The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| Event typeevent_type | Heavy Rain |
|---|---|
| NOAA NCEI event IDncei_event_id | 657,229 |
| Episode IDepisode_id | 109,340 |
| Begin UTCbegin_utc | 2016-08-29T02:30:00+00:00 |
| End UTCend_utc | 2016-08-29T10:00:00+00:00 |
| Statestate | NEBRASKA |
| County/zone typecz_type | C |
| County/zone namecz_name | NUCKOLLS |
| Latitudelat | 40.280 |
| Longitudelon | -98.110 |
| End latitudeend_lat | 40.280 |
| End longitudeend_lon | -98.110 |
| Deaths directdeaths_direct | 0 |
| Deaths indirectdeaths_indirect | 0 |
| Injuries directinjuries_direct | 0 |
| Injuries indirectinjuries_indirect | 0 |
| Damage propertydamage_property | 0.00K |
| Damage cropsdamage_crops | 0.00K |
| Weather forecast office sourcewfo_source | CoCoRaHS |
| Episode narrativeepisode_narrative | In only a few hours' time between the late evening of Sunday the 28th and the early morning of Monday the 29th, a nearly stationary cluster of thunderstorms drenched much of southern Adams, northern Webster and adjacent small portions of Franklin and Nuckolls counties with 3-7 inches of heavy rain, at least temporarily halting a worsening drought (more on this below). Extensive flooding ensued along the Little Blue River and its tributaries (including Ash Creek) and numerous rural county roads/bridges were flooded out/damaged, some of which remained barricaded for several days. The overall-worst flooding concentrated within south central Adams County, including the Crystal Lake Recreation Area and campground located just north of Ayr along the Little Blue River. There, extensive damage occurred to electrical boxes, buildings and picnic tables, and the park remained closed to the public for over two weeks before reopening in mid-September. Along the Little Blue itself, flood waters quickly worked downstream from Ayr, reaching the Pauline area on the morning of the 29th and the automated river gauge near Deweese by early evening. At this gauge site, the river crested around 11 feet (one foot above minor flood stage) during the overnight hours before falling below flood stage on the morning of the 30th. Minor flooding likely continued along the river through much of northeastern Nuckolls County, but no flooding was reported farther downstream into Thayer County. This event was all about flooding, as thunderstorms otherwise remained sub-severe and yielded no reports of large hail or damaging winds. ||This was likely the most notable flooding event to strike the Adams/Webster County line area in several decades, especially considering that the majority of accumulation occurred in only a four-hour period between 10 p.m. and 2 a.m. CDT. Some of the most impressive rain totals featured: 7.27 two miles northeast of Blue Hill (NeRAIN observer), 6.62 four miles southwest of Blue Hill (NWS observer), 5.60 four miles south-southeast of Roseland (NeRAIN), 5.50 in Blue Hill (personal weather station) and 3.81 five miles south-southeast of Deweese (NeRAIN). In an ironic twist, leading up to this event the southern Adams/northern Webster locale had been one of the driest places in the entire state of Nebraska for the summer, having recently been placed in a Severe Drought (D2) category by the U.S. Drought Monitor. As a striking example of this sudden transition from drought to flood, the NWS cooperative observer near Blue Hill tallied merely 2.77 of rain from Jun 1-Aug 27 (roughly 25% of normal) and then received more than twice this amount (6.62) on this single night! ||Taking a closer look at event timing and evolution, things got underway between 9:30-10:30 p.m. CDT on the 28th as thunderstorms erupted along a northwest-southeast axis extending from western Adams County down into Republic/Washington counties in Kansas. Over the next several hours, the northwestern edge of this initial activity evolved into a quasi-stationary storm cluster that essentially anchored itself over the southern Adams/northern Webster area. By 2 a.m. CDT on the 29th, convection finally began to diminish in intensity/rainfall rates, leaving only lingering lighter showers that dissipated completely by 5 a.m. CDT. This was a rather sneaky mesoscale flood event, as although low chances for thunderstorms were in the forecast, computer models (even in the very short term) were not spotlighting the potential for significant flooding. Not surprisingly, forcing aloft was rather nebulous, not uncommon by late-August standards. In the mid-upper levels, the Central Plains resided under fairly weak south-southwest flow, directed between broad ridging over the southeastern CONUS and a slow-moving trough to the west anchored by a modest closed low over New Mexico. Parameters were not conducive to severe storms given deep-layer wind shear averaging well under 30 knots and weak mid-level lapse rates. However, favorable factors for slow-moving, heavy rainers included: the presence of subtle mid-level waves, precipitable water values averaging over 1.5 and slightly-enhanced flow between 850-700 millibars during the night, resulting in increased deep moisture convergence. At the surface, there were no notable features to speak of, although dewpoints averaging in the mid-60s F were indicative of the moist airmass. |
| Event narrativeevent_narrative | Storm total rainfall of 3.81 inches...all of which fell between 9:30 p.m. and 5 a.m. CDT. |
| Yearyear | 2,016 |
Provenance
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Storage: spine