Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 107, NWS Jackson, MS

October 5, 2021Lowndes County, Noxubee County, Oktibbeha County, Mississippi

NWS Jackson, MS issued this flash flood warning at Oct 5, 2021, 7:15 PM CDT for Lowndes County, Noxubee County, Oktibbeha County, Mississippi. It was in force for 103 min. 2 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: Oct 5, 2021, 7:15 PM CDT (00:15 UTC)
Expired: Oct 5, 2021, 8:58 PM CDT
In force: 103 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Lowndes County, MS, Noxubee County, MS, Oktibbeha County, MS

The radar

The Columbus AFB radar (KGWX), 79 km from the middle of the area, began a volume at 00:17 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
Oct 5, 7:30 PM CDT	FLASH FLOOD	Brooksville, MS	WATER ON MAIN STREET.
Oct 5, 7:30 PM CDT	FLASH FLOOD	Brooksville, MS	WATER ON WILKINS STREET.

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, 0.3 hours before the alert went out and 167 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: 968 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1259 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -37 m²/s²
0-3 km storm-relative helicity: 47 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

600 
WGUS54 KJAN 060015
FFWJAN
MSC087-103-105-060215-
/O.NEW.KJAN.FF.W.0107.211006T0015Z-211006T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson MS
715 PM CDT Tue Oct 5 2021

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Western Noxubee County in east central Mississippi...
  Southwestern Lowndes County in northeastern Mississippi...
  Southeastern Oktibbeha County in northeastern Mississippi...

* Until 915 PM CDT.

* At 715 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 2.5 inches of 
  rain have fallen. Additional rainfall amounts of 1 to 3 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...
  Macon, Brooksville, Crawford, Mashulaville, Oktoc, Deerbrook and 
  Sessums.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3329 8881 3337 8882 3344 8874 3338 8851
      3329 8847 3321 8844 3300 8860 3293 8881

FLASH FLOOD...RADAR INDICATED

$$

EC

1 follow-up statement

852 
WGUS74 KJAN 060158
FFSJAN

Flash Flood Statement
National Weather Service Jackson MS
858 PM CDT Tue Oct 5 2021

MSC087-103-105-060208-
/O.CAN.KJAN.FF.W.0107.000000T0000Z-211006T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lowndes MS-Noxubee MS-Oktibbeha MS-
858 PM CDT Tue Oct 5 2021

...FLASH FLOOD WARNING IS CANCELLED FOR WESTERN NOXUBEE, 
SOUTHWESTERN LOWNDES AND SOUTHEASTERN OKTIBBEHA COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3329 8881 3337 8882 3344 8874 3338 8851
      3329 8847 3321 8844 3300 8860 3293 8881

$$

DC

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 5, 7:06 PM CDT	Special Weather Statement	JAN	Lowndes	24 min
Oct 5, 7:14 PM CDT	Severe Thunderstorm Warning	JAN	Kemper, Lowndes, Noxubee, Oktibbeha, Winston	46 min
Oct 5, 7:34 PM CDT	Special Weather Statement	JAN	Clay	41 min
Oct 5, 7:53 PM CDT	Severe Thunderstorm Warning	JAN	Clay, Lowndes	67 min
Oct 5, 8:14 PM CDT	Flash Flood Warning	JAN	Lowndes, Noxubee	2 hr
Oct 5, 10:07 PM CDT	Flash Flood Warning	JAN	Lauderdale	2 hr
Oct 6, 5:50 AM CDT	Dense Fog Advisory	JAN	Covington, Forrest, Jefferson Davis, Jones, Lamar, Lawrence and 1 more	3 hr

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.