Alert archive / Alabama / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 68, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at Jul 30, 2021, 5:58 PM CDT for 4 counties in Alabama. It was in force for 32 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 30, 2021, 5:58 PM CDT (22:58 UTC)
- Expired
- Jul 30, 2021, 6:30 PM CDT
- In force
- 32 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Colbert County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL
The radar
The Northeast Alabama radar (KHTX), 119 km from the middle of the area, began a volume at 22:57 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 30, 6:07 PM CDT | TSTM WND DMG | 3 N Killen, AL | TREES AND POWER LINES WERE KNOCKED DOWN IN THE VICINITY OF CR 364 AND CR 36 IN THE GREEN HILL AREA. POWER OUTAGES ALSO REPORTED IN THIS AREA VIA SOCIAL MEDIA. |
| Jul 30, 6:07 PM CDT | TSTM WND DMG | 4 W Lexington, AL | TREES AND STRUCTURE DAMAGE ALONG 3/4 MILE STRETCH OF CR 33. SIX RESIDENCES WITH SIGNIFICANT DAMAGE, BUT NO ONE HURT. ROOF AND OUTBUILDING DAMAGE AND LARGE TREES DOWN. TIME ESTIMATED BY RADAR. |
| Jul 30, 6:07 PM CDT | TSTM WND DMG | Lexington, AL | TREES WERE KNOCKED DOWN ON A HOUSE IN THE LEXINGTON AND GREEN HILL AREA. TIME ESTIMATED BY RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 3 storm reports to this severe thunderstorm warning; the first came 9 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 11.0 hours before the alert went out and 157 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
- 1172 J/kg
- Mixed-layer CIN
- -120 J/kg
- Mixed-layer LCL
- 1038 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -91 m²/s²
- 0-3 km storm-relative helicity
- -6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
966
WUUS54 KHUN 302258
SVRHUN
ALC033-077-079-083-302330-
/O.NEW.KHUN.SV.W.0068.210730T2258Z-210730T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Huntsville AL
558 PM CDT Fri Jul 30 2021
The National Weather Service in Huntsville Alabama has issued a
* Severe Thunderstorm Warning for...
Eastern Lauderdale County in northwestern Alabama...
West central Limestone County in north central Alabama...
East central Colbert County in northwestern Alabama...
Northern Lawrence County in northwestern Alabama...
* Until 630 PM CDT.
* At 558 PM CDT, a severe thunderstorm was located near Lexington, or
16 miles northeast of Florence, moving southeast at 20 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Florence, Rogersville, Killen, Town Creek, Lexington, Leighton,
Courtland, St. Florian, North Courtland and Anderson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
&&
LAT...LON 3500 8728 3475 8705 3459 8743 3487 8767
3500 8759
TIME...MOT...LOC 2258Z 316DEG 18KT 3496 8745
HAIL...<.75IN
WIND...60MPH
$$
KTW2 follow-up statements
942
WWUS54 KHUN 302319
SVSHUN
Severe Weather Statement
National Weather Service Huntsville AL
619 PM CDT Fri Jul 30 2021
ALC033-302328-
/O.CAN.KHUN.SV.W.0068.000000T0000Z-210730T2330Z/
Colbert AL-
619 PM CDT Fri Jul 30 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL COLBERT COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3491 8720 3475 8705 3464 8732 3485 8742
3495 8733
TIME...MOT...LOC 2318Z 316DEG 18KT 3489 8736
$$
ALC077-079-083-302330-
/O.CON.KHUN.SV.W.0068.000000T0000Z-210730T2330Z/
Lauderdale AL-Limestone AL-Lawrence AL-
619 PM CDT Fri Jul 30 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR SOUTHEASTERN LAUDERDALE...WEST CENTRAL LIMESTONE AND NORTHEASTERN
LAWRENCE COUNTIES...
At 618 PM CDT, a severe thunderstorm was located near Lexington, or
18 miles east of Florence, moving southeast at 20 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Rogersville, Courtland, North Courtland, Anderson, Coxey, Oliver,
Whitehead, Red Bank, Elgin and Ripley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 3491 8720 3475 8705 3464 8732 3485 8742
3495 8733
TIME...MOT...LOC 2318Z 316DEG 18KT 3489 8736
HAIL...<.75IN
WIND...60MPH
$$
KTW995
WWUS54 KHUN 302328
SVSHUN
Severe Weather Statement
National Weather Service Huntsville AL
628 PM CDT Fri Jul 30 2021
ALC077-079-083-302338-
/O.EXP.KHUN.SV.W.0068.000000T0000Z-210730T2330Z/
Lauderdale AL-Limestone AL-Lawrence AL-
628 PM CDT Fri Jul 30 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LAUDERDALE...WEST
CENTRAL LIMESTONE AND NORTHEASTERN LAWRENCE COUNTIES WILL EXPIRE AT
630 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and frequent lightning are still possible with this
thunderstorm.
