EF0 tornado in Grimes County, Texas

Numerous trees uprooted around Wallace Pack prison complex. One of the watch tower standers witnessed tremendous increase in wind embedded in heavy rain; vehicles in parking lot were moved in different directions.

Strong upper level disturbances combined with above average moisture levels and favorable upper level wind patterns to produce a round of severe thunderstorms that eventually trained and produced excessive rainfall and flash flood during the afternoon hours of the 26th and on into the overnight and early morning hours of the 27th. Rainfall totals of 6 to 10 inches were common over the north and northwestern parts of Harris County into Waller, Montgomery, and Washington Counties, with much of the rain falling in a 3 to 6 hour period. Portions of Washington County recorded over 12 inches of rainfall in a 3 hour period. This event was the fourth federal disaster declaration for Harris County in the last year.