Tornado Watch 474

Issued

Aug 29, 2021, 6:49 PM CDT (23:49 UTC)

Expired

Aug 30, 2021, 6:00 AM CDT

In force

11 hr

Issued by

the Storm Prediction Center

Strongest gust expected

60 kt

Two or more tornadoes

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

10%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

5%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

20%

• Mesoscale Discussion 1644 Severe potential...tornado watch likelyAug 29, 5:37 PM CDT
• Mesoscale Discussion 1645 Tornado watch 474Aug 30, 2:44 AM CDT

041 
WWUS20 KWNS 292344
SEL4  
SPC WW 292344
ALZ000-FLZ000-LAZ000-MSZ000-CWZ000-301100-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 474
NWS Storm Prediction Center Norman OK
645 PM CDT Sun Aug 29 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Southwestern Alabama
  Western Florida Panhandle
  Southeastern Louisiana
  Southern Mississippi
  Coastal Waters

* Effective this Sunday night and Monday morning from 645 PM
  until 600 AM CDT.

* Primary threats include...
  A few tornadoes possible

SUMMARY...Hurricane Ida will continue to translate northward (see
latest NHC advisory for tropical watches/warnings and
track/intensity guidance).  As it does, a favorable air mass for
supercell/tornado potential will spread gradually inland overnight.

The tornado watch area is approximately along and 60 statute miles
north and south of a line from 40 miles northwest of Slidell LA to
20 miles northeast of Pensacola FL. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU4).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.

&&

OTHER WATCH INFORMATION...This tornado watch replaces tornado
watch number 472. Watch number 472 will not be in effect after
645 PM CDT. 

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 0 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 13045.

...Edwards

Tornado Watches in Mississippi, 2021Tornado Watches in Alabama, 2021Tornado Watches in Louisiana, 2021Every tornado watch in 2021

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.