Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 311
NWS Storm Prediction Center Norman OK
635 PM CDT Thu Jun 24 2021
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Southern Iowa
Northern Missouri
* Effective this Thursday evening from 635 PM until 1000 PM CDT.
* Primary threats include...
A couple tornadoes possible
Scattered damaging winds likely with isolated significant gusts
to 80 mph possible
Isolated very large hail events to 2 inches in diameter possible
SUMMARY...A couple supercells may be sustained across southern Iowa
and northern Missouri this evening, before growing upscale into a
broader cluster towards late evening.
The tornado watch area is approximately along and 55 statute miles
north and south of a line from 55 miles west southwest of Lamoni IA
to 20 miles north northeast of Kirksville MO. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU1).
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 309...WW 310...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 70 knots. A few cumulonimbi with maximum tops to 550. Mean
storm motion vector 27030.
...Grams
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 311
NWS Storm Prediction Center Norman OK
635 PM CDT Thu Jun 24 2021
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Southern Iowa
Northern Missouri
* Effective this Thursday evening from 635 PM until 1000 PM CDT.
* Primary threats include...
A couple tornadoes possible
Scattered damaging winds likely with isolated significant gusts
to 80 mph possible
Isolated very large hail events to 2 inches in diameter possible
SUMMARY...A couple supercells may be sustained across southern Iowa
and northern Missouri this evening, before growing upscale into a
broader cluster towards late evening.
The tornado watch area is approximately along and 55 statute miles
north and south of a line from 55 miles west southwest of Lamoni IA
to 20 miles north northeast of Kirksville MO. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU1).
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 309...WW 310...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 70 knots. A few cumulonimbi with maximum tops to 550. Mean
storm motion vector 27030.
...Grams
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW1
WW 311 TORNADO IA MO 242335Z - 250300Z
AXIS..55 STATUTE MILES NORTH AND SOUTH OF LINE..
55WSW LWD/LAMONI IA/ - 20NNE IRK/KIRKSVILLE MO/
..AVIATION COORDS.. 50NM N/S /61E PWE - 16NNE IRK/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..70 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 27030.
LAT...LON 41109489 41169240 39579240 39509489
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU1.
Watch 311 Status Report Messages:
STATUS REPORT #2 ON WW 311
VALID 250150Z - 250240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 ENE SDA
TO 25 NNW LWD TO 30 NNE LWD TO 5 SW OXV.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1084
..LYONS..06/25/21
ATTN...WFO...DMX...EAX...
&&
STATUS REPORT FOR WT 311
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC007-051-053-117-135-159-173-179-185-250240-
IA
. IOWA COUNTIES INCLUDED ARE
APPANOOSE DAVIS DECATUR
LUCAS MONROE RINGGOLD
TAYLOR WAPELLO WAYNE
$$
MOC001-025-049-061-063-075-079-081-115-117-121-129-171-197-211-
227-250240-
MO
. MISSOURI COUNTIES INCLUDED ARE
ADAIR CALDWELL CLINTON
DAVIESS DEKALB GENTRY
GRUNDY HARRISON LINN
LIVINGSTON MACON MERCER
PUTNAM SCHUYLER SULLIVAN
WORTH
$$
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.
$$
STATUS REPORT #1 ON WW 311
VALID 250040Z - 250140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1084
..LYONS..06/25/21
ATTN...WFO...DMX...EAX...
&&
STATUS REPORT FOR WT 311
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC003-007-039-051-053-117-135-159-173-175-179-185-250140-
IA
. IOWA COUNTIES INCLUDED ARE
ADAMS APPANOOSE CLARKE
DAVIS DECATUR LUCAS
MONROE RINGGOLD TAYLOR
UNION WAPELLO WAYNE
$$
MOC001-025-049-061-063-075-079-081-115-117-121-129-171-197-211-
227-250140-
MO
. MISSOURI COUNTIES INCLUDED ARE
ADAIR CALDWELL CLINTON
DAVIESS DEKALB GENTRY
GRUNDY HARRISON LINN
LIVINGSTON MACON MERCER
PUTNAM SCHUYLER SULLIVAN
WORTH
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Mod (30%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (20%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (60%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (50%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (30%)
|
Probability of 1 or more hailstones > 2 inches
|
Mod (30%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (80%)
|
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.