Alert archive / Alabama / Freeze Warnings in 2021

Freeze Warning 2, NWS Huntsville, AL

March 31, 2021Franklin County, Lincoln County, Moore County, Tennessee; 11 counties in Alabama

NWS Huntsville, AL issued this freeze warning at Mar 31, 2021, 1:52 PM CDT for Franklin County, Lincoln County, Moore County, Tennessee; 11 counties in Alabama. It took effect at Apr 2, 2021, 12:00 AM CDT. 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 31, 2021, 1:52 PM CDT (18:52 UTC)
In effect from
Apr 2, 2021, 12:00 AM CDT
Expired
Apr 2, 2021, 8:00 AM CDT
In force
8 hr
Issued by
NWS Huntsville, AL

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 18:55 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, 6.9 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.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2021-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2021-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
498 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

591 
WWUS74 KHUN 311852
NPWHUN

URGENT - WEATHER MESSAGE
National Weather Service Huntsville AL
152 PM CDT Wed Mar 31 2021

TNZ076-096-097-010900-
/O.NEW.KHUN.FZ.W.0001.210401T0900Z-210401T1200Z/
/O.NEW.KHUN.FZ.W.0002.210402T0500Z-210402T1300Z/
Moore-Lincoln-Franklin TN-
Including the cities of Lynchburg, Fayetteville, Winchester, 
Sewanee, Decherd, Estill Springs, and Cowan
152 PM CDT Wed Mar 31 2021

...FREEZE WARNING IN EFFECT FROM 4 AM TO 7 AM CDT THURSDAY...
...FREEZE WARNING IN EFFECT FROM MIDNIGHT THURSDAY NIGHT TO 8 AM
CDT FRIDAY...

* WHAT...For the first Freeze Warning, sub-freezing temperatures 
  as low as 31 expected. For the second Freeze Warning, sub- 
  freezing temperatures as low as 27 expected.

* WHERE...Moore, Lincoln and Franklin Counties.

* WHEN...For the first Freeze Warning, from 4 AM to 7 AM CDT 
  Thursday. For the second Freeze Warning, from midnight 
  Thursday night to 8 AM CDT Friday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

ALZ001>010-016-010900-
/O.NEW.KHUN.FZ.A.0001.210402T0500Z-210402T1300Z/
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
Marshall-Jackson-DeKalb-Cullman-
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, and Cullman
152 PM CDT Wed Mar 31 2021

...FREEZE WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
MORNING...

* WHAT...Sub-freezing temperatures as low as 28 possible.

* WHERE...Portions of north central, northeast and northwest 
  Alabama.

* WHEN...From late Thursday night through Friday morning.

* IMPACTS...Frost and freeze conditions could kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$
7 follow-up statements
340 
WWUS74 KHUN 010154
NPWHUN

URGENT - WEATHER MESSAGE
National Weather Service Huntsville AL
854 PM CDT Wed Mar 31 2021

TNZ076-096-097-011100-
/O.CON.KHUN.FZ.W.0001.210401T0900Z-210401T1200Z/
/O.CON.KHUN.FZ.W.0002.210402T0500Z-210402T1300Z/
Moore-Lincoln-Franklin TN-
Including the cities of Lynchburg, Fayetteville, Winchester, 
Sewanee, Decherd, Estill Springs, and Cowan
854 PM CDT Wed Mar 31 2021

...FREEZE WARNING REMAINS IN EFFECT FROM 4 AM TO 7 AM CDT
THURSDAY...
...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT THURSDAY NIGHT
TO 8 AM CDT FRIDAY...

* WHAT...For the first Freeze Warning, sub-freezing temperatures 
  as low as 31 expected. For the second Freeze Warning, sub- 
  freezing temperatures as low as 27 expected.

* WHERE...Moore, Lincoln and Franklin Counties.

