Alert archive / Alabama / Flash Flood Watches in 2021
Flash Flood Watch 3, NWS Huntsville, AL
NWS Huntsville, AL issued this flash flood watch at Mar 24, 2021, 1:43 PM CDT for 11 counties in Alabama; Franklin County, Lincoln County, Moore County, Tennessee. It took effect at Mar 25, 2021, 1:00 AM CDT. It was in force for 22 hr.
The area
The counties it named.
The facts
- Issued
- Mar 24, 2021, 1:43 PM CDT (18:43 UTC)
- In effect from
- Mar 25, 2021, 1:00 AM CDT
- Expired
- Mar 25, 2021, 11:03 PM CDT
- In force
- 22 hr
- Issued by
- NWS Huntsville, AL
- Flood severity
- None
Counties Colbert County, AL, Cullman County, AL, DeKalb County, AL, Franklin County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL, Franklin County, TN, Lincoln County, TN, Moore County, TN
The radar
The Northeast Alabama radar (KHTX), 69 km from the middle of the area, began a volume at 18:46 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
Nashville Metro, TN (KBNA), launched 12:00Z, 6.7 hours before the alert went out and 159 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 700 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 199 m²/s²
- 0-3 km storm-relative helicity
- 304 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
892 WGUS64 KHUN 241843 FFAHUN URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Huntsville AL 143 PM CDT Wed Mar 24 2021 ALZ001>010-016-TNZ076-096-097-250745- /O.NEW.KHUN.FF.A.0003.210325T0600Z-210326T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN- Including the cities of Russellville, Winchester, Fort Payne, Red Bay, Cullman, Town Creek, Cowan, Estill Springs, Huntsville, Sheffield, Arab, Sewanee, Decatur, Lynchburg, Athens, Muscle Shoals, Decherd, Fayetteville, Albertville, Guntersville, Boaz, Rainsville, Tuscumbia, Moulton, Florence, and Scottsboro 143 PM CDT Wed Mar 24 2021 ...FLASH FLOOD WATCH IN EFFECT FROM 1 AM CDT THURSDAY THROUGH LATE THURSDAY NIGHT... The National Weather Service in Huntsville has issued a * Flash Flood Watch for portions of Alabama and southern middle Tennessee, including the following areas, in Alabama, Colbert, Cullman, DeKalb, Franklin AL, Jackson, Lauderdale, Lawrence, Limestone, Madison, Marshall and Morgan. In southern middle Tennessee, Franklin TN, Lincoln and Moore. * From 1 AM CDT Thursday through late Thursday night * Widespread heavy rainfall is forecast early Thursday morning as a warm front lifts northwards through the Tennessee Valley. This round of rain will produce 1 to 2 inches of rainfall across the area. This event will saturate the soils across the area. Another round of heavy rainfall is forecast later Thursday afternoon as severe storms approach from the west. These storms will be proficient rain producers. This additional rainfall will exacerbate any ongoing issues and lead to additional flooding issues Thursday afternoon and evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ MA
4 follow-up statements
982 WGUS64 KHUN 250809 FFAHUN Flood Watch National Weather Service Huntsville AL 309 AM CDT Thu Mar 25 2021 ALZ001>010-016-TNZ076-096-097-251615- /O.CON.KHUN.FF.A.0003.000000T0000Z-210326T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN- Including the cities of Florence, Muscle Shoals, Sheffield, Tuscumbia, Russellville, Red Bay, Moulton, Town Creek, Athens, Huntsville, Decatur, Albertville, Boaz, Guntersville, Arab, Scottsboro, Fort Payne, Rainsville, Cullman, Lynchburg, Fayetteville, Winchester, Sewanee, Decherd, Estill Springs, and Cowan 309 AM CDT Thu Mar 25 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch continues for * Portions of Alabama and southern middle Tennessee, including the following areas, in Alabama, Colbert, Cullman, DeKalb, Franklin AL, Jackson, Lauderdale, Lawrence, Limestone, Madison, Marshall, and Morgan. In southern middle Tennessee, Franklin TN, Lincoln, and Moore. * Now through 1 AM Friday morning. * Multiple rounds of heavy rainfall from through 1 AM CDT Friday will cause excessive rainfall amounts of 2 to 4 inches, with locally higher amounts possible. * Heavy rainfall will cause excess runoff and flash flooding in the watch area. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
