Alert archive / Oklahoma / Mesoscale Discussions in 2004

Mesoscale Discussion 441

April 22, 20049 counties in Oklahoma; 6 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2004, 11:47 PM CDT for 9 counties in Oklahoma; 6 counties in Texas. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Apr 22, 2004, 11:47 PM CDT (04:47 UTC)
Expired: Apr 23, 2004, 12:45 AM CDT
In force: 58 min
Issued by: the Storm Prediction Center

Counties Beaver County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Harper County, OK, Major County, OK, Roger Mills County, OK, Texas County, OK, Woodward County, OK, Hansford County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Ochiltree County, TX, Roberts County, TX

The radar

The Amarillo radar (KAMA), 150 km from the middle of the area, began a volume at 04:49 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 4.8 hours before the alert went out and 149 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: 9 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1977 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 401 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

Issued	Product	Office	Counties	Lasted
Apr 22, 7:10 PM CDT	Mesoscale Discussion	SPC	Cherokee, Craig, Delaware, Hughes, LeFlore, McCurtain and 10 more	35 min
Apr 22, 7:50 PM CDT	Tornado Watch	SPC	Adair, Cherokee, Delaware, Haskell, McIntosh, Muskogee and 2 more	4 hr
Apr 22, 8:00 PM CDT	Mesoscale Discussion	SPC	Love	60 min
Apr 22, 9:50 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Cherokee, Delaware, Haskell, Latimer, LeFlore and 5 more	6 hr
Apr 23, 12:54 AM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Delaware, Haskell, Latimer, LeFlore and 5 more	96 min
Apr 23, 10:10 AM CDT	Mesoscale Discussion	SPC	Beaver, Beckham, Blaine, Custer, Dewey, Ellis and 11 more	3 hr
Apr 23, 10:37 AM CDT	Mesoscale Discussion	SPC	Ottawa	113 min
Apr 23, 12:15 PM CDT	Tornado Watch	SPC	Carter, Cotton, Jefferson, Tillman	6 hr
Apr 23, 1:46 PM CDT	Mesoscale Discussion	SPC	Adair, Caddo, Canadian, Carter, Cherokee, Cleveland and 29 more	119 min
Apr 23, 2:10 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Blaine, Caddo, Canadian, Cherokee, Cleveland and 30 more	6 hr
Apr 23, 3:05 PM CDT	Mesoscale Discussion	SPC	Cotton, Garvin, Murray, Pontotoc, Stephens	85 min
Apr 23, 3:05 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Craig, Garfield, Grant, Kay, Major and 5 more	5 hr
Apr 23, 4:40 PM CDT	Mesoscale Discussion	SPC	Carter, Jefferson	65 min
Apr 23, 5:30 PM CDT	Severe Thunderstorm Watch	SPC	Carter, Cotton, Jefferson, Johnston, Love, Marshall and 3 more	7 hr
Apr 23, 6:01 PM CDT	Mesoscale Discussion	SPC	Creek, Haskell, Latimer, LeFlore, Lincoln, Nowata and 9 more	59 min
Apr 22, 9:06 PM CDT	Mesoscale Discussion	SPC	Montague	24 min
Apr 23, 2:41 PM CDT	Mesoscale Discussion	SPC	Baylor, Callahan, Coke, Coleman, Concho, Fisher and 18 more	2 hr

Nearby

Mesoscale Discussions in Oklahoma, 2004 Mesoscale Discussions in Texas, 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.