* WHEN...For the first Freeze Warning, from 4 AM to 7 AM CDT 
  Thursday. For the second Freeze Warning, from midnight 
  Thursday night to 8 AM CDT Friday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

ALZ001>010-016-011100-
/O.CON.KHUN.FZ.A.0001.210402T0500Z-210402T1300Z/
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
Marshall-Jackson-DeKalb-Cullman-
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, and Cullman
854 PM CDT Wed Mar 31 2021

...FREEZE WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT
THROUGH FRIDAY MORNING...

* WHAT...Sub-freezing temperatures as low as 28 possible.

* WHERE...Portions of north central, northeast and northwest 
  Alabama.

* WHEN...From late Thursday night through Friday morning.

* IMPACTS...Frost and freeze conditions could kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$
348 
WWUS74 KHUN 010730
NPWHUN

URGENT - WEATHER MESSAGE
National Weather Service Huntsville AL
230 AM CDT Thu Apr 1 2021

ALZ001>010-016-012100-
/O.UPG.KHUN.FZ.A.0001.210402T0500Z-210402T1300Z/
/O.EXA.KHUN.FZ.W.0002.210402T0500Z-210402T1300Z/
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
Marshall-Jackson-DeKalb-Cullman-
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, and Cullman
230 AM CDT Thu Apr 1 2021

...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM CDT
FRIDAY...

* WHAT...Sub-freezing temperatures as low as 27 expected.

* WHERE...Portions of north central, northeast and northwest 
  Alabama.

* WHEN...From midnight tonight to 8 AM CDT Friday.

* IMPACTS...Frost and freeze conditions could kill crops, other
  sensitive vegetation and possibly damage unprotected outdoor
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

TNZ076-096-097-012100-
/O.CON.KHUN.FZ.W.0001.210401T0900Z-210401T1200Z/
/O.CON.KHUN.FZ.W.0002.210402T0500Z-210402T1300Z/
Moore-Lincoln-Franklin TN-
Including the cities of Lynchburg, Fayetteville, Winchester, 
Sewanee, Decherd, Estill Springs, and Cowan
230 AM CDT Thu Apr 1 2021

...FREEZE WARNING REMAINS IN EFFECT UNTIL 7 AM CDT THIS MORNING...
...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM
CDT FRIDAY...

* WHAT...For the first Freeze Warning, sub-freezing temperatures 
  as low as 31 expected. For the second Freeze Warning, sub- 
  freezing temperatures as low as 27 expected.

* WHERE...Moore, Lincoln and Franklin Counties.

* WHEN...For the first Freeze Warning, from 4 AM to 7 AM CDT 
  Thursday. For the second Freeze Warning, from midnight 
  Thursday night to 8 AM CDT Friday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$
627 
WWUS74 KHUN 011325
NPWHUN

URGENT - WEATHER MESSAGE
National Weather Service Huntsville AL
825 AM CDT Thu Apr 1 2021

ALZ001>010-016-TNZ076-096-097-012200-
/O.CON.KHUN.FZ.W.0002.210402T0500Z-210402T1300Z/
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
825 AM CDT Thu Apr 1 2021

...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM
CDT FRIDAY...

* WHAT...Sub-freezing temperatures as low as 27 expected.

* WHERE...All of north Alabama and southern middle Tennessee.

* WHEN...From midnight tonight to 8 AM CDT Friday.

* IMPACTS...Frost and freeze conditions could kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$
086 
WWUS74 KHUN 011841
NPWHUN

URGENT - WEATHER MESSAGE
National Weather Service Huntsville AL
141 PM CDT Thu Apr 1 2021

TNZ076-096-097-020245-
/O.NEW.KHUN.FZ.W.0003.210403T0600Z-210403T1400Z/
/O.CON.KHUN.FZ.W.0002.210402T0500Z-210402T1300Z/
Moore-Lincoln-Franklin TN-
Including the cities of Lynchburg, Fayetteville, Winchester, 
Sewanee, Decherd, Estill Springs, and Cowan
141 PM CDT Thu Apr 1 2021

...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM
CDT FRIDAY...
...FREEZE WARNING IN EFFECT FROM 1 AM TO 9 AM CDT SATURDAY...

