Alert archive / Texas / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 334, NWS Norman, OK

June 11, 1998Clay County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Jun 11, 1998, 12:48 AM CDT for Clay County, Texas. It was in force for 27 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 11, 1998, 12:48 AM CDT (05:48 UTC)
Expired: Jun 11, 1998, 1:15 AM CDT
In force: 27 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Clay County, TX

What was reported inside it

Time	Report	Where	Remark
Jun 11, 1:00 AM CDT	Thunderstorm Wind 57	Byers, TX	Numerous large tree limbs were blown down by winds estimated at 65 mph.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 10, 10:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 5.8 hours before the alert went out and 176 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: 376 J/kg
Mixed-layer CIN: -158 J/kg
Mixed-layer LCL: 1261 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Jun 10, 9:45 PM CDT, 3 hours 3 minutes earlier.

Area forecast discussion, Jun 10, 9:45 PM CDT, 3 hours 3 minutes before

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In the hours before

Local storm report, Jun 10, 7:44 PM CDT, 5 hours 4 minutes before

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Local storm report, Jun 10, 8:28 PM CDT, 4 hours 20 minutes before

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Local storm report, Jun 10, 8:28 PM CDT, 4 hours 20 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
Jun 10, 7:20 PM CDT	Flash Flood Warning	OUN	Grant	3 hr
Jun 11, 1:04 AM CDT	Severe Thunderstorm Warning	OUN	Jefferson	26 min
Jun 11, 1:41 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain	19 min
Jun 11, 2:36 AM CDT	Severe Thunderstorm Warning	OUN	Johnston, Pontotoc	34 min
Jun 10, 9:57 PM CDT	Severe Thunderstorm Warning	OUN	Knox	48 min

Nearby

Severe Thunderstorm Warnings in Texas, 1998 Every severe thunderstorm warning in 1998

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.