Alert archive / Oklahoma / Mesoscale Discussions in 2017

Mesoscale Discussion 510

April 16, 201713 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 16, 2017, 8:54 PM CDT for 13 counties in Oklahoma. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued
Apr 16, 2017, 8:54 PM CDT (01:54 UTC)
Expired
Apr 16, 2017, 10:30 PM CDT
In force
96 min
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Craig County, OK, Delaware County, OK, Kay County, OK, Mayes County, OK, Noble County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Rogers County, OK, Tulsa County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 103 km from the middle of the area, began a volume at 01:53 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 nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 1.9 hours before the alert went out and 166 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Norman, OK at 00:00Z on 2017-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1796 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2017-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1796 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
690 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
110 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.1

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 16, 7:01 PM CDTMesoscale DiscussionSPCBeckham, Blaine, Caddo, Comanche, Cotton, Custer and 11 more59 min
Apr 16, 9:33 PM CDTMesoscale DiscussionSPCBeckham, Custer, Dewey, Ellis, Greer, Harmon and 7 more57 min

Nearby

Mesoscale Discussions in Oklahoma, 2017Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.