Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 97, NWS Jackson, MS

September 17, 2021Lowndes County, Mississippi

NWS Jackson, MS issued this flash flood warning at Sep 17, 2021, 9:27 PM CDT for Lowndes County, Mississippi. It was in force for 93 min. 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: Sep 17, 2021, 9:27 PM CDT (02:27 UTC)
Expired: Sep 17, 2021, 11:00 PM CDT
In force: 93 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

County Lowndes County, MS

The radar

The Columbus AFB radar (KGWX), 25 km from the middle of the area, began a volume at 02:27 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
Sep 17, 10:00 PM CDT	FLASH FLOOD	2 Ssw Caledonia, MS	FLOODING REPORTED AT WOLFE RD AND DOWDLE RD.

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

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 2.5 hours before the alert went out and 156 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: 1075 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 805 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

310 
WGUS54 KJAN 180227
FFWJAN
MSC087-180400-
/O.NEW.KJAN.FF.W.0097.210918T0227Z-210918T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson MS
927 PM CDT Fri Sep 17 2021

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Northeastern Lowndes County in northeastern Mississippi...

* Until 1100 PM CDT.

* At 927 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4 inches of rain 
  have fallen. Additional rainfall amounts up to 2 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Columbus, Caledonia and Steens.

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 3368 8839 3369 8838 3369 8837 3369 8836
      3370 8836 3370 8835 3370 8834 3371 8834
      3372 8833 3373 8827 3355 8831 3355 8838

FLASH FLOOD...RADAR INDICATED

$$

DL

1 follow-up statement

457 
WGUS74 KJAN 180318
FFSJAN

Flash Flood Statement
National Weather Service Jackson MS
1018 PM CDT Fri Sep 17 2021

MSC087-180400-
/O.CON.KJAN.FF.W.0097.000000T0000Z-210918T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lowndes MS-
1018 PM CDT Fri Sep 17 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 11 PM CDT THIS 
EVENING FOR NORTHEASTERN LOWNDES COUNTY...

At 1018 PM CDT, local law enforcement reported thunderstorms 
producing heavy rain across the warned area. Between 3 and 5 inches 
of rain have fallen. Flash flooding is already occurring.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Law enforcement reported. At 10 PM, flooding was
         reported along Wolfe Rd at Dowdle Rd south of Caledonia.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Columbus, Caledonia and Steens.

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 3368 8839 3369 8838 3369 8837 3369 8836
      3370 8836 3370 8835 3370 8834 3371 8834
      3372 8833 3373 8827 3355 8831 3355 8838

FLASH FLOOD...OBSERVED

$$

DL

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 17, 7:30 PM CDT	Special Weather Statement	JAN	Clay	60 min
Sep 17, 7:48 PM CDT	Special Weather Statement	JAN	Bolivar	57 min
Sep 17, 10:05 PM CDT	Flash Flood Warning	JAN	Issaquena, Sharkey	2 hr
Sep 18, 2:30 PM CDT	Special Weather Statement	JAN	Lowndes	45 min
Sep 18, 3:41 PM CDT	Special Weather Statement	JAN	Forrest	49 min
Sep 18, 4:35 PM CDT	Flash Flood Warning	JAN	Forrest, Lamar	42 min
Sep 18, 4:49 PM CDT	Special Weather Statement	JAN	Winston	41 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.