Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 584
NWS Storm Prediction Center Norman OK
615 PM CDT Wed Jul 31 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western and Central Iowa
Northern Missouri
* Effective this Wednesday night and Thursday morning from 615 PM
until 100 AM CDT.
* Primary threats include...
Widespread damaging winds and isolated significant gusts to 90
mph likely
Isolated large hail events to 1.5 inches in diameter possible
A tornado or two possible
SUMMARY...An intense severe-wind producing bow echo will continue
eastward this evening into western and central Iowa and perhaps
adjacent parts of northern Missouri. Numerous to widespread severe
gusts (60-90 mph), and perhaps a tornado, are the primary hazards
with this squall line as it moves east into the Watch area.
The severe thunderstorm watch area is approximately along and 85
statute miles east and west of a line from 45 miles north northwest
of Des Moines IA to 35 miles south southwest of Lamoni IA. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU4).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for 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. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 579...WW 580...WW
581...WW 582...WW 583...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 80 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
26045.
...Smith
SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 584
NWS Storm Prediction Center Norman OK
615 PM CDT Wed Jul 31 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western and Central Iowa
Northern Missouri
* Effective this Wednesday night and Thursday morning from 615 PM
until 100 AM CDT.
* Primary threats include...
Widespread damaging winds and isolated significant gusts to 90
mph likely
Isolated large hail events to 1.5 inches in diameter possible
A tornado or two possible
SUMMARY...An intense severe-wind producing bow echo will continue
eastward this evening into western and central Iowa and perhaps
adjacent parts of northern Missouri. Numerous to widespread severe
gusts (60-90 mph), and perhaps a tornado, are the primary hazards
with this squall line as it moves east into the Watch area.
The severe thunderstorm watch area is approximately along and 85
statute miles east and west of a line from 45 miles north northwest
of Des Moines IA to 35 miles south southwest of Lamoni IA. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU4).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for 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. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 579...WW 580...WW
581...WW 582...WW 583...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 80 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
26045.
...Smith
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW4
WW 584 SEVERE TSTM IA MO 312315Z - 010600Z
AXIS..85 STATUTE MILES EAST AND WEST OF LINE..
45NNW DSM/DES MOINES IA/ - 35SSW LWD/LAMONI IA/
..AVIATION COORDS.. 75NM E/W /31SSE FOD - 57NNE MCI/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..80 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 26045.
LAT...LON 42129235 40139257 40139579 42129566
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.
Watch 584 Status Report Messages:
STATUS REPORT #3 ON WW 584
VALID 010440Z - 010540Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..BROYLES..08/01/24
ATTN...WFO...DMX...OAX...EAX...
&&
STATUS REPORT FOR WS 584
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC051-010540-
IA
. IOWA COUNTIES INCLUDED ARE
DAVIS
$$
MOC129-171-010540-
MO
. MISSOURI COUNTIES INCLUDED ARE
MERCER PUTNAM
$$
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.
$$
STATUS REPORT #2 ON WW 584
VALID 010230Z - 010340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NNW STJ
TO 35 ENE LWD TO 20 ENE DSM TO 20 ESE FOD.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1778
..WEINMAN..08/01/24
ATTN...WFO...DMX...OAX...EAX...
&&
STATUS REPORT FOR WS 584
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC007-051-053-099-117-123-125-127-135-157-169-171-179-185-
010340-
IA
. IOWA COUNTIES INCLUDED ARE
APPANOOSE DAVIS DECATUR
JASPER LUCAS MAHASKA
MARION MARSHALL MONROE
POWESHIEK STORY TAMA
WAPELLO WAYNE
$$
MOC075-081-129-171-227-010340-
MO
. MISSOURI COUNTIES INCLUDED ARE
GENTRY HARRISON MERCER
PUTNAM 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 584
VALID 010055Z - 010140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 WNW STJ
TO 50 WSW DSM TO 30 ESE SUX.
..WEINMAN..08/01/24
ATTN...WFO...DMX...OAX...EAX...
&&
STATUS REPORT FOR WS 584
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC001-003-007-009-015-027-039-047-049-051-053-073-077-099-117-
121-123-125-127-135-153-157-159-169-171-173-175-179-181-185-
010140-
IA
. IOWA COUNTIES INCLUDED ARE
ADAIR ADAMS APPANOOSE
AUDUBON BOONE CARROLL
CLARKE CRAWFORD DALLAS
DAVIS DECATUR GREENE
GUTHRIE JASPER LUCAS
MADISON MAHASKA MARION
MARSHALL MONROE POLK
POWESHIEK RINGGOLD STORY
TAMA TAYLOR UNION
WAPELLO WARREN WAYNE
$$
MOC075-081-129-147-171-227-010140-
MO
. MISSOURI COUNTIES INCLUDED ARE
GENTRY HARRISON MERCER
NODAWAY PUTNAM WORTH
$$
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
|
Low (20%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (5%)
|
Wind
Probability of 10 or more severe wind events
|
High (90%)
|
Probability of 1 or more wind events > 65 knots
|
High (70%)
|
Hail
Probability of 10 or more severe hail events
|
Low (20%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (20%)
|
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.
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