Mormon History, Monday, Apr 6, 1846.

[Apostle Willard Richards Journal] Hickory Grove Encampment, Monday, April 6, 1846. Morning dark and rainy, wind southeast. About 6 o'clock morning, the wagons commenced rolling out double teams. The teams continued returning for the other wagons and about noon the ground was cleared except Dr. Richard's tent, carriage, and 2 wagons. The doctor was not able to remove till afternoon when the water in the creek had risen so high that is was impossible. The company passed over the east and middle forks of Locust Creek and encamped on the west bank about 3 miles distance. The forks of Locust Creek are about 1 mile distance across at this point. The pioneers built a bridge about 70 feet in length over the middle fork, which they called the Pioneer's bridge. The artillery company built another bridge over a slough at the east fork.
Incessant rain through the day. Our teams were hard to feed on buds and grass, as there was no corn in camp. From ½ past 8 o'clock evening a tremendous shower of rain [fell] accompanied by thunder and lightning, the wind blowing a gale from the northwest which felled a tree about 42 inches through across Brother Tanner's wagon in which was 3 individuals which escaped unhurt. The forest was so dense on Locust that the first and fifth companies and artillery experienced but little damage from the storm. The tents of second and fourth were mostly blown down. Dr. Richard's tent pins were sometimes floating in the air, but by the attention of 8 or 10 persons [among whom] was Allen G. Stout and family, the pins were again driven and the tent made fast. President Young was out in the rain all day arranging the wagons, pitching tents, chopping wood, and so on, until all were comfortable. The doctor [was] working in his shirt sleeves and flaps through the rain until he was perfectly wet to the skin, sometime lying flat on the ground holding down the tent while the pins were driving. Henry Russell was out in the rain through the whole gale driving tent pins.

[source: Apostle Willard Richards Journal]