LAT...LON 3491 8720 3475 8705 3464 8732 3485 8742
3495 8733
TIME...MOT...LOC 2328Z 316DEG 18KT 3486 8733
$$What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jul 30, 5:12 PM CDT, 46 minutes earlier.
Area forecast discussion, Jul 30, 5:12 PM CDT, 46 minutes before
Area Forecast Discussion
National Weather Service Huntsville AL
512 PM CDT Fri Jul 30 2021
.UPDATE...
For 00Z TAFS.
&&
.NEAR TERM...(Tonight)
Issued at 512 PM CDT Fri Jul 30 2021
Strong heating and dew points in the middle to upper 70s has resulted
in MUCAPE values of 4000-5000 j/kg and dCAPE of ~1500 j/kg.
Clusters of deep convection have blossomed over the past two hours
along a pre-frontal convergence zone form southeast MO through north
GA. One cluster is dropping southeast through Cullman, Marshall and
Dekalb Counties. Another was dropping southeast through southern
middle TN. The main threats will be frequent lightning, possible
downburst winds and torrential rainfall. Have increased PoPs through
early this evening for these trends. Expect a decline after sunset,
but have low PoPs lingering through mid evening.
.SHORT TERM...(Saturday through Sunday)
Issued at 258 PM CDT Fri Jul 30 2021
The broad upper ridge will continue to shift back west (thankfully)
over the weekend as the deepening upper trough digs south through the
Appalachians. This will continue northwest flow aloft, typically
accompanied by more active weather for this time of the year. Will
keep slight chances for showers and storms in the forecast Saturday
afternoon as well, mainly diurnally driven. Have issued a Heat
Advisory for the entire forecast area tomorrow, as afternoon heat
indices climb to the 105-107 degree range. This should be the last
day this product is needed for a while, as an increase in cloud cover
as well as showers and storms comes on Sunday ahead of a frontal
boundary. Some disagreement among models as far as how widespread
this activity will be, but most agree that at least a weak convergent
zone will be present over the area. Will monitor the potential for a
few stronger storms on Sunday, as upper level flow is a bit stronger
and longevity of thunderstorms increases. Primary hazards with this
activity would be gusty winds and heavy rainfall.
Temperatures will top out in the low 90s on Saturday and upper 80s on
Sunday, with overnight lows in the low to mid 70s.
.LONG TERM...(Sunday night through Thursday)
Issued at 258 PM CDT Fri Jul 30 2021
The initial upper-trough will pivot quickly into the northeastern
United States forcing the cold front further to the south across
portions of Central Alabama. Will still carry scattered to low-end
likely PoPs in the forecast during the afternoon (with the highest
values favoring areas south of the area). A cooler, drier air mass
will then settle into the area for early to mid next week with highs
peaking in the mid to upper 80s and lows in the low to mid 60s. With
a strong area of high pressure building in from the north, expect
plenty of sunshine and a mostly dry forecast. In this pattern, we
expect below normal temperatures favored -- certainly not a bad way
to kick off the month of August.
&&
.AVIATION...(For the 00Z TAFS through 00Z Saturday evening)
Issued at 512 PM CDT Fri Jul 30 2021
Clusters of thunderstorms in southern TN will cross through the KHSV
and KMSL areas through 01Z. This will bring a bout of IFR conditions
due to reduced visibility in +RA. The storms may contain gusty winds
and frequent lightning as well. Later tonight, MVFR conditions may
develop due to BR, and areas of FG may also form. Will update the
TAFs later this evening and at 06Z if trends at KHSV and KMSL become
better defined.
&&
.HUN WATCHES/WARNINGS/ADVISORIES...
AL...Heat Advisory until 7 PM CDT this evening for ALZ005>010-016.
Heat Advisory from 10 AM to 7 PM CDT Saturday for ALZ001>010-016.
Excessive Heat Warning until 7 PM CDT this evening for ALZ001>004.
TN...Heat Advisory until 7 PM CDT this evening for TNZ076-096-097.
Heat Advisory from 10 AM to 7 PM CDT Saturday for TNZ076-096-097.
