Alert archive / Texas / Special Weather Statements in 2018

Special Weather Statement, NWS Norman, OK

August 8, 2018Archer County, Texas

NWS Norman, OK issued this special weather statement at Aug 8, 2018, 7:53 PM CDT for Archer County, Texas. It was in force for 7 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 8, 2018, 7:53 PM CDT (00:53 UTC)
Expired: Aug 8, 2018, 8:00 PM CDT
In force: 7 min
Issued by: NWS Norman, OK

County Archer County, TX

The radar

The Altus AFB radar (KFDR), 102 km from the middle of the area, began a volume at 00:54 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, 0.9 hours before the alert went out and 329 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: 61 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 2567 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 8, 6:05 PM CDT, 1 hour 48 minutes earlier.

Area forecast discussion, Aug 8, 6:05 PM CDT, 1 hour 48 minutes before

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Hazardous weather outlook, Aug 8, 11:45 AM CDT, 8 hours 8 minutes before

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In the hours before

Local storm report, Aug 8, 2:54 PM CDT, 4 hours 59 minutes before

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Local storm report, Aug 8, 2:56 PM CDT, 4 hours 57 minutes before

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Special weather statement, Aug 8, 7:35 PM CDT, 18 minutes before

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Special weather statement, Aug 8, 7:53 PM CDT, 0 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
Aug 9, 4:59 PM CDT	Special Weather Statement	OUN	Noble	46 min
Aug 9, 6:20 PM CDT	Special Weather Statement	OUN	Alfalfa	25 min
Aug 9, 6:52 PM CDT	Special Weather Statement	OUN	Grant	38 min
Aug 8, 7:35 PM CDT	Special Weather Statement	OUN	Archer, Clay	25 min
Aug 8, 8:01 PM CDT	Special Weather Statement	OUN	Archer	44 min
Aug 8, 8:06 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Clay	39 min
Aug 8, 8:38 PM CDT	Special Weather Statement	OUN	Baylor	37 min

Nearby

Special Weather Statements in Texas, 2018 Every special weather statement in 2018

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.