* WHAT...For the first Freeze Warning, sub-freezing temperatures 
  as low as 25 expected. For the second Freeze Warning, sub- 
  freezing temperatures as low as 29 expected.

* WHERE...Moore, Lincoln and Franklin Counties in Tennessee.

* WHEN...For the first Freeze Warning, from midnight tonight to 
  8 AM CDT Friday. For the second Freeze Warning, from 1 AM to 9 
  AM CDT Saturday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

ALZ001>010-016-020245-
/O.NEW.KHUN.FZ.A.0002.210403T0600Z-210403T1400Z/
/O.CON.KHUN.FZ.W.0002.210402T0500Z-210402T1300Z/
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
Marshall-Jackson-DeKalb-Cullman-
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, and Cullman
141 PM CDT Thu Apr 1 2021

...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM
CDT FRIDAY...
...FREEZE WATCH IN EFFECT FROM LATE FRIDAY NIGHT THROUGH SATURDAY
MORNING...

* WHAT...For the Freeze Warning, sub-freezing temperatures as 
  low as 27 expected. For the Freeze Watch, sub-freezing 
  temperatures as low as 30 possible.

* WHERE...All of northern Alabama.

* WHEN...For the Freeze Warning, from midnight tonight to 8 AM 
  CDT Friday. For the Freeze Watch, from late Friday night 
  through Saturday morning.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$
870 
WWUS74 KHUN 020126
NPWHUN

URGENT - WEATHER MESSAGE
National Weather Service Huntsville AL
826 PM CDT Thu Apr 1 2021

TNZ076-096-097-021200-
/O.CON.KHUN.FZ.W.0002.210402T0500Z-210402T1300Z/
/O.CON.KHUN.FZ.W.0003.210403T0600Z-210403T1400Z/
Moore-Lincoln-Franklin TN-
Including the cities of Lynchburg, Fayetteville, Winchester, 
Sewanee, Decherd, Estill Springs, and Cowan
826 PM CDT Thu Apr 1 2021

...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM
CDT FRIDAY...
...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 9 AM CDT
SATURDAY...

* WHAT...For the Freeze Warning in effect for tonight, sub-
  freezing temperatures as low as 25 expected. For the Freeze
  Warning in effect Friday night into Saturday morning, sub-
  freezing temperatures as low as 29 expected.

* WHERE...Moore, Lincoln and Franklin Counties in Tennessee.

* WHEN...Midnight tonight to 8 AM CDT Friday morning, and again 
  from 1 AM to 9 AM CDT Saturday morning.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

ALZ001>010-016-021200-
/O.CON.KHUN.FZ.W.0002.210402T0500Z-210402T1300Z/
/O.CON.KHUN.FZ.A.0002.210403T0600Z-210403T1400Z/
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
Marshall-Jackson-DeKalb-Cullman-
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, and Cullman
826 PM CDT Thu Apr 1 2021

...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM
CDT FRIDAY...
...FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH
SATURDAY MORNING...

* WHAT...For the Freeze Warning in effect for tonight, sub-
  freezing temperatures as low as 27 expected. For the Freeze
  Watch in effect for Friday night, sub-freezing temperatures as 
  low as 30 possible.

* WHERE...All of northern Alabama.

* WHEN...For the Freeze Warning, from midnight tonight to 8 AM CDT
  Friday. For the Freeze Watch, from 1 AM to 9 AM Saturday 
  morning.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$
846 
WWUS74 KHUN 020906
NPWHUN

URGENT - WEATHER MESSAGE
National Weather Service Huntsville AL
406 AM CDT Fri Apr 2 2021

ALZ001>010-016-021800-
/O.UPG.KHUN.FZ.A.0002.210403T0600Z-210403T1400Z/
/O.EXA.KHUN.FZ.W.0003.210403T0600Z-210403T1400Z/
/O.CON.KHUN.FZ.W.0002.000000T0000Z-210402T1300Z/
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
Marshall-Jackson-DeKalb-Cullman-
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, and Cullman
406 AM CDT Fri Apr 2 2021

...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING...
...FREEZE WARNING IN EFFECT FROM 1 AM TO 9 AM CDT SATURDAY...

