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The Dexes / Heavy Rain / 445609

Eventdex · Heavy Rain

GREELEY

445609 · 41.470, -98.643

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Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.

Event typeevent_typeHeavy Rain
NOAA NCEI event IDncei_event_id445,609
Episode IDepisode_id73,040
Begin UTCbegin_utc2013-04-08T12:00:00+00:00
End UTCend_utc2013-04-09T12:00:00+00:00
StatestateNEBRASKA
County/zone typecz_typeC
County/zone namecz_nameGREELEY
Latitudelat41.470
Longitudelon-98.643
End latitudeend_lat41.470
End longitudeend_lon-98.643
Deaths directdeaths_direct0
Deaths indirectdeaths_indirect0
Injuries directinjuries_direct0
Injuries indirectinjuries_indirect0
Damage propertydamage_property0.00K
Damage cropsdamage_crops0.00K
Weather forecast office sourcewfo_sourceCoCoRaHS
Episode narrativeepisode_narrativeFor roughly seven hours on this Monday night and early Tuesday morning, the first widespread severe thunderstorm event of 2013 impacted mainly the northwest two-thirds of the 24-county area, largely focused northwest of a line from Alma-Hastings-Osceola along a very strong cold front advancing southeast through the region. Between 9 PM and 4 AM CDT, several rounds of multicell storms along with a few embedded supercell structures tracked north to northeast across the area, resulting in multiple reports of severe-criteria hail ranging from quarter to golf ball size and damaging winds of at least 60-70 MPH. Some of the most extensive damage occurred in Kearney around 1 AM CDT, due to measured wind gusts up to 76 MPH and hail up to golf ball size. In addition to considerable tree damage within the city, a mobile home was destroyed and several buildings on the University of Nebraska-Kearney campus sustained damage. This included the university library where a portion of the roof was ripped off, resulting in water damage to over 6,000 books. There were also several reports of severe winds and damage in and near Holdrege between 12-1 AM CDT, including a measured 74 MPH gust at the airport, a semi truck blown over on Highway 6/34 a few miles southwest of town and a large metal outbuilding destroyed a few miles northeast of town. Other severe weather reports during the night included quarter size hail at the Hastings NWS office and golf ball size hail in Phillips. In addition to hail and wind, widespread rainfall of 1-3 inches resulted from multiple storms training over the same general southwest-to-northeast corridor, with most 2+ inch amounts concentrated within 15 miles either side of a line extending from near Holdrege-Cairo-Fullerton. A few observers reported totals in excess of 3 inches, including 3.61 near Rockville and 3.41 near Scotia. Although flooding issues were held to a minimum, water was reported over a road near St. Libory. ||The first storms of the evening developed near and north of the Interstate 80 corridor between 9 PM and midnight CDT. Some of these initial storms exhibited low-level rotation on radar, and were likely near-surface based in an environment featuring temperatures in the low-60s and dewpoints in the upper-50s, although no tornadoes were reported. After midnight CDT, storms gradually tended to become more elongated and elevated as they were undercut by the surging cold front, although interactions with this front likely enhanced the damaging winds in the Holdrege and Kearney areas. Around 4 AM CDT, the last severe-warned storm exited the local area eastward out of Polk County, and thereafter only a few weak storms lingered through sunrise. As evidence of the strength of the cold front, 4 AM CDT temperatures across South Central Nebraska ranged from 33 degrees at Ord, to 44 at Hastings, to 66 at Hebron. On the mesoscale, the primary trigger for this long-lasting severe weather episode was pronounced low-to-mid level warm air advection and resultant upglide over the top of the surging surface cold front, which effectively bisected Nebraska from southwest-to-northeast at sunset. After dark, an 850 millibar low level jet ramped up to around 40 knots, resulting in a rapid uptick in convection. Around midnight, most unstable CAPE values averaged around 1000 J/kg in the presence of very strong 0-6 kilometer vertical wind shear of 60-70 knots. On the synoptic scale, this event occurred downstream from an expansive, highly-amplified mid level trough centered near the Four Corners, and in the presence of low-amplitude shortwave troughs ejecting northeast from the parent system into the Central Plains on strengthening southwesterly flow.
Event narrativeevent_narrativeA total of 3.41 inches of rain fell. This was a 24-hour rainfall amount as of 7 am CDT. This report was relayed through the Nebraska Rainfall Assessment and Information network.
Yearyear2,013

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GREELEY — Heavy Rain — TerraPulse