Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 5, NWS Jackson, MS

March 16, 2021Clarke County, Mississippi

NWS Jackson, MS issued this flash flood warning at Mar 16, 2021, 2:54 AM CDT for Clarke County, Mississippi. It was in force for 6 hr. 1 report 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, 2:54 AM CDT (07:54 UTC)
Expired: Mar 16, 2021, 9:00 AM CDT
In force: 6 hr
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

County Clarke County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 123 km from the middle of the area, began a volume at 07:54 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, 6:45 AM CDT	FLASH FLOOD	3 Ssw Harmony, MS	WATER ACROSS THE ROAD, CAR STRANDED.

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 00:00Z, 7.9 hours before the alert went out and 133 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: 1251 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1073 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 112 m²/s²
0-3 km storm-relative helicity: 235 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 6.2

Open this sounding in Storm Lab

The text

As transmitted.

445 
WGUS54 KJAN 160754
FFWJAN
MSC023-161200-
/O.NEW.KJAN.FF.W.0005.210316T0754Z-210316T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson MS
254 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...

* Until 700 AM CDT.

* At 254 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2.5 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, De Soto, Sykes, Crandall, Goodwater, Barnett and Pachuta.

Additional rainfall amounts up to 1 inch are possible in the warned 
area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

&&

LAT...LON 3207 8890 3219 8844 3218 8844 3217 8844
      3215 8844 3190 8848 3183 8891 3184 8891
      3186 8891 3187 8891 3194 8891

FLASH FLOOD...RADAR INDICATED

$$

21

1 follow-up statement

165 
WGUS54 KJAN 161145
FFWJAN
MSC023-161400-
/O.EXT.KJAN.FF.W.0005.000000T0000Z-210316T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Jackson has extended the

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

* Until 900 AM CDT.

* At 644 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 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, De Soto, Sykes, Crandall, Goodwater, Barnett and Pachuta.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area as new storms move into the area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report flooding to your local law enforcement agency when you 
can do so safely.

&&

LAT...LON 3207 8890 3219 8844 3218 8844 3217 8844
      3215 8844 3190 8848 3183 8891 3184 8891
      3186 8891 3187 8891 3194 8891

FLASH FLOOD...RADAR INDICATED

$$

21

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, 6:52 AM CDT	Special Weather Statement	JAN	Jasper	38 min
Mar 16, 10:18 AM CDT	Flash Flood Warning	JAN	Clarke, Jasper	3 hr
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.