Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 6, NWS Jackson, MS

March 16, 2021Clarke County, Jasper County, Mississippi

NWS Jackson, MS issued this flash flood warning at Mar 16, 2021, 10:18 AM CDT for Clarke County, Jasper County, Mississippi. It was in force for 3 hr. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 16, 2021, 10:18 AM CDT (15:18 UTC)
Expired: Mar 16, 2021, 1:15 PM CDT
In force: 3 hr
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Clarke County, MS, Jasper County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 102 km from the middle of the area, began a volume at 15:18 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.

What was reported inside it

Time	Report	Where	Remark
Mar 16, 12:00 PM CDT	FLASH FLOOD	3 Se Carmichael, MS	WATER ACROSS CR 621 PER EM.
Mar 16, 12:00 PM CDT	FLASH FLOOD	3 Ssw Harmony, MS	WATER ACROSS COUNTY ROAD 280 PER EM.
Mar 16, 12:00 PM CDT	FLASH FLOOD	6 E Carmichael, MS	WATER ACROSS CR 511 PER EM.
Mar 16, 12:00 PM CDT	FLASH FLOOD	Stringer, MS	WATER ACROSS SOME ROADS NEAR STRINGER PER EM.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 3.3 hours before the alert went out and 112 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

477 
WGUS54 KJAN 161518
FFWJAN
MSC023-061-161815-
/O.NEW.KJAN.FF.W.0006.210316T1518Z-210316T1815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson MS
1018 AM CDT Tue Mar 16 2021

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Clarke County in east central Mississippi...
  Southern Jasper County in east central Mississippi...

* Until 115 PM CDT.

* At 1017 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 3 and 4 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Quitman, Stringer, Heidelberg, Goodwater, Barnett, Stafford 
  Springs, De Soto, Sykes, Crandall, Vernon, Moss, Shubuta and 
  Pachuta.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3195 8931 3218 8844 3189 8847 3184 8877
      3180 8931 3181 8932

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 3 HOURS 

$$

JC

1 follow-up statement

682 
WGUS74 KJAN 161645
FFSJAN

Flash Flood Statement
National Weather Service Jackson MS
1145 AM CDT Tue Mar 16 2021

MSC023-061-161815-
/O.CON.KJAN.FF.W.0006.000000T0000Z-210316T1815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clarke MS-Jasper MS-
1145 AM CDT Tue Mar 16 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 PM CDT THIS 
AFTERNOON FOR CLARKE AND SOUTHERN JASPER COUNTIES...

At 1144 AM CDT, Doppler radar indicated thunderstorms producing 
heavy rain across the warned area. Between 3 and 4 inches of rain 
have fallen. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Doppler radar.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other
         drainage and low lying areas.

Some locations that will experience flash flooding include...
  Quitman, Stringer, Heidelberg, Goodwater, Barnett, Stafford 
  Springs, De Soto, Sykes, Crandall, Vernon, Moss, Shubuta and 
  Pachuta.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3195 8931 3218 8844 3189 8847 3184 8877
      3180 8931 3181 8932

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 3 HOURS 

$$

JC

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 15, 7:23 PM CDT	Severe Thunderstorm Warning	JAN	Leake, Scott	38 min
Mar 15, 11:39 PM CDT	Special Weather Statement	JAN	Carroll, Leflore	36 min
Mar 15, 11:53 PM CDT	Severe Thunderstorm Warning	JAN	Grenada, Montgomery, Webster	36 min
Mar 16, 2:54 AM CDT	Flash Flood Warning	JAN	Clarke	6 hr
Mar 16, 6:52 AM CDT	Special Weather Statement	JAN	Jasper	38 min
Mar 16, 11:08 AM CDT	Flash Flood Warning	JAN	Covington, Jones, Smith	3 hr
Mar 16, 11:49 AM CDT	Flash Flood Watch	JAN	Clarke, Covington, Jasper, Jefferson Davis, Jones, Lauderdale and 4 more	7 hr
Mar 16, 2:40 PM CDT	River Flood Warning	JAN	Jones	5 days
Mar 16, 4:50 PM CDT	Severe Thunderstorm Warning	JAN	Issaquena	40 min
Mar 16, 4:57 PM CDT	Special Weather Statement	JAN	Rankin	33 min
Mar 16, 4:58 PM CDT	Special Weather Statement	JAN	Winston	32 min
Mar 16, 5:17 PM CDT	Severe Thunderstorm Warning	JAN	Washington	43 min
Mar 16, 5:29 PM CDT	Special Weather Statement	JAN	Rankin	31 min
Mar 16, 6:34 PM CDT	Special Weather Statement	JAN	Copiah	26 min
Mar 16, 6:45 PM CDT	Severe Thunderstorm Warning	JAN	Copiah	60 min
Mar 16, 6:59 PM CDT	Special Weather Statement	JAN	Attala	46 min

Nearby

Flash Flood Warnings in Mississippi, 2021 Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.