Alert archive / Arkansas / Mesoscale Discussions in 2005

Mesoscale Discussion 991

May 24, 200531 counties in Arkansas; 8 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 24, 2005, 3:42 PM CDT for 31 counties in Arkansas; 8 counties in Oklahoma. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
May 24, 2005, 3:42 PM CDT (20:42 UTC)
Expired
May 24, 2005, 5:15 PM CDT
In force
93 min
Issued by
the Storm Prediction Center
All 39 counties

Clark County, AR, Cleveland County, AR, Conway County, AR, Crawford County, AR, Dallas County, AR, Faulkner County, AR, Franklin County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Howard County, AR, Jefferson County, AR, Johnson County, AR, Lincoln County, AR, Logan County, AR, Madison County, AR, Montgomery County, AR, Newton County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sevier County, AR, Van Buren County, AR, Washington County, AR, Yell County, AR, Adair County, OK, Cherokee County, OK, Haskell County, OK, LeFlore County, OK, McCurtain County, OK, Muskogee County, OK, Sequoyah County, OK, Wagoner County, OK

The radar

The Western Arkansas radar (KSRX), 79 km from the middle of the area, began a volume at 20:43 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, 8.7 hours before the alert went out and 240 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 2005-05-24Temperature 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 2005-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 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
2363 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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
May 24, 2:35 AM CDTSevere Thunderstorm WatchSPCBenton, Crawford, Franklin, Logan, Madison, Montgomery and 4 more7 hr
May 24, 5:40 AM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Franklin, Logan, Madison and 5 more95 min
May 24, 9:13 AM CDTMesoscale DiscussionSPCBenton32 min
May 24, 10:30 AM CDTMesoscale DiscussionSPCArkansas, Benton, Boone, Calhoun, Carroll, Clark and 37 more90 min
May 24, 10:55 AM CDTSevere Thunderstorm WatchSPCBenton, Boone, Calhoun, Carroll, Clark, Cleveland and 36 more8 hr
May 24, 12:43 PM CDTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Chicot, Cleveland, Desha and 3 more2 hr
May 24, 1:21 PM CDTMesoscale DiscussionSPCBenton, Boone, Carroll, Clark, Cleveland, Conway and 31 more114 min
May 24, 4:50 PM CDTSevere Thunderstorm WatchSPCBradley, Calhoun, Clark, Columbia, Crawford, Dallas and 23 more7 hr
May 23, 7:30 PM CDTMesoscale DiscussionSPCCimarron, Texas2 hr
May 23, 10:55 PM CDTSevere Thunderstorm WatchSPCAlfalfa, Garfield, Grant, Harper, Woods6 hr
May 24, 1:14 AM CDTMesoscale DiscussionSPCAlfalfa, Creek, Garfield, Grant, Harper, Kay and 18 more91 min

Nearby

Mesoscale Discussions in Arkansas, 2005Mesoscale Discussions in Oklahoma, 2005Every mesoscale discussion in 2005

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.