A squall line with severe storms will race through NWA and the River Valley after 6 PM. Damaging winds will be possible along the leading edge.

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Skies will turn stormy over Arkansas and Oklahoma Tuesday evening as a cold front drops south. A Level 4 severe risk is in effect for eastern Oklahoma and parts of the River Valley.

WEATHER SETUP

A line of storms will form just northwest of Arkansas and then press south, impacting NWA around 7-8 PM and the River Valley around 8-10 PM. These will likely have severe thunderstorm warnings.

WHAT TO WATCH FOR

1) Damaging winds: This is our main risk. Storms will be quickly moving south ahead of a cold front. Because of their fast movement, they will easily be able to pack 65-70+ MPH wind gusts.

2) Pockets of hail: In the strongest embedded cells along the line, there may be some severe (1"+) hail

3) Tornadoes: The threat will remain isolated. There may be a small rain-wrapped tornado along the leading edge, especially just outside the apex of any bow that forms.

4) Shelf Cloud: This arcus cloud will form in the northwestern sky along the edge of the squall line.

COUNTY-BY-COUNTY

*Timing may vary by an hour or so, depending on how quickly the storms propel themselves southbound*

---ARKANSAS---

BENTON: 6-8 PM

CARROLL: 7-8 PM

CRAWFORD: 8-9 PM

FRANKLIN: 8-9 PM

JOHNSON: 9-10 PM

LOGAN: 9-10 PM (very high wind risk)

MADISON: 7-8 PM

SEBASTIAN: 8-9 PM (very high wind risk)

SCOTT: 9-10 PM (very high wind risk)

WASHINGTON: 7-8 PM (very high wind risk)

---OKLAHOMA---

LE FLORE: 8-10 PM (very high wind risk)

SEQUOYAH: 7-9 PM (very high wind risk)

THREAT MAPS

Damaging Winds: High - Very High

The leading edge of the storms will have the wind risk. As the shelf cloud gets closer, the winds will pick up quickly. The hash marks you see indicate a high chance for storms to have 70-75+ MPH wind gusts especially in bowing segments.

Tornado Risk: Low - Medium

With a squall line, there will the potential for a quick rain-wrapped tornado, especially near the apex of a bowing segment.

Hail Risk: Medium - High

The strongest cells within the line will have a quick hail risk. Because of the hail risk, frequent lightning should develop as well, and will be quite visible as the sun sets.