Alert archive / Texas / Mesoscale Discussions in 2005
Mesoscale Discussion 413
The Storm Prediction Center issued this mesoscale discussion at Mar 27, 2005, 3:48 AM CST for 14 parishes in Louisiana; 15 counties in Texas. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Mar 27, 2005, 3:48 AM CST (09:48 UTC)
- Expired
- Mar 27, 2005, 5:15 AM CST
- In force
- 87 min
- Issued by
- the Storm Prediction Center
All 29 counties
Acadia Parish, LA, Allen Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Rapides Parish, LA, Saint Landry Parish, LA, St. Mary Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, Brazoria County, TX, Chambers County, TX, Fort Bend County, TX, Galveston County, TX, Hardin County, TX, Harris County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, Polk County, TX, San Jacinto County, TX, Tyler County, TX
The radar
The Houston radar (KHGX), 92 km from the middle of the area, began a volume at 09:52 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
Shreveport, LA (KSHV), launched 00:00Z, 9.8 hours before the alert went out and 300 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 664 m above ground
- 0-6 km bulk shear
- 79 kt
- 0-1 km storm-relative helicity
- 207 m²/s²
- 0-3 km storm-relative helicity
- 394 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 26, 9:18 PM CST | Mesoscale Discussion | SPC | East Carroll, Franklin, Morehouse, Richland, West Carroll | 57 min |
| Mar 27, 12:52 AM CST | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 15 more | 113 min |
| Mar 27, 1:14 AM CST | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, Livingston, Orleans, Saint Bernard and 7 more | 91 min |
| Mar 27, 1:35 AM CST | Severe Thunderstorm Watch | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 9 more | 6 hr |
| Mar 27, 3:27 AM CST | Mesoscale Discussion | SPC | Washington | 33 min |
| Mar 27, 6:24 AM CST | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 10 more | 2 hr |
Nearby
Mesoscale Discussions in Texas, 2005Mesoscale Discussions in Louisiana, 2005Every mesoscale discussion in 2005
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.