Alert archive / Texas / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 174, NWS San Angelo, TX
NWS San Angelo, TX issued this severe thunderstorm warning at Jun 11, 2009, 2:51 PM CDT for Brown County, Texas. It was in force for 24 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
- Jun 11, 2009, 2:51 PM CDT (19:51 UTC)
- Expired
- Jun 11, 2009, 3:15 PM CDT
- In force
- 24 min
- Issued by
- NWS San Angelo, TX
- Area
- Storm-based polygon
County Brown County, TX
The radar
The Dyess AFB radar (KDYX), 88 km from the middle of the area, began a volume at 19:51 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 |
|---|---|---|---|
| Jun 11, 2:32 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 7.9 hours before the alert went out and 199 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.
- Mixed-layer CAPE
- 1544 J/kg
- Mixed-layer CIN
- -116 J/kg
- Mixed-layer LCL
- 556 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 544 m²/s²
- 0-3 km storm-relative helicity
- 715 m²/s²
- Significant tornado parameter
- 3.1
- Supercell composite
- 55.5
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 San Angelo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 11, 1:03 PM CDT, 1 hour 48 minutes earlier.
Area forecast discussion, Jun 11, 1:03 PM CDT, 1 hour 48 minutes before
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</html>Hazardous weather outlook, Jun 11, 4:31 AM CDT, 10 hours 20 minutes before
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Local storm report, Jun 11, 9:43 AM CDT, 5 hours 8 minutes before
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</html>The office that day
Everything else NWS San Angelo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 7:50 PM CDT | Severe Thunderstorm Warning | SJT | Brown | 25 min |
| Jun 11, 3:06 PM CDT | Severe Thunderstorm Warning | SJT | Callahan | 39 min |
| Jun 11, 3:50 PM CDT | Severe Thunderstorm Warning | SJT | Callahan | 40 min |
| Jun 11, 3:55 PM CDT | Tornado Warning | SJT | Brown | 50 min |
| Jun 11, 4:47 PM CDT | Severe Thunderstorm Warning | SJT | Brown | 58 min |
| Jun 11, 5:15 PM CDT | Severe Thunderstorm Warning | SJT | Callahan | 45 min |
| Jun 11, 5:38 PM CDT | Severe Thunderstorm Warning | SJT | Brown, San Saba | 67 min |
| Jun 11, 5:43 PM CDT | Severe Thunderstorm Warning | SJT | Callahan | 24 min |
| Jun 11, 6:06 PM CDT | Severe Thunderstorm Warning | SJT | McCulloch | 54 min |
| Jun 11, 6:39 PM CDT | Severe Thunderstorm Warning | SJT | San Saba | 66 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2009Every severe thunderstorm warning in 2009
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.