Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 894

May 9, 20035 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 9, 2003, 9:41 PM CDT for 5 counties in Oklahoma. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: May 9, 2003, 9:41 PM CDT (02:41 UTC)
Expired: May 9, 2003, 10:45 PM CDT
In force: 64 min
Issued by: the Storm Prediction Center

Counties Blaine County, OK, Canadian County, OK, Kingfisher County, OK, Logan County, OK, Oklahoma County, OK

The radar

The Norman radar (KTLX), 49 km from the middle of the area, began a volume at 02:45 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, 2.7 hours before the alert went out and 53 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: 2823 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 1182 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.1

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
May 9, 7:12 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 20 more	63 min
May 9, 7:45 PM CDT	Tornado Watch	SPC	Alfalfa, Beckham, Blaine, Canadian, Custer, Dewey and 9 more	5 hr
May 9, 7:47 PM CDT	Mesoscale Discussion	SPC	Craig, Mayes, Nowata, Osage, Ottawa, Pawnee and 2 more	88 min
May 9, 8:24 PM CDT	Mesoscale Discussion	SPC	Blaine, Canadian, Custer, Garfield, Kingfisher, Logan and 2 more	66 min
May 9, 10:51 PM CDT	Mesoscale Discussion	SPC	Cherokee, Craig, Creek, Delaware, Lincoln, Mayes and 11 more	54 min
May 9, 11:10 PM CDT	Tornado Watch	SPC	Cherokee, Craig, Creek, Delaware, Lincoln, Mayes and 12 more	6 hr
May 10, 1:22 AM CDT	Mesoscale Discussion	SPC	Cherokee, Craig, Creek, Delaware, Lincoln, Mayes and 12 more	83 min
May 10, 9:16 AM CDT	Mesoscale Discussion	SPC	Cleveland, Craig, Creek, Hughes, Lincoln, McClain and 12 more	3 hr
May 10, 10:54 AM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Craig, Creek, Delaware, Mayes and 6 more	66 min
May 10, 11:55 AM CDT	Tornado Watch	SPC	Adair, Atoka, Bryan, Carter, Cherokee, Choctaw and 30 more	7 hr
May 10, 1:59 PM CDT	Mesoscale Discussion	SPC	Adair, Atoka, Bryan, Carter, Cherokee, Choctaw and 29 more	2 hr

Nearby

Mesoscale Discussions in Oklahoma, 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; radar from the NEXRAD Level II archive.