Alert archive / Arkansas / Mesoscale Discussions in 2015

Mesoscale Discussion 594

May 10, 201525 counties in Arkansas

The Storm Prediction Center issued this mesoscale discussion at May 10, 2015, 5:05 PM CDT for 25 counties in Arkansas. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued
May 10, 2015, 5:05 PM CDT (22:05 UTC)
Expired
May 10, 2015, 7:00 PM CDT
In force
115 min
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 25 counties

Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Cross County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hot Spring County, AR, Independence County, AR, Jackson County, AR, Jefferson County, AR, Lawrence County, AR, Lonoke County, AR, Monroe County, AR, Perry County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Sharp County, AR, White County, AR, Woodruff County, AR

The radar

The Little Rock radar (KLZK), 41 km from the middle of the area, began a volume at 21:57 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 12:00Z, 10.1 hours before the alert went out and 248 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 12:00Z on 2015-05-10Temperature 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 12:00Z on 2015-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 153 square meters per square second.193958Sfc1 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
1931 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
270 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
May 9, 8:46 PM CDTMesoscale DiscussionSPCCalhoun, Clark, Cleveland, Columbia, Dallas, Grant and 6 more59 min
May 10, 2:39 AM CDTMesoscale DiscussionSPCCleburne, Conway, Franklin, Independence, Jackson, Johnson and 4 more66 min
May 10, 6:44 AM CDTMesoscale DiscussionSPCHoward, Little River, Polk, Sevier2 hr
May 10, 8:56 AM CDTMesoscale DiscussionSPCCrawford, Polk, Sebastian2 hr
May 10, 9:28 AM CDTTornado WatchSPCBenton, Boone, Carroll, Crawford, Franklin, Howard and 13 more6 hr
May 10, 10:19 AM CDTTornado WatchSPCHoward, Little River, Sevier13 hr
May 10, 11:25 AM CDTMesoscale DiscussionSPCClark, Cleburne, Conway, Dallas, Faulkner, Franklin and 26 more2 hr
May 10, 12:58 PM CDTTornado WatchSPCCrawford, Franklin, Sebastian10 hr
May 10, 2:42 PM CDTMesoscale DiscussionSPCLittle River2 hr
May 10, 6:15 PM CDTMesoscale DiscussionSPCColumbia, Hempstead, Howard, Lafayette, Little River, Miller and 2 more90 min

Nearby

Mesoscale 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.