* WHAT...Low temperatures this morning should be as cold as 27
  degrees. For Saturday morning, temperatures as low as 30 degrees
  are expected.

* WHERE...Portions of north central, northeast and northwest 
  Alabama.

* WHEN...A Freeze Warning remains in effect until 8 AM CDT this 
  morning. Another Freeze Warning will be in effect from 1 AM to 9
  AM CDT Saturday morning.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

TNZ076-096-097-021800-
/O.CON.KHUN.FZ.W.0002.000000T0000Z-210402T1300Z/
/O.CON.KHUN.FZ.W.0003.210403T0600Z-210403T1400Z/
Moore-Lincoln-Franklin TN-
Including the cities of Lynchburg, Fayetteville, Winchester, 
Sewanee, Decherd, Estill Springs, and Cowan
406 AM CDT Fri Apr 2 2021

...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING...
...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 9 AM CDT
SATURDAY...

* WHAT...Low temperatures this morning should be as low as 25
  degrees. For Saturday morning, temperatures as low as 29 degrees
  are expected.

* WHERE...Moore, Lincoln and Franklin Counties in Tennessee.

* WHEN...A Freeze Warning remain in effect until 8 AM CDT this 
  morning. Another Freeze Warning will be in effect from 1 AM to 9
  AM CDT Saturday morning.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$
019 
WWUS74 KHUN 021322
NPWHUN

URGENT - WEATHER MESSAGE
National Weather Service Huntsville AL
822 AM CDT Fri Apr 2 2021

ALZ001>010-016-TNZ076-096-097-022130-
/O.EXP.KHUN.FZ.W.0002.000000T0000Z-210402T1300Z/
/O.CON.KHUN.FZ.W.0003.210403T0600Z-210403T1400Z/
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
822 AM CDT Fri Apr 2 2021

...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 9 AM CDT
SATURDAY...

* WHAT...Sub-freezing temperatures as low as 29 expected.

* WHERE...All of northern Alabama and southern Middle Tennessee.

* WHEN...A Freeze Warning will be in effect from 1 AM to 9 AM CDT
  Saturday morning.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

What forecasters said that day

The local office's own words before this freeze 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 freeze warning went out at Mar 31, 1:52 PM CDT, 0 minutes earlier.

Area forecast discussion, Mar 31, 1:52 PM CDT, 0 minutes before
Area Forecast Discussion
National Weather Service Huntsville AL
152 PM CDT Wed Mar 31 2021

.NEAR TERM...(Tonight)
Issued at 152 PM CDT Wed Mar 31 2021

The powerful upper trof axis will drop southeast through the OH and
TN valley overnight. Strong cold advection is underway with gusty
north flow this afternoon. Winds will drop some this evening, and may
be enough to prevent frost development for most areas. After
coordination with OHX, have opted to issue a Freeze Warning in our
three southern TN counties from 4-7 am.  We may see a couple spots
reach 32 or so in our colder north Alabama areas, but most likely for
an hour or less. Ongoing flood issues continue, with areal flood
warnings in effect this afternoon, and river flood warnings for
various points.

