Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 91, NWS Memphis, TN

December 29, 2021Calhoun County, Yalobusha County, Mississippi

NWS Memphis, TN issued this flash flood warning at Dec 29, 2021, 9:17 AM CST for Calhoun County, Yalobusha County, Mississippi. It was in force for 3 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: Dec 29, 2021, 9:17 AM CST (15:17 UTC)
Expired: Dec 29, 2021, 12:30 PM CST
In force: 3 hr
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

Counties Calhoun County, MS, Yalobusha County, MS

The radar

The Columbus AFB radar (KGWX), 107 km from the middle of the area, began a volume at 15:19 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
Dec 29, 10:15 AM CST	FLASH FLOOD	Bruce, MS	NUMEROUS HIGH WATER RESCUES IN BRUCE, EXTENDING OUT TO SURROUNDING RURAL AREAS.

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

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 3.3 hours before the alert went out and 108 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1900 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

905 
WGUS54 KMEG 291517
FFWMEG
MSC013-161-291830-
/O.NEW.KMEG.FF.W.0091.211229T1517Z-211229T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Memphis TN
917 AM CST Wed Dec 29 2021

The National Weather Service in Memphis has issued a

* Flash Flood Warning for...
  Northwestern Calhoun County in northeastern Mississippi...
  Southeastern Yalobusha County in northwestern Mississippi...

* Until 1230 PM CST.

* At 917 AM CST, Between 4 and 5 inches of rain have fallen. 
  Additional rainfall amounts of 1 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...Law enforcement reported flooding in the Bruce area.

  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...
  Bruce, Pittsboro, Shepherd, Skuna, Ellard, Bounds, Benwood, Tyson, 
  Spearman and Gums.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3399 8962 3410 8924 3407 8924 3391 8925
      3386 8951 3387 8951 3387 8961 3387 8963
      3387 8964

FLASH FLOOD...OBSERVED

$$

1 follow-up statement

563 
WGUS74 KMEG 291719
FFSMEG

Flash Flood Statement
National Weather Service Memphis TN
1119 AM CST Wed Dec 29 2021

MSC013-161-291830-
/O.CON.KMEG.FF.W.0091.000000T0000Z-211229T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Calhoun MS-Yalobusha MS-
1119 AM CST Wed Dec 29 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 PM CST THIS 
AFTERNOON FOR NORTHWESTERN CALHOUN AND SOUTHEASTERN YALOBUSHA 
COUNTIES...

At 1119 AM CST, Between 5 and 6 inches of rain have fallen over 
portions of Calhoun County. Calhoun County Emergency Management 
reported widespread flash flooding with several water rescues mainly 
in the Bruce area.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Emergency management reported.

IMPACT...Life threatening flash flooding of creeks and streams,
         urban areas, highways, streets and underpasses.

Some locations that will experience flash flooding include...
  Bruce, Pittsboro, Shepherd, Skuna, Ellard, Bounds, Benwood, Tyson, 
  Spearman and Gums.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3399 8962 3410 8924 3407 8924 3391 8925
      3386 8951 3387 8951 3387 8961 3387 8963
      3387 8964

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 28, 9:46 PM CST	Areal Flood Advisory	MEG	Chickasaw, Itawamba, Monroe	3 hr
Dec 28, 10:22 PM CST	Special Weather Statement	MEG	Monroe	38 min
Dec 28, 10:37 PM CST	Flash Flood Warning	MEG	Monroe	3 hr
Dec 29, 9:00 AM CST	Areal Flood Advisory	MEG	Calhoun, Chickasaw, Lee, Pontotoc, Yalobusha	3 hr
Dec 29, 12:14 PM CST	Areal Flood Warning	MEG	Calhoun, Chickasaw, Lee, Pontotoc, Yalobusha	3 hr
Dec 29, 1:59 PM CST	Special Weather Statement	MEG	DeSoto	31 min
Dec 29, 4:36 PM CST	Special Weather Statement	MEG	Calhoun	24 min
Dec 29, 4:53 PM CST	Severe Thunderstorm Warning Considerable damage threat	MEG	Calhoun, Chickasaw, Itawamba, Lee, Monroe, Pontotoc	52 min
Dec 29, 4:58 PM CST	Severe Thunderstorm Warning Considerable damage threat	MEG	Prentiss, Tishomingo	14 min
Dec 29, 5:02 PM CST	Areal Flood Advisory	MEG	Prentiss	2 hr
Dec 29, 5:06 PM CST	Tornado Warning	MEG	Calhoun, Chickasaw	39 min
Dec 29, 5:29 PM CST	Severe Thunderstorm Warning Considerable damage threat	MEG	Chickasaw, Itawamba, Monroe	46 min
Dec 29, 5:42 PM CST	Areal Flood Advisory	MEG	Calhoun, Chickasaw, Itawamba, Lee, Monroe, Pontotoc	3 hr
Dec 29, 5:53 PM CST	Severe Thunderstorm Warning	MEG	Monroe	37 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.