I have now found the Navy moving images, these are updated every half hour, this one is 11:00 BZT :
This is now showing two distinct cloud movement levels.. . .The upper cloud streaming over Belize from the SSW, developing into cloud as it goes over water. . ..The lower level is moving down from Yucatan, NNE and bringing increasing cloud with it, which will cause rain showers, first in the north, then increasingly southwards.
The cloud is thinning as the day warms up.
From Belmopan... 11:30pm
That large area of wet weather just off the Belize coast,is moving further away.. . . .But the lower weather is still moving down from the Yucatan. . . That part cloud will probably keep the temperatures up a bit over night. ..I expect a fair bit of Sun on Wed, there could be a little rain, i don't think much though.