.SHORT TERM...(Thursday through Friday)
Issued at 152 PM CDT Wed Mar 31 2021

Thursday will be quite chilly for April. North flow will be quite
gusty again, gusting over 20kt through the day, and highs will only
reach around 50 in valley areas, and only the lower to middle 40s
atop the Cumberland Plateau. As the center of the Arctic high drops
southeast into the lower OH valley, wind flow will subside.
A hard freeze is expected Thursday night into Friday morning. Temperatures
will drop into the lower to middle 20s with a hard freeze expected.
Have hoisted a Freeze Warning for Southern TN and a Freeze Watch for
north Alabama. This will likely be upgraded to a Freeze Warning
Thursday. Highs will warm a bit more on Friday with wind flow
diminishing. Highs will warm into the lower 50s for most valley
areas, with upper 40s atop the Cumberland Plateau.

.LONG TERM...(Friday night through Tuesday)
Issued at 152 PM CDT Wed Mar 31 2021

A broad area of high pressure locks into place over the Southeast
over the weekend, leading to very tranquil weather over the weekend
into early next week. This will be a much needed break in the
rain/severe weather after what we've had over the last couple weeks.

Friday night into Saturday morning, we will still be fairly cold,
though with the surface high shifting more to the east, this will
lead to flow gradually shifting to the southeast overnight. This
should help us stay a little warmer, with lows only dropping to
around 30 degrees, a few degrees warmer than Friday morning. Saturday
during the day will start our warming trend, as southerly flow
becomes more dominant over Alabama and Middle Tennessee. Highs on
Saturday will get back up into the 60s, and then we're looking at
highs up around 70 on Sunday. As we go into early next week, sunshine
will continue to prevail, with highs getting up into the low-to-mid
70s on Monday, and upper 70s on Tuesday.

&&

.AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon)
Issued at 1154 AM CDT Wed Mar 31 2021

Ceilings ~015agl (MVFR) should exit the KHSV by 20Z. Ceilings of
030-040agl (VFR) will persist at KHSV and KMSL through 02Z-04Z before
clearing. North to north winds of 13-15kt will gust around 25kt at
times through 02Z then diminish to around 10-12kt. Winds will
increase again by 14Z/01 with gusts again at 20-25kt.

&&

.HUN WATCHES/WARNINGS/ADVISORIES...
AL...Freeze Watch from late Thursday night through Friday morning for
     ALZ001>010-016.

TN...Freeze Warning from 4 AM to 7 AM CDT Thursday for TNZ076-096-097.

     Freeze Warning from midnight Thursday night to 8 AM CDT Friday for
     TNZ076-096-097.

&&

NEAR TERM...17
SHORT TERM...17
LONG TERM...McCoy
AVIATION...17

For more information please visit our website
at weather.gov/huntsville.
Hazardous weather outlook, Mar 31, 3:21 AM CDT, 10 hours 31 minutes before
Hazardous Weather Outlook
National Weather Service Huntsville AL
321 AM CDT Wed Mar 31 2021

ALZ001>010-016-TNZ076-096-097-312330-
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN-
321 AM CDT Wed Mar 31 2021

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

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

Widespread heavy rainfall is expected today across the forecast area.
Rainfall amounts of 1 to 3 inches with locally higher amounts will
lead to flash flooding and continued rises along area rivers and
streams. A flash flood watch continues until 7 PM this evening.

Additionally, strong to severe storms will be possible this morning
as a cold front approaches from the west. The main threat with these
storms will be damaging wind gusts.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday...

Unseasonably cold morning temperatures are forecast Thursday through
Saturday, with frost possible each morning. The coldest morning will
be Friday when a hard freeze is expected with lows in the mid 20s in
southern Tennessee and upper 20s to around 30 degrees in north
Alabama.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management personnel is
not anticipated at this time.

In the hours before

Local storm report, Mar 31, 9:31 AM CDT, 4 hours 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
931 AM CDT WED MAR 31 2021

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

0700 AM     FLASH FLOOD      1 ENE DECHERD           35.21N 86.08W
03/31/2021                   FRANKLIN           TN   EMERGENCY MNGR

            WATER COVERING NORTH 2ND STREET AND MILL
            STREET. ROADS IMPASSIBLE.

