Overview
The warm front that was responsible for the significant tornadoes on the afternoon of the 16th, lifted slightly north on the 17th into far northeast Nebraska. Extreme instability again developed along this boundary given the very warm and humid airmass in place across the region. By late afternoon an isolated supercell thunderstorm developed along this boundary and quickly become severe. This lone supercell produced several tornadoes, three of which were strong, as well as large hail and flash flooding, over Cedar County Nebraska over the next 4 hours. These storms were unique in that they were nearly stationary for a couple of hours, this resulted in short and meandering paths despite fairly long tornado life cycles. |
Southeast Coleridge (source: NWS) | Source: NWS | Source: NWS |
Tornadoes:
Tornado - Coleridge #1
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Tornado - Coleridge #2
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Tornado - Coleridge #3
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Tornado - Laurel #1
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Tornado - Laurel #2
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Tornado - Laurel #3
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The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:
EF0 Weak 65-85 mph |
EF1 Moderate 86-110 mph |
EF2 Significant 111-135 mph |
EF3 Severe 136-165 mph |
EF4 Extreme 166-200 mph |
EF5 Catastrophic 200+ mph |
Photos:
All photos taken by NWS Damage Survey Team
Radar:
Coleridge #1 Radar Animation | Coleridge #2 Radar Animation | Coleridge #3 Radar Animation |
Laurel #1 Radar Animation | Laurel #2 Radar Animation | Laurel #3 Radar Animation |
Storm Reports for Cedar County (6/17/2014)
Location | Time | Type | Comments |
1 SE Fordyce | 00:55 | Hail | One inch hail |
2 S Hartington | 01:02 | Tornado | |
4 NNE Coleridge | 01:12 | Tornado | MULTIVORTEX TORNADO. |
1 NW Coleridge | 01:21 | Tornado | |
Coleridge | 01:26 | Tornado | LARGE WEDGE TORNADO. |
1 NNW Coleridge | 01:30 | Tornado | 2 FARMSTEADS AND ONE GRAINERY DESTROYED. |
Coleridge | 01:33 | Wind Damage | LARGE TREE LIMB BROKE THROUGH WINDOW IN THE HOUSE. FLAG POLE BENT OVER 90 DEGREES. |
5 NW Laurel | 01:52 | Tornado | RAIN WRAPPED. |
5 N Laurel | 02:08 | Tornado | |
4 N Laurel | 02:13 | Tornado | LARGE TORNADO. POSSIBLE MULTIPLE VORTEX. |
5 N Laurel | 02:21 | Tornado | VERY LARGE STATIONARY WEDGE TORNADO. OBSERVED BY STORM DAMAGE SURVEY CREW. |
2 NNE Laurel | 02:31 | Tornado | THIS IS A NEW TORNADO ON THE GROUND. |
3 NE Laurel | 02:35 | Tornado | |
5 NNE Laurel | 03:00 | Tornado | TORNADO STILL ON GROUND. NEARLY STATIONARY. |
2 N Laurel | 03:16 | Tornado | |
6 E Coleridge | 04:14 | Flash Flood | COUNTY ROAD WITH WATER OVER IT EAST OF HWY 15. |
6 S Hartington | 04:14 | Flash Flood | WATER OVER HWY 57. |
Rainfall Map
Environment
Synoptic Overview at 00z (Courtesy of SPC)Figure 1: 250-mb analysis | Figure 2: 300-mb analysis | Figure 3: 500-mb analysis |
Figure 4: 700-mb analysis | Figure 5: 850-mb analysis | Figure 6: 925-mb analysis |
Figure 7: 21z surface map | Figure 8: 00z surface map | Figure 9: 03z surface map |
Figure 10: 06z surface map |
Observed Sounding
Figure 11: KOAX 00z Sounding |
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