GOES-10 Science Test
Weather Synopsis - 11 April/12UTC to 12 April/12UTC 1998

Synoptic Situation:

High amplitude flow aloft continued, as the ridge of high pressure built eastward into the Mississippi Valley and Great Lakes region. A broad trough of low pressure was situated over the western US, while another trough lingered off the East Coast. The jet stream continued to curved across the southern states.

At the surface, high pressure covered the eastern 2/3 of the US. Cyclogenesis occurred over the western Dakotas , and a weak frontal system was crossing the Rockies.

Weather Conditions:

No strong/severe convection was reported this period.

Precipitation was widespread across the western third of the US, with amounts up to 0.5-1.0 inches reported across southern California.

Light precipitation (less than 0.25 inch) was also observed across the northern Plains and Great Lakes regions.