717 WGUS64 KHUN 251707 FFAHUN Flood Watch National Weather Service Huntsville AL 1207 PM CDT Thu Mar 25 2021 ALZ001>010-016-TNZ076-096-097-260115- /O.CON.KHUN.FF.A.0003.000000T0000Z-210326T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN- Including the cities of Russellville, Winchester, Fort Payne, Red Bay, Cullman, Town Creek, Cowan, Estill Springs, Huntsville, Sheffield, Arab, Sewanee, Decatur, Lynchburg, Athens, Muscle Shoals, Decherd, Fayetteville, Albertville, Guntersville, Boaz, Rainsville, Tuscumbia, Moulton, Florence, and Scottsboro 1207 PM CDT Thu Mar 25 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch continues for * Portions of Alabama and southern middle Tennessee, including the following areas, in Alabama, Colbert, Cullman, DeKalb, Franklin AL, Jackson, Lauderdale, Lawrence, Limestone, Madison, Marshall and Morgan. In southern middle Tennessee, Franklin TN, Lincoln and Moore. * Through late tonight * Widespread rainfall this morning has saturated the soils across North Alabama and Southern Middle Tennessee. Another round of storms is forecast this afternoon and evening. These storms will produce heavy rainfall with an additional 1 to 2 inches of rainfall possible. This will exacerbate any ongoing flooding issues and lead to additional flooding issues. The flash flood watch continues through tonight. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ MA
534 WGUS64 KHUN 260110 FFAHUN Flood Watch National Weather Service Huntsville AL 810 PM CDT Thu Mar 25 2021 ALZ001>010-016-TNZ076-096-097-260600- /O.CON.KHUN.FF.A.0003.000000T0000Z-210326T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN- Including the cities of Russellville, Winchester, Fort Payne, Red Bay, Cullman, Town Creek, Cowan, Estill Springs, Huntsville, Sheffield, Arab, Sewanee, Decatur, Lynchburg, Athens, Muscle Shoals, Decherd, Fayetteville, Albertville, Guntersville, Boaz, Rainsville, Tuscumbia, Moulton, Florence, and Scottsboro 810 PM CDT Thu Mar 25 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 1 AM CDT FRIDAY... The Flash Flood Watch continues for * Portions of Alabama and southern middle Tennessee, including the following areas, in Alabama, Colbert, Cullman, DeKalb, Franklin AL, Jackson, Lauderdale, Lawrence, Limestone, Madison, Marshall and Morgan. In southern middle Tennessee, Franklin TN, Lincoln and Moore. * Until 1 AM CDT Friday * A secondary band of moderate to heavy showers and thunderstorms will sweep eastward across the Tennessee Valley this evening with a cold front. The additional rainfall will aggravate pre-existing flooding issues across the region, and could enhance the threat for flash flooding once again. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ 70/DD
622 WGUS64 KHUN 260403 FFAHUN Flood Watch National Weather Service Huntsville AL 1103 PM CDT Thu Mar 25 2021 ALZ001>010-016-TNZ076-096-097-260515- /O.CAN.KHUN.FF.A.0003.000000T0000Z-210326T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN- Including the cities of Russellville, Winchester, Fort Payne, Red Bay, Cullman, Town Creek, Cowan, Estill Springs, Huntsville, Sheffield, Arab, Sewanee, Decatur, Lynchburg, Athens, Muscle Shoals, Decherd, Fayetteville, Albertville, Guntersville, Boaz, Rainsville, Tuscumbia, Moulton, Florence, and Scottsboro 1103 PM CDT Thu Mar 25 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of Alabama and southern middle Tennessee, including the following areas, in Alabama, Colbert, Cullman, DeKalb, Franklin AL, Jackson, Lauderdale, Lawrence, Limestone, Madison, Marshall and Morgan. In southern middle Tennessee, Franklin TN, Lincoln and Moore has been cancelled. A couple of bands of light to moderate showers will shift eastward across northeast Alabama late this evening, ahead of a cold front. However, the rainfall is not expected to result in additional flash flooding and the Flood Watch has been cancelled. Although flooding is no longer expected to pose a threat, please continue to heed remaining road closures. $$ 70/DD
The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 24, 9:32 AM CDT | River Flood Warning | HUN | Jackson, Madison, Marshall | 9 days |
| Mar 24, 9:34 AM CDT | River Flood Warning | HUN | Madison | 47 hr |
Nearby
Flash Flood Watches in Alabama, 2021Flash Flood Watches in Tennessee, 2021Every flash flood watch 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.