Alert archive / Louisiana / Flash Flood Watches in 2020
Flash Flood Watch 6, NWS Lake Charles, LA
NWS Lake Charles, LA issued this flash flood watch at Oct 7, 2020, 3:34 PM CDT for 10 parishes in Louisiana; Jasper County, Newton County, Texas. It took effect at Oct 9, 2020, 1:00 AM CDT. It was in force for 26 hr.
The area
The counties it named.
The facts
- Issued
- Oct 7, 2020, 3:34 PM CDT (20:34 UTC)
- In effect from
- Oct 9, 2020, 1:00 AM CDT
- Expired
- Oct 10, 2020, 2:34 AM CDT
- In force
- 26 hr
- Issued by
- NWS Lake Charles, LA
- Flood severity
- None
Counties Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Cameron Parish, LA, Evangeline Parish, LA, Lafayette Parish, LA, Rapides Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Vernon Parish, LA, Jasper County, TX, Newton County, TX
The radar
The Ft Polk radar (KPOE), 61 km from the middle of the area, began a volume at 20:33 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
Slidell Radar S, LA (KSIL), launched 12:00Z, 8.6 hours before the alert went out and 295 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
- 35 J/kg
- Mixed-layer CIN
- -169 J/kg
- Mixed-layer LCL
- 742 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Lake Charles, LA wrote its last area forecast discussion before this flash flood watch went out at Oct 7, 12:31 PM CDT, 3 hours 3 minutes earlier.
Area forecast discussion, Oct 7, 12:31 PM CDT, 3 hours 3 minutes before
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</html>Hazardous weather outlook, Oct 7, 4:23 AM CDT, 11 hours 11 minutes before
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</html>The office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 7, 10:27 AM CDT | Hurricane Watch | LCH | Allen, Avoyelles, Cameron, Evangeline, Lafayette, Rapides and 2 more | 12 hr |
| Oct 7, 10:27 AM CDT | Storm Surge Watch | LCH | Cameron, Saint Martin | 24 hr |
| Oct 7, 11:12 AM CDT | River Flood Warning | LCH | Saint Martin, St. Mary | 66 hr |
| Oct 7, 4:06 PM CDT | Tropical Storm Watch | LCH | Beauregard, Vernon | 6 hr |
Nearby
Flash Flood Watches in Louisiana, 2020Flash Flood Watches in Texas, 2020Every flash flood watch in 2020
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.