Alert archive / Texas / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 211, NWS San Angelo, TX
NWS San Angelo, TX issued this severe thunderstorm warning at Jul 20, 2009, 1:29 PM CDT for McCulloch County, Menard County, Texas. It was in force for 61 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
- Jul 20, 2009, 1:29 PM CDT (18:29 UTC)
- Expired
- Jul 20, 2009, 2:30 PM CDT
- In force
- 61 min
- Issued by
- NWS San Angelo, TX
- Area
- Storm-based polygon
Counties McCulloch County, TX, Menard County, TX
The radar
The San Angelo radar (KSJT), 94 km from the middle of the area, began a volume at 18:30 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
Fort Worth, TX (KFWD), launched 12:00Z, 6.5 hours before the alert went out and 294 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
- 2307 J/kg
- Mixed-layer CIN
- -141 J/kg
- Mixed-layer LCL
- 768 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 257 m²/s²
- 0-3 km storm-relative helicity
- 300 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 14.9
The office that day
Everything else NWS San Angelo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 10:48 AM CDT | Areal Flood Advisory | SJT | Brown | 102 min |
| Jul 20, 1:00 PM CDT | Areal Flood Advisory | SJT | Concho, Menard, Schleicher, Tom Green | 2 hr |
| Jul 20, 1:09 PM CDT | Areal Flood Advisory | SJT | Brown, Coleman | 3 hr |
| Jul 20, 1:14 PM CDT | Areal Flood Advisory | SJT | McCulloch | 3 hr |
| Jul 20, 2:43 PM CDT | Areal Flood Advisory | SJT | Kimble, Mason, Menard, Sutton | 107 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.