&&
Local storm report, Mar 31, 9:33 AM CDT, 4 hours 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
933 AM CDT WED MAR 31 2021

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

0700 AM     FLASH FLOOD      5 W WINCHESTER          35.18N 86.19W
03/31/2021                   FRANKLIN           TN   EMERGENCY MNGR

            WATER COVERING HIGHWAY 50 AT OWLS HOLLOW
            ROAD.

&&
Local storm report, Mar 31, 9:35 AM CDT, 4 hours 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
935 AM CDT WED MAR 31 2021

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

0745 AM     FLASH FLOOD      7 NE WOODVILLE          34.68N 86.19W
03/31/2021                   JACKSON            AL   EMERGENCY MNGR

            APPROXIMATELY 6 INCHES OF WATER COVERING
            COUNTY ROAD 30 IN MULTIPLE LOCATIONS,
            INCLUDING COUNTY ROAD 119.

&&
Local storm report, Mar 31, 9:38 AM CDT, 4 hours 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
938 AM CDT WED MAR 31 2021

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

0750 AM     FLASH FLOOD      3 W HOLLYWOOD           34.72N 86.03W
03/31/2021                   JACKSON            AL   EMERGENCY MNGR

            APPROXIMATELY 6 TO 8 INCHES OF WATER
            COVERING COUNTY ROAD 105 NEAR COUNTY ROAD
            21.

&&
Local storm report, Mar 31, 12:37 PM CDT, 1 hour 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1237 PM CDT WED MAR 31 2021

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

1232 PM     FLASH FLOOD      1 ENE STEVENSON         34.87N 85.82W
03/31/2021                   JACKSON            AL   EMERGENCY MNGR

            OLD MOUNT CARMEL ROAD HAS BEEN CLOSED DUE TO
            FLASH FLOODING.

&&

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 31, 3:14 AM CDTAreal Flood WarningHUNFranklin, Lincoln, Moore5 hr
Mar 31, 7:52 AM CDTFlash Flood WarningHUNFranklin, Lincoln, Moore3 hr
Mar 31, 10:51 AM CDTAreal Flood WarningHUNFranklin, Lincoln, Moore5 hr
Mar 31, 11:02 AM CDTRiver Flood WarningHUNFranklin, Lincoln22 hr
Mar 31, 1:52 PM CDTFreeze WarningHUNFranklin, Lincoln, Moore17 hr
Mar 31, 3:38 AM CDTSpecial Weather StatementHUNMarshall52 min
Mar 31, 3:56 AM CDTSpecial Weather StatementHUNMorgan49 min
Mar 31, 4:59 AM CDTAreal Flood WarningHUNJackson3 hr
Mar 31, 6:21 AM CDTAreal Flood WarningHUNCullman3 hr
Mar 31, 7:21 AM CDTFlash Flood WarningHUNCullman6 hr
Mar 31, 7:30 AM CDTFlash Flood WarningHUNJackson, Marshall4 hr
Mar 31, 7:36 AM CDTSpecial Weather StatementHUNCullman39 min
Mar 31, 8:49 AM CDTFlash Flood WarningHUNMadison, Marshall, Morgan3 hr
Mar 31, 9:41 AM CDTFlash Flood WarningHUNDeKalb, Jackson, Marshall119 min
Mar 31, 11:35 AM CDTAreal Flood WarningHUNDeKalb, Jackson, Madison, Marshall, Morgan6 hr
Mar 31, 1:06 PM CDTAreal Flood WarningHUNCullman5 hr
Mar 31, 1:42 PM CDTRiver Flood WarningHUNMadison, Marshall, Morgan55 hr
Mar 31, 1:52 PM CDTFreeze WatchHUNColbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more13 hr
Mar 31, 5:29 PM CDTAreal Flood WarningHUNDeKalb3 hr
Mar 31, 6:18 PM CDTAreal Flood WarningHUNCullman18 hr

Nearby

Freeze Warnings in Alabama, 2021Freeze Warnings in Tennessee, 2021Every freeze 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.