Forecast for Monday, April 14

Issued: Saturday, April 12 Launch Weather Officer: 45th Weather Squadron Synoptic Discussion: "A cold front will transit the Florida peninsula today with a small threat of an isolated thunderstorm by late afternoon. The front will migrate over Central Florida Sunday morning with cloudy conditions and lingering showers through the day. There is a small threat of lightning associated with the frontal boundary through Sunday afternoon. Wind speeds increase from the West and Northwest behind the front Sunday evening with gusts in the low to mid 20s (230 feet). "For MLP roll on Sunday morning, winds are expected to be below the roll constraint of 32 kts (contamination). However, by evening, winds are expected to increase with gusts approaching the standby configuration (27 kts) during the exposure period. "For launch day, high pressure continues to build-in with gusty Northwest winds persisting in the afternoon gusting in the mid 20s during the window. The primary concerns for launch day are gusty winds and a slight risk of thick clouds associated with the proximity of the front to the South. "In the event of a 24 hour delay, a secondary cold front increases the pressure gradient with gusty winds Tuesday afternoon increasing to the mid to upper 20s and persisting through the next 24 hours. There is a threat of a thick cloud rule violation associated with isolated showers over the Atlantic." Clouds: Cumulus scattered at 4,000 feet with tops at 7,000 feet; and Cirrus scattered at 30,000 feet with tops at 35,000 feet Visibility: 7 miles Launch Pad Winds: Northwesterly from 300 degrees at 20 to 26 knots Temperature: 63-64 degrees F Relative Humidity: 50 percent Solar Activity: Low Probability of Violating Weather Constraints: 40 percent Concerns: Ground winds and thick clouds

Forecast for 24-hour delay

Tuesday's Probability of Violating Constraints: 60 percent Concerns: Ground winds and thick clouds

Times of note

Monday's launch window: 4:12 to 5:12 p.m. EDT Tuesday's launch window: 4:08 to 5:08 p.m. EDT