Alert archive / Arkansas / Mesoscale Discussions in 2003

Mesoscale Discussion 1822

July 13, 200310 counties in Arkansas

The Storm Prediction Center issued this mesoscale discussion at Jul 13, 2003, 6:54 PM CDT for 10 counties in Arkansas. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Jul 13, 2003, 6:54 PM CDT (23:54 UTC)
Expired: Jul 13, 2003, 8:30 PM CDT
In force: 96 min
Issued by: the Storm Prediction Center

Counties Crittenden County, AR, Cross County, AR, Jackson County, AR, Lee County, AR, Monroe County, AR, Poinsett County, AR, Prairie County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 11.9 hours before the alert went out and 109 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2438 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1048 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

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.

Issued	Product	Office	Counties	Lasted
Jul 13, 11:30 AM CDT	Mesoscale Discussion	SPC	Arkansas, Bradley, Calhoun, Cleveland, Columbia, Crittenden and 11 more	2 hr
Jul 13, 11:55 AM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 11 more	6 hr
Jul 13, 1:30 PM CDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Crawford, Franklin, Johnson and 6 more	60 min
Jul 13, 3:53 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Chicot, Crittenden, Desha, Lee and 3 more	67 min
Jul 13, 4:44 PM CDT	Mesoscale Discussion	SPC	Baxter, Boone, Clay, Cleburne, Craighead, Fulton and 12 more	61 min
Jul 13, 5:10 PM CDT	Severe Thunderstorm Watch	SPC	Baxter, Boone, Carroll, Cleburne, Craighead, Crittenden and 18 more	5 hr
Jul 13, 5:55 PM CDT	Severe Thunderstorm Watch	SPC	Chicot	4 hr

Nearby

Mesoscale Discussions in Arkansas, 2003 Every mesoscale discussion in 2003

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.