&&
NEAR TERM...17
SHORT TERM...25
LONG TERM...AMP.24
AVIATION...17
For more information please visit our website
at weather.gov/huntsville.Hazardous weather outlook, Jul 30, 2:16 PM CDT, 3 hours 42 minutes before
Hazardous Weather Outlook National Weather Service Huntsville AL 216 PM CDT Fri Jul 30 2021 ALZ001>010-016-TNZ076-096-097-311030- Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN- 216 PM CDT Fri Jul 30 2021 This Hazardous Weather Outlook is for north Alabama and portions of southern middle Tennessee. .DAY ONE...Tonight... Dangerous heat is expected across the Tennessee Valley through early this evening with peak heat index values between 105 to 113 expected. An Excessive Heat Warning is in effect for northwest Alabama and a Heat Advisory is in effect for the rest of north Alabama and southern middle Tennessee until 7 PM CDT. Isolated to scattered thunderstorms are expected to develop today with best chances for activity in southern Middle Tennessee and northeastern Alabama. A few storms may be capable of producing strong wind gusts. .DAYS TWO THROUGH SEVEN...Saturday through Thursday... Dangerous heat is expected across the Tennessee Valley again on Saturday, with peak heat index values in excess of 105 degrees expected. A Heat Advisory is in effect for the entire forecast area from 10 AM to 7 PM CDT. A few strong to marginally severe thunderstorms capable of damaging wind gusts and locally heavy rainfall are possible late Saturday night into Sunday. The coverage of thunderstorms will remain fairly high on Sunday night and Monday, before diminishing on Monday night as a cold front crosses the region. Nonetheless, a few thunderstorms will be possible in the eastern portion of the outlook area through Thursday. .SPOTTER CALL TO ACTION STATEMENT... Activation of storm spotters and emergency management personnel is not anticipated at this time.
In the hours before
Special weather statement, Jul 30, 4:56 PM CDT, 1 hour 2 minutes before
Special Weather Statement
National Weather Service Huntsville AL
456 PM CDT Fri Jul 30 2021
ALZ009-TNZ097-302230-
Jackson AL-Franklin TN-
456 PM CDT Fri Jul 30 2021
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN JACKSON AND
SOUTHWESTERN FRANKLIN COUNTIES UNTIL 530 PM CDT...
At 455 PM CDT, Doppler radar was tracking a strong thunderstorm over
Huntland, moving southeast at 25 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Huntland, Hytop, Lexie Crossroads, Francisco, Beans Creek, Jericho,
Estillfork, Maxwell, Belvidere and Larkin.
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 3497 8596 3486 8623 3492 8624 3493 8625
3495 8626 3510 8632 3513 8632 3517 8622
TIME...MOT...LOC 2155Z 325DEG 20KT 3509 8623
KTWSpecial weather statement, Jul 30, 5:20 PM CDT, 38 minutes before
Special Weather Statement National Weather Service Huntsville AL 520 PM CDT Fri Jul 30 2021 ALZ009-010-302245- DeKalb AL-Jackson AL- 520 PM CDT Fri Jul 30 2021 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN JACKSON AND CENTRAL DEKALB COUNTIES UNTIL 545 PM CDT... At 519 PM CDT, Doppler radar was tracking a strong thunderstorm near Section, moving southeast at 25 mph. Winds in excess of 40 mph will be possible with this storm. Locations impacted include... Fort Payne, Rainsville, Sylvania, Fyffe, Powell, Dutton, Pine Ridge and Guest. 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 3463 8598 3466 8591 3451 8569 3441 8588 TIME...MOT...LOC 2219Z 324DEG 20KT 3462 8592 KTW
Special weather statement, Jul 30, 5:26 PM CDT, 32 minutes before
Special Weather Statement National Weather Service Huntsville AL 526 PM CDT Fri Jul 30 2021 ALZ001-302315- Lauderdale AL- 526 PM CDT Fri Jul 30 2021 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN LAUDERDALE COUNTY UNTIL 615 PM CDT... At 525 PM CDT, Doppler radar was tracking a cluster of strong thunderstorms extending from Walnut Grove to near Collinwood, moving southeast at 15 mph. Wind gusts up to 50 mph will be possible with these storms. Locations impacted include... Florence, Lexington, St. Florian, Underwood-Petersville, Green Hill, Zip City, Threet and Oakland. PRECAUTIONARY/PREPAREDNESS ACTIONS... Very heavy rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. 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 3500 8741 3494 8735 3476 8786 3501 8803 TIME...MOT...LOC 2225Z 327DEG 11KT 3512 8776 KTW
Special weather statement, Jul 30, 5:36 PM CDT, 22 minutes before
