Alert archive / Oklahoma / Mesoscale Discussions in 2015

Mesoscale Discussion 145

March 25, 201525 counties in Arkansas; 6 counties in Missouri; 32 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Mar 25, 2015, 7:54 PM CDT for 25 counties in Arkansas; 6 counties in Missouri; 32 counties in Oklahoma. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Mar 25, 2015, 7:54 PM CDT (00:54 UTC)
Expired
Mar 25, 2015, 9:00 PM CDT
In force
66 min
Issued by
the Storm Prediction Center
All 63 counties

Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Cleburne County, AR, Conway County, AR, Crawford County, AR, Faulkner County, AR, Franklin County, AR, Fulton County, AR, Independence County, AR, Izard County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Pope County, AR, Searcy County, AR, Sebastian County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, White County, AR, Barry County, MO, Howell County, MO, McDonald County, MO, Ozark County, MO, Stone County, MO, Taney County, MO, Adair County, OK, Canadian County, OK, Cherokee County, OK, Cleveland County, OK, Creek County, OK, Delaware County, OK, Garvin County, OK, Grady County, OK, Haskell County, OK, Hughes County, OK, Kingfisher County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Logan County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Pawnee County, OK, Payne County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 42 km from the middle of the area, began a volume at 00:56 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

Norman, OK (KOUN), launched 00:00Z, 0.9 hours before the alert went out and 196 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 2015-03-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1928 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 2015-03-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 171 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
1928 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
1591 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
171 m²/s²
0-3 km storm-relative helicity
294 m²/s²
Significant tornado parameter
1.1
Supercell composite
16.1

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
Mar 25, 7:02 PM CDTSevere Thunderstorm WatchSPCClay, Craighead, Greene, Lawrence, Mississippi, Randolph7 hr
Mar 25, 9:21 PM CDTSevere Thunderstorm WatchSPCBaxter, Boone, Cleburne, Conway, Crawford, Faulkner and 33 more8 hr
Mar 25, 9:23 PM CDTMesoscale DiscussionSPCClay, Greene97 min
Mar 25, 11:39 PM CDTMesoscale DiscussionSPCCleburne, Conway, Faulkner, Franklin, Garland, Independence and 17 more96 min
Mar 26, 1:35 AM CDTMesoscale DiscussionSPCClay, Craighead, Greene25 min
Mar 26, 2:17 AM CDTMesoscale DiscussionSPCClark, Garland, Grant, Hempstead, Hot Spring, Howard and 8 more58 min

Nearby

Mesoscale Discussions in Oklahoma, 2015Mesoscale Discussions in Arkansas, 2015Mesoscale Discussions in Missouri, 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.