Alert archive / Arkansas / Mesoscale Discussions in 2004

Mesoscale Discussion 1700

July 15, 20044 states

The Storm Prediction Center issued this mesoscale discussion at Jul 15, 2004, 8:01 PM CDT for 4 states. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued
Jul 15, 2004, 8:01 PM CDT (01:01 UTC)
Expired
Jul 15, 2004, 10:00 PM CDT
In force
119 min
Issued by
the Storm Prediction Center
All 54 counties

Benton County, AR, Bradley County, AR, Calhoun County, AR, Carroll County, AR, Clark County, AR, Cleveland County, AR, Columbia County, AR, Conway County, AR, Crawford County, AR, Dallas County, AR, Faulkner County, AR, Franklin County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Johnson County, AR, Lafayette County, AR, Little River County, AR, Logan County, AR, Madison County, AR, Montgomery County, AR, Nevada County, AR, Newton County, AR, Ouachita 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, Union County, AR, Van Buren County, AR, Washington County, AR, Yell County, AR, Caldwell Parish, LA, Claiborne Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Ouachita Parish, LA, Union Parish, LA, Barry County, MO, Jasper County, MO, McDonald County, MO, Newton County, MO, Adair County, OK, LeFlore County, OK, McCurtain County, OK, Sequoyah County, OK

The radar

The Little Rock radar (KLZK), 113 km from the middle of the area, began a volume at 01:02 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, 1.0 hours before the alert went out and 320 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 00:00Z on 2004-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2006 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2004-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
2006 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
1328 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
50 m²/s²
Significant tornado parameter
0.4
Supercell composite
3.5

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
Jul 15, 7:34 PM CDTMesoscale DiscussionSPCAshley, Chicot, Drew86 min
Jul 16, 8:35 AM CDTSevere Thunderstorm WatchSPCArkansas, Baxter, Boone, Calhoun, Carroll, Clark and 43 more4 hr
Jul 16, 12:23 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Chicot, Desha, Drew, Jefferson and 4 more97 min
Jul 16, 12:45 PM CDTSevere Thunderstorm WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 12 more6 hr
Jul 16, 3:03 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Chicot, Cleveland, Desha and 5 more117 min
Jul 16, 3:37 PM CDTMesoscale DiscussionSPCArkansas, Bradley, Calhoun, Clark, Cleveland, Conway and 32 more113 min
Jul 16, 6:44 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 6 more61 min
Jul 16, 11:42 AM CDTMesoscale DiscussionSPCWashington3 hr
Jul 15, 11:34 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Bates, Buchanan, Caldwell, Carroll and 25 more86 min
Jul 16, 3:33 AM CDTMesoscale DiscussionSPCAndrew, Barton, Bates, Benton, Buchanan, Cass and 19 more117 min
Jul 16, 3:45 AM CDTSevere Thunderstorm WatchSPCBarry, Barton, Bates, Benton, Camden, Cass and 27 more5 hr
Jul 16, 6:28 AM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Camden, Cedar, Christian and 18 more92 min
Jul 16, 12:10 PM CDTSevere Thunderstorm WatchSPCScotland5 hr
Jul 16, 2:45 PM CDTMesoscale DiscussionSPCScotland90 min

Nearby

Mesoscale Discussions in Arkansas, 2004Mesoscale Discussions in Louisiana, 2004Mesoscale Discussions in Missouri, 2004Every 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.