Alert archive / Alabama / Flash Flood Warnings in 2009

Flash Flood Warning 1, NWS Huntsville, AL

January 6, 20095 counties in Alabama

NWS Huntsville, AL issued this flash flood warning at Jan 6, 2009, 10:43 AM CST for 5 counties in Alabama. It was in force for 6 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: Jan 6, 2009, 10:43 AM CST (16:43 UTC)
Expired: Jan 6, 2009, 4:45 PM CST
In force: 6 hr
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Flood severity: None

Counties Cullman County, AL, DeKalb County, AL, Jackson County, AL, Marshall County, AL, Morgan County, AL

The radar

The Northeast Alabama radar (KHTX), 61 km from the middle of the area, began a volume at 16:45 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 12:00Z, 4.7 hours before the alert went out and 145 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: 163 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 560 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 240 m²/s²
0-3 km storm-relative helicity: 258 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 0.9

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Huntsville, AL wrote its last area forecast discussion before this flash flood warning went out at Jan 6, 9:30 AM CST, 1 hour 13 minutes earlier.

Area forecast discussion, Jan 6, 9:30 AM CST, 1 hour 13 minutes before

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Hazardous weather outlook, Jan 6, 4:01 AM CST, 6 hours 42 minutes before

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In the hours before

Local storm report, Jan 6, 8:45 AM CST, 1 hour 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
845 AM CST TUE JAN 06 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0816 AM     FLASH FLOOD      5 SW ALBERTVILLE        34.21N 86.27W
01/06/2009                   MARSHALL           AL   EMERGENCY MNGR

            BRIDGES REPORTED FLOODED ON NEEDMORE ROAD IN ALBERTVILLE.

0816 AM     FLASH FLOOD      1 N HORTON              34.21N 86.30W
01/06/2009                   MARSHALL           AL   EMERGENCY MNGR

            BRIDGE REPORTED FLOODED ON WHITE OAK ROAD.

0816 AM     FLASH FLOOD      1 NNW HORTON            34.22N 86.30W
01/06/2009                   MARSHALL           AL   EMERGENCY MNGR

            BRIDGE REPORTED FLOODED ON WHITE OAK ROAD.

0816 AM     FLASH FLOOD      4 SSW ALBERTVILLE       34.21N 86.25W
01/06/2009                   MARSHALL           AL   EMERGENCY MNGR

            BRIDGE REPORTED FLOODED ON HORTON ROAD.

0839 AM     FLASH FLOOD      4 ESE ALBERTVILLE       34.23N 86.15W
01/06/2009                   MARSHALL           AL   EMERGENCY MNGR

            EAST HENDERSON ROAD CLOSED DUE TO STANDING WATER OVER
            ROADWAY.

&&

KWEBER

Local storm report, Jan 6, 9:18 AM CST, 1 hour 25 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
918 AM CST TUE JAN 06 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0816 AM     FLOOD            5 SW ALBERTVILLE        34.21N 86.27W
01/06/2009                   MARSHALL           AL   EMERGENCY MNGR

            BRIDGES REPORTED FLOODED ON NEEDMORE ROAD IN ALBERTVILLE.

0816 AM     FLOOD            1 N HORTON              34.21N 86.30W
01/06/2009                   MARSHALL           AL   EMERGENCY MNGR

            BRIDGE REPORTED FLOODED ON WHITE OAK ROAD.

0816 AM     FLOOD            4 SSW ALBERTVILLE       34.21N 86.25W
01/06/2009                   MARSHALL           AL   EMERGENCY MNGR

            BRIDGE REPORTED FLOODED ON HORTON ROAD.

0816 AM     FLOOD            1 NNW HORTON            34.22N 86.30W
01/06/2009                   MARSHALL           AL   EMERGENCY MNGR

            BRIDGE REPORTED FLOODED ON WHITE OAK ROAD.

0839 AM     FLOOD            4 ESE ALBERTVILLE       34.23N 86.15W
01/06/2009                   MARSHALL           AL   EMERGENCY MNGR

            EAST HENDERSON ROAD CLOSED DUE TO STANDING WATER OVER
            ROADWAY.

&&

CDARDEN

Local storm report, Jan 6, 9:54 AM CST, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
954 AM CST TUE JAN 06 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0910 AM     FLOOD            5 NE ARAB               34.36N 86.42W
01/06/2009                   MARSHALL           AL   EMERGENCY MNGR

            WATER REPORTED OVER SCANT            MORGAN             AL   TRAINED SPOTTER

            1 TO 3 INCHES OF WATER COVERING ROAD NEAR THE
            INTERSECTION OF DOUGLAS ROAD AND HIGHWAY 55 EAST.

0944 AM     FLOOD            1 SE ANDERSON           34.92N 87.26W
01/06/2009                   LAUDERDALE         AL   EMERGENCY MNGR

            HIGHWAY 156 IN THE ANDERSON COMMUNITY IS CLOSED DUE TO
            HIGH WATER.

&&

KWEBER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 6, 8:22 AM CST	Areal Flood Warning	HUN	DeKalb, Marshall	3 hr
Jan 6, 8:51 AM CST	River Flood Warning	HUN	Jackson, Madison, Marshall	3 days
Jan 6, 8:52 AM CST	River Flood Watch	HUN	Madison	3 hr
Jan 6, 8:52 AM CST	River Flood Watch	HUN	Lawrence	5 hr
Jan 6, 12:00 PM CST	River Flood Warning	HUN	Madison	32 hr
Jan 6, 12:26 PM CST	Flash Flood Warning	HUN	Madison	4 hr
Jan 6, 1:35 PM CST	River Flood Warning	HUN	Lawrence	56 hr
Jan 6, 1:45 PM CST	Flash Flood Warning	HUN	Jackson, Lawrence, Limestone, Madison, Morgan	3 hr
Jan 6, 1:51 PM CST	Severe Thunderstorm Warning	HUN	DeKalb	24 min
Jan 6, 1:53 PM CST	Tornado Warning	HUN	DeKalb	37 min
Jan 6, 3:13 PM CST	Flash Flood Warning	HUN	DeKalb	6 hr
Jan 6, 3:20 PM CST	Tornado Warning	HUN	DeKalb	25 min
Jan 6, 4:26 PM CST	Flash Flood Warning	HUN	Cullman, DeKalb, Jackson, Lawrence, Limestone, Madison and 2 more	7 hr

Nearby

Flash Flood Warnings in Alabama, 2009 Every flash 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.