Alert archive / Arkansas / Mesoscale Discussions in 2004

Mesoscale Discussion 439

April 22, 20045 counties in Arkansas

The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2004, 10:52 PM CDT for 5 counties in Arkansas. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Apr 22, 2004, 10:52 PM CDT (03:52 UTC)
Expired: Apr 22, 2004, 11:45 PM CDT
In force: 53 min
Issued by: the Storm Prediction Center

Counties Conway County, AR, Pope County, AR, Searcy County, AR, Stone County, AR, Van Buren County, AR

The radar

The Little Rock radar (KLZK), 101 km from the middle of the area, began a volume at 03:52 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 3.9 hours before the alert went out and 168 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: 112 J/kg
Mixed-layer CIN: -140 J/kg
Mixed-layer LCL: 785 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 336 m²/s²
0-3 km storm-relative helicity: 543 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.1

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.

Issued	Product	Office	Counties	Lasted
Apr 22, 7:10 PM CDT	Mesoscale Discussion	SPC	Boone, Franklin, Howard, Johnson, Logan, Madison and 5 more	35 min
Apr 22, 7:50 PM CDT	Tornado Watch	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 10 more	4 hr
Apr 22, 9:50 PM CDT	Severe Thunderstorm Watch	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Conway and 25 more	6 hr
Apr 22, 11:25 PM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Crittenden, Cross, Greene, Mississippi and 1 more	65 min
Apr 22, 11:40 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Craighead, Crittenden, Cross, Greene, Lawrence and 4 more	6 hr
Apr 23, 12:54 AM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Conway and 25 more	96 min
Apr 23, 3:12 AM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Crittenden, Cross, Greene, Lawrence and 5 more	93 min
Apr 23, 7:33 AM CDT	Mesoscale Discussion	SPC	Craighead, Crittenden, Cross, Jackson, Lee, Poinsett and 2 more	87 min
Apr 23, 10:37 AM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Fulton, Izard and 3 more	113 min
Apr 23, 2:10 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Crawford, Sebastian, Washington	6 hr
Apr 23, 6:01 PM CDT	Mesoscale Discussion	SPC	Crawford, Scott, Sebastian	59 min

Nearby

Mesoscale Discussions in Arkansas, 2004 Every mesoscale discussion in 2004

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.