Forecast for Wednesday, September 21

Issued: Saturday, September 17 Launch Weather Officer: Joel Tumbiolo, 45th Weather Squadron Synoptic Discussion: "Two areas of concern in the tropics will be monitored over the next several days. Disturbances northeast of Puerto Rico and east of the southern Leeward Islands are expected to develop into a tropical cyclones. The first disturbance will move westerly over southern Florida on a Sunday-Monday timeframe. Breezy onshore flow and showers will result. The second disturbance will move westnorthwest through the Islands over the next few days. "Combination of surface high pressure to the north and the previously mentioned tropical disturbances to the south will result in a continuation of onshore flow and a chance for showers through launch day. "Launch window concerns will be westward moving cumulus clouds and showers over the near coastal waters." Clouds: Scattered at 3,000 feet and tops at 15,000 feet; Scattered at 25,000 feet and tops at 27,000 feet Visibility: 7 miles Launch Pad Winds: Northeasterly from 060 degrees at 10 gusting to 15 knots Temperature: 82 to 84 degrees F Relative Humidity: 70-75 percent Weather: Showers in the vicinity Probability of Violating Weather Constraints: 40 percent Concerns: Cumulus Cloud Rule, Anvil Cloud Rule, Precipitation

Times of note

Wednesday's launch window: 11:53 p.m. to 12:21 a.m. EDT Thursday's launch window: 11:49 p.m. to 12:17 a.m. EDT

24-hour Delay Forecast

Thursday's Probability of Violating Constraints: 40 percent Concerns: Cumulus Cloud Rule, Anvil Cloud Rule, Precipitation