Special Weather Statement National Weather Service Huntsville AL 536 PM CDT Fri Jul 30 2021 ALZ009-302245- Jackson AL- 536 PM CDT Fri Jul 30 2021 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL JACKSON COUNTY UNTIL 545 PM CDT... At 536 PM CDT, Doppler radar was tracking a strong thunderstorm 9 miles northeast of Skyline, or 15 miles west of Bridgeport, moving southeast at 20 mph. Winds in excess of 40 mph will be possible with this storm. This storm will remain over mainly rural areas of north central Jackson County. PRECAUTIONARY/PREPAREDNESS ACTIONS... Very heavy rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. 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 3492 8607 3496 8604 3491 8584 3479 8596 TIME...MOT...LOC 2236Z 307DEG 18KT 3490 8600 KTW
Special weather statement, Jul 30, 5:45 PM CDT, 13 minutes before
Special Weather Statement National Weather Service Huntsville AL 545 PM CDT Fri Jul 30 2021 ALZ001-004>006-009-302315- Lawrence AL-Madison AL-Lauderdale AL-Limestone AL-Jackson AL- 545 PM CDT Fri Jul 30 2021 ...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL JACKSON...NORTHERN MADISON...EASTERN LAUDERDALE...LIMESTONE AND NORTHEASTERN LAWRENCE COUNTIES UNTIL 615 PM CDT... At 545 PM CDT, Doppler radar was tracking strong thunderstorms along a line extending from near New Market to near Lexington. Movement was southeast at 20 mph. Winds in excess of 40 mph will be possible with these storms. Locations impacted include... Huntsville, Madison, Athens, Moores Mill, Meridianville, Hazel Green, Rogersville, Ardmore, Gurley and Lexington. 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 line of storms has passed. Frequent cloud to ground lightning is occurring with these storms. Lightning can strike several miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 3499 8645 3472 8633 3470 8730 3500 8742 TIME...MOT...LOC 2245Z 329DEG 17KT 3497 8643 3495 8730
Special weather statement, Jul 30, 5:46 PM CDT, 12 minutes before
Special Weather Statement
National Weather Service Huntsville AL
546 PM CDT Fri Jul 30 2021
ALZ006-008>010-302330-
Marshall AL-Madison AL-DeKalb AL-Jackson AL-
546 PM CDT Fri Jul 30 2021
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL JACKSON...NORTHEASTERN
MARSHALL...NORTHEASTERN MADISON AND CENTRAL DEKALB COUNTIES UNTIL 630
PM CDT...
At 546 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 8 miles east of New Market to near Skyline to
near Hollywood. Movement was southeast at 30 mph.
Wind gusts up to 50 mph will be possible with these storms.
Locations impacted include...
Scottsboro, Fort Payne, Rainsville, Henagar, Sylvania, Hollywood,
Powell, Skyline, Section and Pisgah.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike several miles away from a thunderstorm. Seek a
safe shelter inside a building or vehicle.
&&
LAT...LON 3458 8623 3452 8589 3448 8561 3489 8589
3490 8616 3498 8635
TIME...MOT...LOC 2246Z 330DEG 25KT 3492 8628 3485 8613 3481 8596
KTWThe office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 1:42 PM CDT | Excessive Heat Warning | HUN | Colbert, Franklin, Lauderdale, Lawrence | 5 hr |
| Jul 30, 2:24 PM CDT | Heat Advisory | HUN | Colbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more | 29 hr |
| Jul 30, 3:25 PM CDT | Special Weather Statement | HUN | Lawrence | 50 min |
| Jul 30, 3:59 PM CDT | Special Weather Statement | HUN | Jackson | 31 min |
| Jul 30, 4:08 PM CDT | Severe Thunderstorm Warning | HUN | DeKalb, Jackson, Marshall | 37 min |
| Jul 30, 4:09 PM CDT | Special Weather Statement | HUN | Morgan | 51 min |
| Jul 30, 4:13 PM CDT | Special Weather Statement | HUN | Marshall | 47 min |
| Jul 30, 4:48 PM CDT | Special Weather Statement | HUN | DeKalb | 27 min |
| Jul 30, 5:20 PM CDT | Special Weather Statement | HUN | DeKalb | 25 min |
| Jul 30, 5:26 PM CDT | Special Weather Statement | HUN | Lauderdale | 49 min |
| Jul 30, 5:36 PM CDT | Special Weather Statement | HUN | Jackson | 9 min |
| Jul 30, 5:45 PM CDT | Special Weather Statement | HUN | Limestone, Madison | 30 min |
| Jul 30, 5:46 PM CDT | Special Weather Statement | HUN | Jackson | 44 min |
| Jul 30, 6:10 PM CDT | Special Weather Statement | HUN | Lawrence, Limestone, Madison, Morgan | 50 min |
| Jul 30, 6:28 PM CDT | Severe Thunderstorm Warning | HUN | Jackson, Madison | 32 min |
| Jul 30, 6:37 PM CDT | Severe Thunderstorm Warning | HUN | Cullman | 23 min |
| Jul 30, 6:55 PM CDT | Special Weather Statement | HUN | Cullman, DeKalb, Lawrence, Marshall, Morgan | 50 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 2021Every severe thunderstorm 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.