Alert archive / Louisiana / Flood Watches in 2020
Flood Watch 2, NWS New Orleans, LA
NWS New Orleans, LA issued this flood watch at Oct 27, 2020, 1:50 PM CDT for Saint Bernard Parish, Saint John the Baptist Parish, Washington Parish, Louisiana; Pearl River County, Walthall County, Mississippi. It took effect at Oct 28, 2020, 7:00 AM CDT. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Oct 27, 2020, 1:50 PM CDT (18:50 UTC)
- In effect from
- Oct 28, 2020, 7:00 AM CDT
- Expired
- Oct 28, 2020, 9:22 PM CDT
- In force
- 14 hr
- Issued by
- NWS New Orleans, LA
- Flood severity
- None
Counties Saint Bernard Parish, LA, Saint John the Baptist Parish, LA, Washington Parish, LA, Pearl River County, MS, Walthall County, MS
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 6.8 hours before the alert went out and 45 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
- 94 J/kg
- Mixed-layer CIN
- -141 J/kg
- Mixed-layer LCL
- 576 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 156 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.0
What forecasters said that day
The local office's own words before this 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 flood watch went out at Oct 27, 12:44 PM CDT, 1 hour 6 minutes earlier.
Area forecast discussion, Oct 27, 12:44 PM CDT, 1 hour 6 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 |
|---|---|---|---|---|
| Oct 27, 4:35 AM CDT | Hurricane Warning | LIX | Assumption, Saint Bernard, Saint James, Saint John the Baptist, Washington | 45 hr |
| Oct 27, 7:00 AM CDT | Storm Surge Warning | LIX | Saint Bernard, Saint John the Baptist | 42 hr |
| Oct 27, 7:00 AM CDT | Tropical Storm Warning | LIX | Saint Helena, Tangipahoa, Washington | 39 hr |
| Oct 27, 4:38 PM CDT | Special Weather Statement | LIX | Saint Tammany | 52 min |
| Oct 27, 4:48 PM CDT | Areal Flood Advisory | LIX | Saint Tammany, Washington | 3 hr |
| Oct 27, 9:10 AM CDT | River Flood Warning | LIX | Pearl River | 5 days |
| Oct 27, 9:10 AM CDT | River Flood Warning | LIX | Pearl River | 68 hr |
| Oct 27, 9:50 AM CDT | River Flood Warning | LIX | Hancock | 45 hr |
| Oct 27, 9:50 AM CDT | River Flood Warning | LIX | Harrison | 67 hr |
Nearby
Flood Watches in Louisiana, 2020Flood Watches in Mississippi, 2020Every 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.