Alert archive / Oklahoma / Mesoscale Discussions in 2004

Mesoscale Discussion 1480

July 3, 2004Polk County, Scott County, Arkansas; 9 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jul 3, 2004, 3:19 AM CDT for Polk County, Scott County, Arkansas; 9 counties in Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 3, 2004, 3:19 AM CDT (08:19 UTC)
Expired
Jul 3, 2004, 5:45 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center

Counties Polk County, AR, Scott County, AR, Haskell County, OK, Latimer County, OK, LeFlore County, OK, McCurtain County, OK, McIntosh County, OK, Muskogee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pushmataha County, OK

The radar

The Western Arkansas radar (KSRX), 90 km from the middle of the area, began a volume at 08:22 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

Norman, OK (KOUN), launched 00:00Z, 8.3 hours before the alert went out and 194 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, Norman, OK at 00:00Z on 2004-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3602 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, Norman, OK at 00:00Z on 2004-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 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
3602 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1156 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
153 m²/s²
Significant tornado parameter
1.1
Supercell composite
9.0

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 2, 8:26 PM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Franklin, Madison, Washington94 min
Jul 2, 10:39 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 18 more96 min
Jul 2, 7:17 PM CDTMesoscale DiscussionSPCComanche, Cotton, Greer, Harmon, Jackson, Kiowa and 1 more88 min
Jul 2, 7:51 PM CDTMesoscale DiscussionSPCCimarron, Texas84 min
Jul 2, 9:19 PM CDTMesoscale DiscussionSPCBeaver, Cimarron, Ellis, Harper, Roger Mills, Texas56 min
Jul 3, 1:01 AM CDTMesoscale DiscussionSPCAtoka, Caddo, Canadian, Carter, Cleveland, Coal and 35 more89 min
Jul 3, 1:15 AM CDTSevere Thunderstorm WatchSPCCaddo, Carter, Comanche, Cotton, Garvin, Grady and 10 more6 hr
Jul 3, 3:32 AM CDTMesoscale DiscussionSPCCarter, Cotton, Jefferson, Love, Tillman118 min
Jul 3, 6:15 AM CDTMesoscale DiscussionSPCBryan, Choctaw, Love, Marshall60 min

Nearby

Mesoscale Discussions in Oklahoma, 2004Mesoscale Discussions in Arkansas, 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.