Alert archive / Mississippi / Flash Flood Watches in 2020
Flash Flood Watch 11, NWS Jackson, MS
NWS Jackson, MS issued this flash flood watch at Sep 13, 2020, 2:32 AM CDT for 19 counties in Mississippi. It took effect at Sep 15, 2020, 7:00 AM CDT. It was in force for 13 hr.
The area
The counties it named.
The facts
- Issued
- Sep 13, 2020, 2:32 AM CDT (07:32 UTC)
- In effect from
- Sep 15, 2020, 7:00 AM CDT
- Expired
- Sep 15, 2020, 8:24 PM CDT
- In force
- 13 hr
- Issued by
- NWS Jackson, MS
- Flood severity
- None
Counties Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Newton County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 61 km from the middle of the area, began a volume at 07:33 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 00:00Z, 7.5 hours before the alert went out and 178 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
- 1153 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 766 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 13, 12:43 AM CDT | Flash Flood Warning | JAN | Madison | 2 hr |
| Sep 13, 4:15 PM CDT | Tropical Storm Watch | JAN | Covington, Forrest, Franklin, Jefferson Davis, Jones, Lamar and 3 more | 42 hr |
Nearby
Flash 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; radar from the NEXRAD Level II archive.