Alert archive / Louisiana / Flash Flood Watches in 2020
Flash Flood Watch 2, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood watch at Mar 3, 2020, 2:34 PM CST for 9 parishes in Louisiana; 5 counties in Mississippi. It took effect at Mar 4, 2020, 12:00 AM CST. It was in force for 19 hr.
The area
The counties it named.
The facts
- Issued
- Mar 3, 2020, 2:34 PM CST (20:34 UTC)
- In effect from
- Mar 4, 2020, 12:00 AM CST
- Expired
- Mar 4, 2020, 7:22 PM CST
- In force
- 19 hr
- Issued by
- NWS New Orleans, LA
- Flood severity
- None
Counties East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Pointe Coupee Parish, LA, Saint Helena Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Pearl River County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 8.6 hours before the alert went out and 123 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
- 185 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 779 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 212 m²/s²
- 0-3 km storm-relative helicity
- 313 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
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 New Orleans, LA wrote its last area forecast discussion before this flash flood watch went out at Mar 3, 11:51 AM CST, 2 hours 43 minutes earlier.
Area forecast discussion, Mar 3, 11:51 AM CST, 2 hours 43 minutes before
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</html>The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 3, 11:38 AM CST | River Flood Warning | LIX | Washington | 3 days |
| Mar 3, 11:38 AM CST | River Flood Warning | LIX | Saint Tammany | 21 days |
| Mar 3, 11:38 AM CST | River Flood Warning | LIX | Pike, Walthall | 32 hr |
| Mar 3, 11:39 AM CST | River Flood Warning | LIX | Pearl River | 3 days |
| Mar 3, 11:39 AM CST | River Flood Warning | LIX | Pearl River | 3 days |
Nearby
Flash Flood Watches in Louisiana, 2020Flash Flood Watches in Mississippi, 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.