also expected to form inland during the afternoon hours. Steering level winds throughout the column have become less favorable and will act to steer thunderstorm activity back toward the coast in the mid to late afternoon time period.

"The main concern for the launch will be isolated thunderstorms within 10 nm of the complex and associated clouds (anvil, debris)."

Clouds: Scattered at 3,000 feet with 1-2/8ths sky coverage and tops at 5,000 feet, Scattered at 10,000 feet with 1-2/8ths sky coverage and tops at 14,000 feet; Scattered at 25,000 feet with 3-4/8ths sky coverage and tops at 28,000 feet

Visibility: 7 miles

Launch Pad Winds: Southeasterly from 130 degrees at 12 to 15 knots

Temperature: 83 degrees F

Relative Humidity: 80 percent

Weather: Isolated Thunderstorms

Solar Activity: Low

Probability of Violating Weather Constraints: 70 percent

Concerns: Isolated showers/thunderstorms, anvil clouds, debris clouds


 Times of note

Launch period: 6:00 to 8:00 p.m. EDT (2200-0000 GMT)
Moonrise: 6:30 p.m. EDT (2230 GMT)
Sunset: 7:49 p.m. EDT (2349 GMT)


 Forecast for 24- and 48-hour delays

Saturday's Probability of Violating Constraints: 80 percent
Concerns: Isolated showers/thunderstorms, anvil clouds, debris clouds

Sunday's Probability of Violating Constraints: N/A
Concerns: N/A