Back-to-back powerful Pacific storm systems to impact the Pacific Northwest and northern California through the end of this week with heavy rain, flooding, strong winds, and higher elevation mountain snow. A strong, long-duration atmospheric river will accompany the Pacific storms, bringing excessive rainfall and flash flooding to southwest Oregon and northwest California through the week. Read More >
Overview
A large, high-precipitation supercell moved south across northeast Kansas over a five hour period. The supercell produced four EF-1 tornadoes, as well as several areas of straight-line winds in excess of 80 mph from the rear flank downdraft of the supercell:Tornadoes:
Tornado 1 - Nebraska/Kansas Border
Track Map |
Tornado 2 - Marysville
Track Map |
Tornado 3 - 1 Mile E of Marysville
Track Map |
Tornado 4 - 1 Mile N of Blue Rapids
Track Map |
Tornado 5 - 3 Miles E of Olsburg
Track Map |
Tornado 6 - Manhattan
Track Map |
Tornado 7 - 7 miles SE of Manhattan
Track Map |
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 & Video
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Supercell as it approached Marysville. (Charles Peek) |
Brief tornado on the east side of Marysville, shortly after 6pm. | Supercell as it approached Blue Rapids. (Bryan Baerg) |
Supercell as it approached Manhattan. (Austin Jones) |
EF-1 damage to an outbuilding along the KS/NE border. (NWS Damage Survey) |
EF-1 damage in Marysville. (NWS Damage Survey) |
Warehouse wall that collapsed onto a police car in Marysville. (Charles Peek) |
Damage to another warehouse in Marysville. (Freddy McKinney) |
EF-1 damage on the southeast side of Tuttle Creek Lake. (NWS Damage Survey) |
Overhead view of the damage in Manhattan. (Dawson Wagner) |
EF-2 damage in Manhattan. (NWS Damage Survey) |
EF-2 damage in Manhattan. (NWS Damage Survey) |
Radar
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Radar at 5:45 PM as the tornado neared the Kansas/Nebraska border. | Radar at 6:05 PM with likely two tornadoes occurring near Marysville. | Radar at 6:26 with the tornado just north of Blue Rapids. |
Radar at 7:11 with the tornado southeast of Olsburg. | Radar at 7:21 around the time of the brief EF-2 tornado in Manhattan. | Radar at 7:34 near the time of the brief tornado in open country southeast of Manhattan. |
Environment
Soundings20z (3pm CDT) Topeka sounding | 0z (7pm CDT) Topeka sounding |
Storm Prediction Center Outlooks
11:30 AM SPC Outlook - Overall Categories | SPC Outlook - Tornado | SPC Outlook - Wind | SPC Outlook - Hail |
Additional environmental data.
250 mb pattern valid at 7 pm | 500 mb pattern valid at 7 pm | 850 mb pattern valid at 7 pm |
Surface winds and mean sea level pressure valid at 7 pm | Surface-based CAPE valid at 7 pm | Effective shear valid at 7 pm |
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