Eastern Range Operation Forecast Op Number: F2613
Issued:    30 Jul 01/0630 EDT 
Valid:  31 Jul 01/1632Z - 1634Z (1232 - 1234 EDT)  	
		
Vehicle/Payload:	Delta II/GENESIS Mission	
		
Location:	SLC 17A	
		
Launch Weather Officer:	Johnny W Weems	
		
Synoptic Discussion:	Surface and mid level ridge has temporarily moved
south  and is expected to be positioned across South Central FL by late
today today allowing the trough along the Eastern U.S seaboard to slightly
strengthen.  Today, mid and low level gradient flow will is expected to
be weak westerly with shower and thunderstorm development expected a bit
later in the day due to drier than normal conditions.  The storms, once
developed, will slowly move back toward the coast.    The atmosphere over
Central FL will continue to moisten and de-stabilize thru Tuesday,
especially the northern parts of FL due to a weak boundary associated with
the mid level trough,  thus the forecast is more pessimistic.  By
Wednesday, low and mid level flow becomes southeasterly as a  tropical
wave passes across Cuba.  The main concern Tuesday is the moisture and
showers associated with the weak boundary to the north. By Wednesday, the
primary concern shifts to weather associated with disturbance over Cuba
and its interaction with the weak boundary across N Central FL.

	
Clouds	Coverage	Bases (feet)	Tops (feet)	
				
Low level	2-3/8ths 	3000	7000	
Mid Level	3-4/8ths	11000	14000	
Upper level	1-2/8ths	28000	30000	
				
Visibility:	7 miles	
		
Wind:	150/5 -7  knots	
		
Temperature:	86 F	RH:	72%	
				
Weather:	Chance of showers & thunderstorms 	
		
Overall probability of violating weather constraints:	60% 	
Primary concern(s):	Clouds & proximity of  showers & isolated
thunderstorms	
		
Overall probability of violating weather constraints for 24 hour delay:
60%

Primary concern(s):	Clouds/showers/thunderstorms	
		
Overall probability of violating weather constraints for 48 hour delay: 
40%

Primary concern(s):	Showers/thunderstorms	
		
Sunrise:	0643 EDT	
Sunset:		2014 EDT	
		
Next forecast will be issued:	Tuesday, 31 Jul 01 / 0700 EDT