A somewhat rare, late-night high wind event swept from west-to-east across South Central Nebraska primarily between midnight-4 a.m. on this Friday, featuring at least a brief period of sustained west winds of generally 30-40 MPH and gusts mainly into the 45-55 MPH range. Although most automated weather sensors fell at least slightly short of breaching high wind warning criteria, Ord airport recorded a peak wind gust of 59 MPH at 3:25 a.m. Other peak gusts of at least 50 MPH at area airports included: 53 MPH at Kearney, 51 MPH at Hastings and Aurora, and 50 MPH at Grand Island. Although noticeably breezy conditions persisted well into the daylight hours, any lingering 40+ MPH gusts abated by sunrise. No precipitation fell during this event.
Unlike most cold season high wind episodes that occur during the day, this one was driven by unusually strong low-level winds and pressure rises/downward momentum transfer behind an eastward-surging cold front. This front trailed southward from a deep, roughly 990 millibar surface low that tracked across northern South Dakota during the night. In the mid-levels, and slightly south of the surface low track, a compact-but-strong disturbance moved along the NE/SD border area. One of the most striking features of this event was the intensity of winds a few thousand feet above the surface, as speeds at the 850 millibar level peaked at 60-80 knots. Fortunately, limited nocturnal mixing was unable to usher the full ferocity of these potentially very damaging winds down to the surface.