Alert archive / Texas / Special Weather Statements in 2017

Special Weather Statement, NWS Houston/Galveston, TX

August 6, 2017Austin County, Texas

NWS Houston/Galveston, TX issued this special weather statement at Aug 6, 2017, 6:00 PM CDT for Austin County, Texas. It was in force for 30 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 6, 2017, 6:00 PM CDT (23:00 UTC)
Expired: Aug 6, 2017, 6:30 PM CDT
In force: 30 min
Issued by: NWS Houston/Galveston, TX

County Austin County, TX

The radar

The Ft Hood radar (KGRK), 125 km from the middle of the area, began a volume at 23:00 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 11.0 hours before the alert went out and 309 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: 2356 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 756 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 84 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 Houston/Galveston, TX wrote its last area forecast discussion before this special weather statement went out at Aug 6, 3:39 PM CDT, 2 hours 21 minutes earlier.

Area forecast discussion, Aug 6, 3:39 PM CDT, 2 hours 21 minutes before

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Hazardous weather outlook, Aug 6, 6:17 AM CDT, 11 hours 43 minutes before

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In the hours before

Special weather statement, Aug 6, 3:45 PM CDT, 2 hours 15 minutes before

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Special weather statement, Aug 6, 4:18 PM CDT, 1 hour 42 minutes before

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Special weather statement, Aug 6, 4:59 PM CDT, 1 hour 1 minute before

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Special weather statement, Aug 6, 5:02 PM CDT, 58 minutes before

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Local storm report, Aug 6, 5:18 PM CDT, 42 minutes before

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Special weather statement, Aug 6, 6:00 PM CDT, 0 minutes before

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The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 6, 1:08 PM CDT	Special Marine Warning	HGX		37 min
Aug 6, 2:12 PM CDT	Special Weather Statement	HGX	Liberty	33 min
Aug 6, 2:15 PM CDT	Special Marine Warning	HGX		45 min
Aug 6, 2:27 PM CDT	Special Weather Statement	HGX	San Jacinto	33 min
Aug 6, 2:56 PM CDT	Special Weather Statement	HGX	Liberty	34 min
Aug 6, 3:29 PM CDT	Severe Thunderstorm Warning	HGX	Liberty, Polk, San Jacinto	31 min
Aug 6, 3:45 PM CDT	Special Weather Statement	HGX	Harris	30 min
Aug 6, 4:18 PM CDT	Special Weather Statement	HGX	Austin, Waller	27 min
Aug 6, 4:59 PM CDT	Special Weather Statement	HGX	Waller	46 min
Aug 6, 5:02 PM CDT	Special Weather Statement	HGX	Austin	43 min

Nearby

Special Weather Statements in Texas, 2017 Every special weather statement in 2017

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.