Alert archive / Arkansas / Mesoscale Discussions in 2003

Mesoscale Discussion 1894

July 19, 200310 counties in Arkansas

The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2003, 3:36 AM CDT for 10 counties in Arkansas. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Jul 19, 2003, 3:36 AM CDT (08:36 UTC)
Expired: Jul 19, 2003, 5:00 AM CDT
In force: 84 min
Issued by: the Storm Prediction Center

Counties Arkansas County, AR, Faulkner County, AR, Grant County, AR, Jefferson County, AR, Lincoln County, AR, Lonoke County, AR, Monroe County, AR, Phillips County, AR, Prairie County, AR, Pulaski County, AR

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 8.6 hours before the alert went out and 179 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: 2986 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1631 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 8.2

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 18, 7:08 PM CDT	Mesoscale Discussion	SPC	Baxter, Boone, Carroll, Fulton, Marion	97 min
Jul 18, 7:55 PM CDT	Severe Thunderstorm Watch	SPC	Baxter, Clay, Cleburne, Craighead, Crittenden, Cross and 16 more	6 hr
Jul 18, 11:13 PM CDT	Mesoscale Discussion	SPC	Baxter, Clay, Cleburne, Craighead, Crittenden, Cross and 16 more	92 min
Jul 19, 1:27 AM CDT	Mesoscale Discussion	SPC	Baxter, Boone, Cleburne, Conway, Faulkner, Fulton and 13 more	63 min
Jul 19, 1:40 AM CDT	Severe Thunderstorm Watch	SPC	Baxter, Boone, Cleburne, Conway, Faulkner, Fulton and 18 more	5 hr
Jul 19, 5:41 AM CDT	Mesoscale Discussion	SPC	Arkansas, Cleburne, Conway, Faulkner, Fulton, Independence and 16 more	94 min

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.