Alert archive / Alabama / Areal Flood Warnings in 2021

Areal Flood Warning 28, NWS Huntsville, AL

June 9, 20214 counties in Alabama

NWS Huntsville, AL issued this areal flood warning at Jun 9, 2021, 12:28 PM CDT for 4 counties in Alabama. It was in force for 3 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: Jun 9, 2021, 12:28 PM CDT (17:28 UTC)
Expired: Jun 9, 2021, 3:30 PM CDT
In force: 3 hr
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Flood severity: None

Counties Colbert County, AL, Franklin County, AL, Lauderdale County, AL, Lawrence County, AL

The radar

The Columbus AFB radar (KGWX), 103 km from the middle of the area, began a volume at 17:29 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, 5.5 hours before the alert went out and 181 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: 714 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 547 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: -5 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 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 areal flood warning went out at Jun 9, 10:01 AM CDT, 2 hours 27 minutes earlier.

Area forecast discussion, Jun 9, 10:01 AM CDT, 2 hours 27 minutes before

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Hazardous weather outlook, Jun 9, 11:12 AM CDT, 1 hour 16 minutes before

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In the hours before

Special weather statement, Jun 9, 6:47 AM CDT, 5 hours 41 minutes before

Special Weather Statement
National Weather Service Huntsville AL
647 AM CDT Wed Jun 9 2021

TNZ076-097-091215-
Franklin TN-Moore TN-
647 AM CDT Wed Jun 9 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MOORE AND NORTHERN
FRANKLIN COUNTIES UNTIL 715 AM CDT...

At 647 AM CDT, Doppler radar was tracking a strong thunderstorm near
Estill Springs, or 8 miles northwest of Winchester, moving northeast
at 35 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Winchester, Decherd, Estill Springs, Tims Ford Lake, Sewanee, Woods
Reservoir, Harmony, Arnold AFB and Alto.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Strong gusty winds will be capable of knocking down small tree limbs
along with other small unsecured items. Seek safe shelter until this
storm has passed.

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

&&

LAT...LON 3539 8628 3538 8625 3537 8627 3534 8624
      3535 8622 3533 8620 3536 8617 3535 8616
      3536 8616 3534 8603 3531 8600 3532 8598
      3529 8592 3523 8588 3513 8626 3536 8636
      3536 8633 3541 8626
TIME...MOT...LOC 1147Z 243DEG 30KT 3530 8618

AMP

Special weather statement, Jun 9, 8:24 AM CDT, 4 hours 4 minutes before

Special Weather Statement
National Weather Service Huntsville AL
824 AM CDT Wed Jun 9 2021

ALZ006-008>010-TNZ097-091415-
Marshall AL-Madison AL-DeKalb AL-Jackson AL-Franklin TN-
824 AM CDT Wed Jun 9 2021

...SIGNIFICANT WEATHER ADVISORY FOR JACKSON...NORTHEASTERN
MARSHALL...EASTERN MADISON...NORTHEASTERN DEKALB AND SOUTHEASTERN
FRANKLIN COUNTIES UNTIL 915 AM CDT...

At 824 AM CDT, Doppler radar was tracking a strong thunderstorm near
Scottsboro, moving northeast at 40 mph.

Winds in excess of 35 mph will be possible with this storm.

Locations impacted include...
Scottsboro, Bridgeport, Henagar, Stevenson, Hollywood, Grant,
Skyline, Section, Woodville and Ider.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Gusty winds will be capable of knocking down small tree limbs along
with other small unsecured items. Seek safe shelter until this storm
has passed.

&&

LAT...LON 3440 8618 3478 8637 3500 8606 3500 8586
      3499 8586 3499 8561 3477 8556
TIME...MOT...LOC 1324Z 234DEG 33KT 3464 8612

Special weather statement, Jun 9, 11:09 AM CDT, 1 hour 19 minutes before

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Special weather statement, Jun 9, 11:57 AM CDT, 31 minutes before

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Local storm report, Jun 9, 12:15 PM CDT, 13 minutes before

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Special weather statement, Jun 9, 12:23 PM CDT, 5 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 7:10 PM CDT	Special Weather Statement	HUN	Madison	35 min
Jun 8, 8:27 PM CDT	Special Weather Statement	HUN	Jackson	33 min
Jun 9, 2:18 AM CDT	Special Weather Statement	HUN	Colbert, Franklin	42 min
Jun 9, 5:27 AM CDT	Special Weather Statement	HUN	Limestone	48 min
Jun 9, 8:24 AM CDT	Special Weather Statement	HUN	Jackson	51 min
Jun 9, 9:12 AM CDT	Flash Flood Watch	HUN	Colbert, Cullman, Franklin, Lauderdale, Lawrence, Marshall and 1 more	10 hr
Jun 9, 11:09 AM CDT	Special Weather Statement	HUN	DeKalb	51 min
Jun 9, 11:25 AM CDT	Flash Flood Warning	HUN	DeKalb, Marshall	2 hr
Jun 9, 11:57 AM CDT	Special Weather Statement	HUN	DeKalb	48 min
Jun 9, 12:23 PM CDT	Special Weather Statement	HUN	Lawrence, Morgan	52 min
Jun 9, 5:14 PM CDT	Special Weather Statement	HUN	DeKalb	46 min
Jun 9, 6:11 AM CDT	Special Weather Statement	HUN	Franklin, Lincoln	49 min
Jun 9, 6:47 AM CDT	Special Weather Statement	HUN	Franklin	28 min

Nearby

Areal Flood Warnings in Alabama, 2021 Every areal 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.