Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 641, NWS Norman, OK

November 5, 2015Bryan County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Nov 5, 2015, 6:15 PM CST for Bryan County, Oklahoma. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Nov 5, 2015, 6:15 PM CST (00:15 UTC)
Expired: Nov 5, 2015, 7:00 PM CST
In force: 45 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Bryan County, OK

The radar

The Norman radar (KTLX), 179 km from the middle of the area, began a volume at 00:19 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Nov 5, 12:06 PM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.3 hours before the alert went out and 158 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: 1857 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 749 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 383 m²/s²
0-3 km storm-relative helicity: 370 m²/s²
Significant tornado parameter: 4.3
Supercell composite: 36.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Nov 5, 3:01 PM CST, 3 hours 14 minutes earlier.

Area forecast discussion, Nov 5, 3:01 PM CST, 3 hours 14 minutes before

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Hazardous weather outlook, Nov 5, 3:35 PM CST, 2 hours 40 minutes before

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In the hours before

Local storm report, Nov 5, 3:00 PM CST, 3 hours 15 minutes before

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Special weather statement, Nov 5, 3:18 PM CST, 2 hours 57 minutes before

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Special weather statement, Nov 5, 3:45 PM CST, 2 hours 30 minutes before

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Special weather statement, Nov 5, 4:17 PM CST, 1 hour 58 minutes before

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Special weather statement, Nov 5, 4:19 PM CST, 1 hour 56 minutes before

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Local storm report, Nov 5, 4:26 PM CST, 1 hour 49 minutes before

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The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 6, 3:14 PM CST	Frost Advisory	OUN	Alfalfa, Ellis, Grant, Harper, Kay, Woods and 1 more	17 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2015 Every severe thunderstorm warning in 2015

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.