Alert archive / Alabama / River Flood Warnings in 2020

River Flood Warning 28, NWS Huntsville, AL

April 12, 2020Lawrence County, Alabama

NWS Huntsville, AL issued this river flood warning at Apr 12, 2020, 9:21 AM CDT for Lawrence County, Alabama. It took effect at Apr 13, 2020, 1:50 AM CDT. It was in force for 54 hr.

The area

The counties it named.

The facts

Issued
Apr 12, 2020, 9:21 AM CDT (14:21 UTC)
In effect from
Apr 13, 2020, 1:50 AM CDT
Expired
Apr 15, 2020, 8:18 AM CDT
In force
54 hr
Issued by
NWS Huntsville, AL
Area
Storm-based polygon
Flood severity
Minor

County Lawrence County, AL

The radar

The Columbus AFB radar (KGWX), 117 km from the middle of the area, began a volume at 14:23 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 river

Written for the forecast point Big Nance Creek (AL) at Courtland (BNAA1). The gauge peaked at 19.21 ft at Apr 14, 2020, 5:00 AM CDT.

actionminormoderatemajor510152004/1204/1304/1404/1504/16
Action stage
12 ft
Minor stage
14 ft
Moderate stage
16 ft
Major stage
19 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 03586500, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river 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 river flood warning went out at Apr 12, 9:07 AM CDT, 14 minutes earlier.

Area forecast discussion, Apr 12, 9:07 AM CDT, 14 minutes before
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Hazardous weather outlook, Apr 12, 3:38 AM CDT, 5 hours 43 minutes before
Hazardous Weather Outlook
National Weather Service Huntsville AL
338 AM CDT Sun Apr 12 2020

ALZ001>010-016-TNZ076-096-097-122300-
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN-
338 AM CDT Sun Apr 12 2020

This Hazardous Weather Outlook is for north Alabama and portions of
southern middle Tennessee.

.DAY ONE...Today and Tonight...

A severe weather outbreak is possible across the Tennessee Valley
region this afternoon and evening. All modes of severe weather will
be possible, including tornadoes, damaging winds and large hail.

Excessive rainfall of 2 to 3 inches, with a few areas receiving 4 to
5 inches, will result in an elevated threat of flash flooding. A
Flash Flood Watch is in effect from Noon through Midnight.

A Wind Advisory is in effect from Noon through Midnight, with
sustained winds of 15 to 25 mph and gusts of 35 to 40 mph,
particularly in the higher elevations.

.DAYS TWO THROUGH SEVEN...Monday through Saturday...

No hazardous weather is expected at this time.

Rises on area rivers, creeks, and streams may produce flooding
this week as a result of rainfall on Sunday and Sunday night.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management personnel is
expected this afternoon and evening.

Please relay any information about observed severe weather to the
National Weather Service while following all local, state, and CDC
guidelines.

In the hours before

Special weather statement, Apr 12, 8:13 AM CDT, 1 hour 8 minutes before
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Special weather statement, Apr 12, 8:53 AM CDT, 28 minutes before
Special Weather Statement
National Weather Service Huntsville AL
853 AM CDT Sun Apr 12 2020

ALZ001>003-121430-
Lauderdale AL-Franklin AL-Colbert AL-
853 AM CDT Sun Apr 12 2020

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL LAUDERDALE...COLBERT AND
NORTHWESTERN FRANKLIN COUNTIES UNTIL 930 AM CDT...

At 852 AM CDT, Doppler radar was tracking a strong thunderstorm 7
miles east of Tishomingo State Park, moving northeast at 55 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Florence, Muscle Shoals, Sheffield, Tuscumbia, Killen, Cherokee, St.
Florian, Underwood-Petersville, Malone and Posey Loop.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike several miles away from a thunderstorm. Seek a
safe shelter inside a building or vehicle.

&&

LAT...LON 3480 8810 3501 8766 3500 8764 3476 8746
      3455 8780 3448 8794 3446 8815
TIME...MOT...LOC 1352Z 241DEG 49KT 3465 8806

RSB

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 12, 3:36 AM CDTFlash Flood WatchHUNColbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more24 hr
Apr 12, 8:13 AM CDTSpecial Weather StatementHUNColbert17 min
Apr 12, 8:53 AM CDTSpecial Weather StatementHUNColbert, Lauderdale37 min
Apr 12, 9:22 AM CDTSpecial Weather StatementHUNLauderdale23 min
Apr 12, 9:46 AM CDTSpecial Weather StatementHUNColbert, Lauderdale29 min
Apr 12, 12:48 PM CDTSpecial Weather StatementHUNColbert, Franklin, Lauderdale42 min
Apr 12, 1:33 PM CDTSpecial Weather StatementHUNColbert, Lauderdale27 min
Apr 12, 2:48 PM CDTFlash Flood WarningHUNColbert, Lauderdale3 hr
Apr 12, 3:35 PM CDTSevere Thunderstorm WarningHUNFranklin55 min
Apr 12, 4:04 PM CDTSpecial Weather StatementHUNLimestone41 min
Apr 12, 4:19 PM CDTSpecial Weather StatementHUNLawrence26 min
Apr 12, 4:42 PM CDTSpecial Weather StatementHUNLawrence, Limestone, Madison, Morgan63 min
Apr 12, 5:18 PM CDTSpecial Weather StatementHUNCullman42 min
Apr 12, 5:27 PM CDTSevere Thunderstorm WarningHUNCullman33 min
Apr 12, 5:39 PM CDTAreal Flood WarningHUNColbert, Lauderdale3 hr
Apr 12, 6:02 PM CDTAreal Flood WarningHUNLawrence, Limestone, Morgan12 hr
Apr 12, 6:24 PM CDTTornado Warning Tornado observedHUNDeKalb, Marshall36 min
Apr 12, 6:31 PM CDTAreal Flood WarningHUNMadison12 hr
Apr 12, 6:52 PM CDTFlash Flood WarningHUNDeKalb, Marshall3 hr

Nearby

River Flood Warnings in Alabama, 2020Every river flood warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.