Alert archive / Alabama / Areal Flood Warnings in 2009

Areal Flood Warning 8, NWS Mobile, AL

March 28, 2009Baldwin County, Covington County, Escambia County, Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida

NWS Mobile, AL issued this areal flood warning at Mar 28, 2009, 11:41 PM CDT for Baldwin County, Covington County, Escambia County, Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 28, 2009, 11:41 PM CDT (04:41 UTC)
Expired: Mar 29, 2009, 7:45 AM CDT
In force: 8 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties Baldwin County, AL, Covington County, AL, Escambia County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL

The radar

The Eglin Afb radar (KEVX), 112 km from the middle of the area, began a volume at 04:45 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, 4.7 hours before the alert went out and 262 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: 665 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1464 m above ground
0-6 km bulk shear: 91 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 238 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 warning went out at Mar 28, 3:43 PM CDT, 7 hours 58 minutes earlier.

Area forecast discussion, Mar 28, 3:43 PM CDT, 7 hours 58 minutes before

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Hazardous weather outlook, Mar 28, 12:35 PM CDT, 11 hours 6 minutes before

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In the hours before

Local storm report, Mar 28, 7:47 PM CDT, 3 hours 54 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 28, 11:31 PM CDT	Areal Flood Warning	MOB	Baldwin, Clarke, Mobile, Monroe, Washington	8 hr

Nearby

Areal Flood Warnings in Alabama, 2009 Areal Flood Warnings in Florida, 2009 Every areal flood warning in 2009

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.