Alert archive / Mississippi / Areal Flood Advisories in 2021

Areal Flood Advisory 252, NWS Mobile, AL

September 28, 2021Perry County, Stone County, Mississippi

NWS Mobile, AL issued this areal flood advisory at Sep 28, 2021, 1:56 PM CDT for Perry County, Stone County, Mississippi. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Sep 28, 2021, 1:56 PM CDT (18:56 UTC)
Expired: Sep 28, 2021, 4:49 PM CDT
In force: 3 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 85 km from the middle of the area, began a volume at 18:58 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.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.9 hours before the alert went out and 103 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: 2461 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 624 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

921 
WGUS84 KMOB 281856
FLSMOB

Flood Advisory
National Weather Service Mobile AL
156 PM CDT Tue Sep 28 2021

MSC111-131-282200-
/O.NEW.KMOB.FA.Y.0252.210928T1856Z-210928T2200Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Perry MS-Stone MS-
156 PM CDT Tue Sep 28 2021

The National Weather Service in Mobile has issued a

* Urban and Small Stream Flood Advisory for...
  Southern Perry County in southeastern Mississippi...
  Northeastern Stone County in southeastern Mississippi...

* Until 500 PM CDT.

* At 156 PM CDT, Doppler radar indicated heavy rain due to 
  thunderstorms. This will cause urban and small stream flooding. 
  Between 1 and 2 inches of rain have fallen.

* Some locations that will experience flooding include...
  Wiggins, Beaumont, New Augusta, Oak Grove, Janice, Barbara, Deep 
  Creek, Progress, Ferguson, Wingate, Little Creek, Mahned, Whites 
  Crossing and Belleville.

Additional rainfall amounts of 1 to 2 inches are expected over the 
area. This additional rain will result in minor flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3123 8915 3119 8885 3091 8884 3091 8889
      3089 8888 3084 8907 3084 8916 3091 8916
      3091 8914 3100 8914 3100 8915

$$

MM

3 follow-up statements

284 
WGUS84 KMOB 282010
FLSMOB

Flood Advisory
National Weather Service Mobile AL
310 PM CDT Tue Sep 28 2021

MSC131-282020-
/O.CAN.KMOB.FA.Y.0252.000000T0000Z-210928T2200Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Stone MS-
310 PM CDT Tue Sep 28 2021

...THE URBAN AND SMALL STREAM FLOOD ADVISORY IS CANCELLED FOR 
NORTHEASTERN STONE COUNTY...

Heavy rainfall has ended and any threat for minor flooding has ended.

LAT...LON 3123 8915 3119 8885 3099 8884 3094 8894
      3093 8914 3100 8914 3100 8915

$$

MSC111-282200-
/O.CON.KMOB.FA.Y.0252.000000T0000Z-210928T2200Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Perry MS-
310 PM CDT Tue Sep 28 2021

...THE URBAN AND SMALL STREAM FLOOD ADVISORY REMAINS IN EFFECT UNTIL 
5 PM CDT THIS AFTERNOON FOR SOUTHERN PERRY COUNTY...

At 310 PM CDT, Doppler radar indicated heavy rain due to 
thunderstorms. This will cause urban and small stream flooding.

Some locations that will experience flooding include...
  Beaumont, New Augusta, Oak Grove, Janice, Barbara, Ferguson, 
  Wingate, Progress, Mahned, Little Creek and Belleville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3123 8915 3119 8885 3099 8884 3094 8894
      3093 8914 3100 8914 3100 8915

$$

MM

585 
WGUS84 KMOB 282109
FLSMOB

Flood Advisory
National Weather Service Mobile AL
409 PM CDT Tue Sep 28 2021

MSC111-282200-
/O.CON.KMOB.FA.Y.0252.000000T0000Z-210928T2200Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Perry MS-
409 PM CDT Tue Sep 28 2021

...THE URBAN AND SMALL STREAM FLOOD ADVISORY REMAINS IN EFFECT UNTIL 
5 PM CDT THIS AFTERNOON FOR SOUTHERN PERRY COUNTY...

At 409 PM CDT, Doppler radar indicated heavy rain due to 
thunderstorms. This will cause urban and small stream flooding. 
Between 1 and 4 inches of rain have fallen.

Some locations that will experience flooding include...
  Beaumont, New Augusta, Oak Grove, Janice, Barbara, Ferguson, 
  Wingate, Progress, Mahned, Little Creek and Belleville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3123 8915 3119 8885 3099 8884 3094 8894
      3093 8914 3100 8914 3100 8915

$$

MM

861 
WGUS84 KMOB 282149
FLSMOB

Flood Advisory
National Weather Service Mobile AL
449 PM CDT Tue Sep 28 2021

MSC111-282159-
/O.CAN.KMOB.FA.Y.0252.000000T0000Z-210928T2200Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Perry MS-
449 PM CDT Tue Sep 28 2021

...THE URBAN AND SMALL STREAM FLOOD ADVISORY IS CANCELLED FOR 
SOUTHERN PERRY COUNTY...

The heavy rain has ended. Please continue to heed any additional 
information from local officials.

LAT...LON 3123 8915 3119 8885 3099 8884 3094 8894
      3093 8914 3100 8914 3100 8915

$$

MM

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 28, 7:26 AM CDT	Dense Fog Advisory	MOB	George, Greene, Perry, Stone, Wayne	2 hr
Sep 28, 12:48 PM CDT	Special Weather Statement	MOB	George	42 min
Sep 28, 1:15 PM CDT	Special Weather Statement	MOB	George	45 min
Sep 28, 1:32 PM CDT	Areal Flood Advisory	MOB	George, Greene	2 hr
Sep 28, 2:22 PM CDT	Special Weather Statement	MOB	Wayne	38 min
Sep 28, 2:33 PM CDT	Areal Flood Advisory	MOB	Wayne	2 hr
Sep 28, 3:15 PM CDT	Areal Flood Advisory	MOB	Stone	5 hr

Nearby

Areal Flood Advisories in Mississippi, 2021 Every areal flood advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.