Alert archive / Oklahoma / Mesoscale Discussions in 2015

Mesoscale Discussion 1963

November 17, 201515 counties in Arkansas; 20 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Nov 17, 2015, 4:35 AM CST for 15 counties in Arkansas; 20 counties in Oklahoma. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued
Nov 17, 2015, 4:35 AM CST (10:35 UTC)
Expired
Nov 17, 2015, 6:30 AM CST
In force
115 min
Issued by
the Storm Prediction Center
All 35 counties

Benton County, AR, Crawford County, AR, Franklin County, AR, Howard County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Montgomery County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Washington County, AR, Yell County, AR, Adair County, OK, Atoka County, OK, Cherokee County, OK, Choctaw County, OK, Craig County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Mayes County, OK, McCurtain County, OK, McIntosh County, OK, Muskogee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pushmataha County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Western Arkansas radar (KSRX), 51 km from the middle of the area, began a volume at 10:35 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 10.6 hours before the alert went out and 211 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, Springfield, MO at 00:00Z on 2015-11-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Springfield, MO at 00:00Z on 2015-11-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 393 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
585 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
393 m²/s²
0-3 km storm-relative helicity
358 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 17, 4:48 AM CSTTornado WatchSPCHoward, Little River, Miller, Sevier4 hr
Nov 17, 6:27 AM CSTSevere Thunderstorm WatchSPCBaxter, Benton, Boone, Carroll, Clark, Conway and 21 more6 hr
Nov 17, 8:24 AM CSTMesoscale DiscussionSPCColumbia, Lafayette66 min
Nov 17, 8:55 AM CSTTornado WatchSPCColumbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more7 hr
Nov 17, 9:59 AM CSTMesoscale DiscussionSPCArkansas, Ashley, Baxter, Boone, Bradley, Calhoun and 58 more2 hr
Nov 17, 11:07 AM CSTTornado WatchSPCArkansas, Bradley, Calhoun, Clark, Cleburne, Cleveland and 21 more6 hr
Nov 17, 12:19 PM CSTMesoscale DiscussionSPCAshley, Chicot116 min
Nov 17, 12:36 PM CSTTornado WatchSPCAshley, Chicot7 hr
Nov 17, 1:35 PM CSTMesoscale DiscussionSPCArkansas, Cleburne, Cleveland, Craighead, Crittenden, Cross and 25 more115 min
Nov 17, 3:15 PM CSTTornado WatchSPCCraighead, Crittenden, Cross, Lee, Mississippi, Phillips and 2 more4 hr
Nov 17, 3:19 PM CSTMesoscale DiscussionSPCClay, Fulton, Greene, Izard, Lawrence, Randolph and 1 more116 min
Nov 17, 5:36 PM CSTMesoscale DiscussionSPCCrittenden, Cross, Lee, Monroe, Phillips, Poinsett and 1 more84 min
Nov 16, 8:07 PM CSTMesoscale DiscussionSPCBeaver, Beckham, Ellis, Greer, Harmon, Harper and 3 more83 min
Nov 16, 8:17 PM CSTTornado WatchSPCAlfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 32 more7 hr
Nov 16, 10:19 PM CSTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Comanche, Cotton and 17 more86 min
Nov 17, 12:58 AM CSTMesoscale DiscussionSPCAtoka, Bryan, Canadian, Carter, Choctaw, Cleveland and 37 more2 hr
Nov 17, 1:48 AM CSTSevere Thunderstorm WatchSPCAdair, Atoka, Bryan, Carter, Cherokee, Choctaw and 30 more5 hr
Nov 17, 3:43 PM CSTMesoscale DiscussionSPCCimarron4 hr

Nearby

Mesoscale Discussions in Oklahoma, 2015Mesoscale Discussions in Arkansas, 2015Every mesoscale discussion in 2015

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.