Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL6
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 276
NWS Storm Prediction Center Norman OK
1110 AM CDT Tue May 21 2024
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Western Iowa
Northwest Missouri
Eastern Nebraska
Southeast South Dakota
* Effective this Tuesday morning and afternoon from 1110 AM until
500 PM CDT.
* Primary threats include...
A few tornadoes and a couple intense tornadoes possible
Scattered large hail likely with isolated very large hail events
to 3 inches in diameter possible
Scattered damaging wind gusts to 70 mph likely
SUMMARY...The atmosphere is expected to rapidly become favorable for
severe storm development, including the potential for tornadoes,
through early/mid-afternoon.
The tornado watch area is approximately along and 60 statute miles
east and west of a line from 55 miles west northwest of Spencer IA
to 25 miles west of Falls City NE. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU6).
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...CONTINUE...WW 275...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 22035.
...Guyer
SEL6
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 276
NWS Storm Prediction Center Norman OK
1110 AM CDT Tue May 21 2024
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Western Iowa
Northwest Missouri
Eastern Nebraska
Southeast South Dakota
* Effective this Tuesday morning and afternoon from 1110 AM until
500 PM CDT.
* Primary threats include...
A few tornadoes and a couple intense tornadoes possible
Scattered large hail likely with isolated very large hail events
to 3 inches in diameter possible
Scattered damaging wind gusts to 70 mph likely
SUMMARY...The atmosphere is expected to rapidly become favorable for
severe storm development, including the potential for tornadoes,
through early/mid-afternoon.
The tornado watch area is approximately along and 60 statute miles
east and west of a line from 55 miles west northwest of Spencer IA
to 25 miles west of Falls City NE. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU6).
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...CONTINUE...WW 275...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 22035.
...Guyer
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW6
WW 276 TORNADO IA MO NE SD 211610Z - 212200Z
AXIS..60 STATUTE MILES EAST AND WEST OF LINE..
55WNW SPW/SPENCER IA/ - 25W FNB/FALLS CITY NE/
..AVIATION COORDS.. 50NM E/W /29ESE FSD - 10SE PWE/
HAIL SURFACE AND ALOFT..3 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 22035.
LAT...LON 43469497 40069494 40069721 43469736
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU6.
Watch 276 Status Report Messages:
STATUS REPORT #2 ON WW 276
VALID 211935Z - 212040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM FNB TO 25 SW
SLB TO 10 SSE FSD.
..HART..05/21/24
ATTN...WFO...FSD...OAX...EAX...
&&
STATUS REPORT FOR WT 276
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC021-035-041-059-093-119-137-141-143-145-155-165-167-212040-
IA
. IOWA COUNTIES INCLUDED ARE
BUENA VISTA CHEROKEE CLAY
DICKINSON IDA LYON
MONTGOMERY O'BRIEN OSCEOLA
PAGE POTTAWATTAMIE SHELBY
SIOUX
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 276
VALID 211845Z - 211940Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 W FNB TO
25 NNW TQE TO 5 N YKN.
..HART..05/21/24
ATTN...WFO...FSD...OAX...EAX...
&&
STATUS REPORT FOR WT 276
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC021-035-041-059-071-085-093-119-129-133-137-141-143-145-149-
155-165-167-193-211940-
IA
. IOWA COUNTIES INCLUDED ARE
BUENA VISTA CHEROKEE CLAY
DICKINSON FREMONT HARRISON
IDA LYON MILLS
MONONA MONTGOMERY O'BRIEN
OSCEOLA PAGE PLYMOUTH
POTTAWATTAMIE SHELBY SIOUX
WOODBURY
$$
MOC005-211940-
MO
. MISSOURI COUNTIES INCLUDED ARE
ATCHISON
$$
NEC025-043-055-127-147-153-177-211940-
NE
. NEBRASKA COUNTIES INCLUDED ARE
CASS DAKOTA DOUGLAS
NEMAHA RICHARDSON SARPY
WASHINGTON
$$
SDC027-083-127-211940-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
CLAY LINCOLN UNION
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Mod (50%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Mod (40%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (60%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (60%)
|
Probability of 1 or more hailstones > 2 inches
|
Mod (40%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (>95%)
|
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The "Low" category contains probability values ranging from less than 2%
to 20% (EF2-EF5 tornadoes), less than 5% to 20% (all other probabilities),
"Moderate" from 30% to 60%, and "High" from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.
weather.gov 
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