Alert archive / Alabama / Areal Flood Advisories in 2021

Areal Flood Advisory 74, NWS Mobile, AL

June 30, 20214 counties in Alabama

NWS Mobile, AL issued this areal flood advisory at Jun 30, 2021, 7:18 PM CDT for 4 counties in Alabama. It was in force for 117 min.

The area

The counties it named.

The facts

Issued: Jun 30, 2021, 7:18 PM CDT (00:18 UTC)
Expired: Jun 30, 2021, 9:15 PM CDT
In force: 117 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Butler County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL

The radar

The Ft Rucker radar (KEOX), 109 km from the middle of the area, began a volume at 00:18 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

Birmingham, AL (KBMX), launched 00:00Z, 0.3 hours before the alert went out and 183 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: 1016 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1300 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: -13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Mobile, AL wrote its last area forecast discussion before this areal flood advisory went out at Jun 30, 7:03 PM CDT, 15 minutes earlier.

Area forecast discussion, Jun 30, 7:03 PM CDT, 15 minutes before

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In the hours before

Special weather statement, Jun 30, 2:53 PM CDT, 4 hours 25 minutes before

Special Weather Statement
National Weather Service Mobile AL
253 PM CDT Wed Jun 30 2021

ALZ261-263-264-302030-
Baldwin Central AL-Mobile Central AL-Mobile Inland AL-
253 PM CDT Wed Jun 30 2021

...A STRONG THUNDERSTORM WILL AFFECT THE FOLLOWING COUNTIES...CENTRAL
MOBILE AND WESTERN BALDWIN COUNTIES UNTIL 330 PM CDT...

At 252 PM CDT, the strong thunderstorm was located 5 miles northeast
of Downtown Mobile, moving west at 15 mph.

Wind gusts up to 40 mph will be possible with this storm.

Locations impacted include...
Midtown Mobile, Downtown Mobile, Prichard, Saraland, Chickasaw,
Semmes, I65 And I165, I65 And AL 158, I10 And I65 and Mobile Regional
Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3075 8792 3068 8796 3069 8794 3065 8793
      3068 8797 3072 8797 3068 8798 3074 8803
      3067 8802 3067 8803 3075 8804 3062 8806
      3063 8829 3089 8827 3079 8792 3061 8791
TIME...MOT...LOC 1952Z 098DEG 19KT 3073 8798

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 3:22 PM CDT	Areal Flood Advisory	MOB	Baldwin, Clarke, Escambia, Monroe	3 hr
Jul 1, 7:31 AM CDT	Areal Flood Advisory	MOB	Escambia, Santa Rosa	3 hr

Nearby

Areal Flood Advisories in Alabama, 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.