Alert archive / Oklahoma / Mesoscale Discussions in 2017

Mesoscale Discussion 529

April 20, 201726 counties in Oklahoma; 8 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 20, 2017, 5:40 PM CDT for 26 counties in Oklahoma; 8 counties in Texas. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Apr 20, 2017, 5:40 PM CDT (22:40 UTC)
Expired: Apr 20, 2017, 7:15 PM CDT
In force: 95 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

All 34 counties

Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Hughes County, OK, Jackson County, OK, Jefferson County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, McClain County, OK, Murray County, OK, Okfuskee County, OK, Oklahoma County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Foard County, TX, Hardeman County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 82 km from the middle of the area, began a volume at 22:41 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 152Apr 20, 9:30 PM CDT

The text

As transmitted.

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Nearby

Mesoscale Discussions in Oklahoma, 2017 Mesoscale Discussions in Texas, 2017 Every mesoscale discussion in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.