Alert archive / Mississippi / Flash Flood Watches in 2021

Flash Flood Watch 3, NWS Jackson, MS

March 16, 202110 counties in Mississippi

NWS Jackson, MS issued this flash flood watch at Mar 16, 2021, 11:49 AM CDT for 10 counties in Mississippi. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Mar 16, 2021, 11:49 AM CDT (16:49 UTC)
Expired
Mar 16, 2021, 7:00 PM CDT
In force
7 hr
Issued by
NWS Jackson, MS
Flood severity
None

Counties Clarke County, MS, Covington County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Lauderdale County, MS, Lawrence County, MS, Newton County, MS, Simpson County, MS, Smith County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 71 km from the middle of the area, began a volume at 16:51 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

Jackson, MS (KJAN), launched 12:00Z, 4.8 hours before the alert went out and 81 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.

Skew-T log-pSkew-T log-p diagram, Jackson, MS at 12:00Z on 2021-03-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 812 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 12:00Z on 2021-03-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
812 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
660 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted.

281 
WGUS64 KJAN 161649
FFAJAN

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Jackson MS
1149 AM CDT Tue Mar 16 2021

MSZ051-052-055>058-063>066-170000-
/O.NEW.KJAN.FF.A.0003.210316T1649Z-210317T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Newton-Lauderdale-Simpson-Smith-Jasper-Clarke-Lawrence-Jefferson
Davis-Covington-Jones-
Including the cities of Conehatta, Taylorsville, Mount Olive, New 
Hebron, Laurel, Union, Prentiss, Newton, Monticello, Magee, 
Meridian, Stonewall, Bay Springs, Mendenhall, Bassfield, Shubuta, 
Heidelberg, Collins, Quitman, Decatur, and Raleigh
1149 AM CDT Tue Mar 16 2021

...FLASH FLOOD WATCH IN EFFECT UNTIL 7 PM CDT THIS EVENING...

The National Weather Service in Jackson has issued a

* Flash Flood Watch for portions of central Mississippi...east 
  central Mississippi...south central Mississippi and southeast 
  Mississippi, including the following areas, in central 
  Mississippi, Simpson and Smith. In east central Mississippi, 
  Clarke, Jasper, Lauderdale and Newton. In south central 
  Mississippi, Jefferson Davis and Lawrence. In southeast 
  Mississippi, Covington and Jones.

* Until 7 PM CDT this evening

* A Flash Flood Watch means that conditions may develop that lead to 
  flash flooding. Flash flooding is a very dangerous situation. You 
  should monitor later forecasts and be prepared to take action 
  should flash flood warnings be issued.

* Areas of flash flooding are likely. Some roads may be flooded or 
  closed. Some structures possibly threatened with inundation.

$$

DL
1 follow-up statement
796 
WGUS64 KJAN 162051
FFAJAN

Flood Watch
National Weather Service Jackson MS
351 PM CDT Tue Mar 16 2021

MSZ051-052-055>058-063>066-170000-
/O.CON.KJAN.FF.A.0003.000000T0000Z-210317T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Newton-Lauderdale-Simpson-Smith-Jasper-Clarke-Lawrence-
Jefferson Davis-Covington-Jones-
Including the cities of Newton, Union, Decatur, Conehatta, 
Meridian, Magee, Mendenhall, Taylorsville, Raleigh, Bay Springs, 
Heidelberg, Quitman, Stonewall, Shubuta, Monticello, New Hebron, 
Prentiss, Bassfield, Collins, Mount Olive, and Laurel
351 PM CDT Tue Mar 16 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

The Flash Flood Watch continues for

* Portions of central Mississippi, east central Mississippi, 
  south central Mississippi and southeast Mississippi, including 
  the following areas in central Mississippi, Simpson and Smith. 
  In east central Mississippi, Clarke, Jasper, Lauderdale and 
  Newton. In south central Mississippi, Jefferson Davis and 
  Lawrence. In southeast Mississippi, Covington and Jones. 

* Until 7 PM CDT this evening

* A Flash Flood Watch means that conditions may develop that 
  lead to flash flooding. Flash flooding is a very dangerous 
  situation. You should monitor later forecasts and be prepared 
  to take action should flash flood warnings be issued. 

* Areas of flash flooding are likely. Some roads may be flooded 
  or closed. Some structures possibly threatened with 
  inundation. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should flash flood warnings be issued.

&&

$$

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 15, 7:23 PM CDTSevere Thunderstorm WarningJANLeake, Scott38 min
Mar 15, 11:39 PM CDTSpecial Weather StatementJANCarroll, Leflore36 min
Mar 15, 11:53 PM CDTSevere Thunderstorm WarningJANGrenada, Montgomery, Webster36 min
Mar 16, 2:54 AM CDTFlash Flood WarningJANClarke6 hr
Mar 16, 6:52 AM CDTSpecial Weather StatementJANJasper38 min
Mar 16, 10:18 AM CDTFlash Flood WarningJANClarke, Jasper3 hr
Mar 16, 11:08 AM CDTFlash Flood WarningJANCovington, Jones, Smith3 hr
Mar 16, 2:40 PM CDTRiver Flood WarningJANJones5 days
Mar 16, 4:50 PM CDTSevere Thunderstorm WarningJANIssaquena40 min
Mar 16, 4:57 PM CDTSpecial Weather StatementJANRankin33 min
Mar 16, 4:58 PM CDTSpecial Weather StatementJANWinston32 min
Mar 16, 5:17 PM CDTSevere Thunderstorm WarningJANWashington43 min
Mar 16, 5:29 PM CDTSpecial Weather StatementJANRankin31 min
Mar 16, 6:34 PM CDTSpecial Weather StatementJANCopiah26 min
Mar 16, 6:45 PM CDTSevere Thunderstorm WarningJANCopiah60 min
Mar 16, 6:59 PM CDTSpecial Weather StatementJANAttala46 min

Nearby

Flash Flood Watches in Mississippi, 2021Every flash flood watch in 2021

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.