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
Severe Thunderstorm Watch Number 216
NWS Storm Prediction Center Norman OK
525 AM CDT Sun May 24 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western and central Iowa
Small part of southeastern Nebraska
* Effective this Sunday morning and afternoon from 525 AM until
100 PM CDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Isolated large hail events to 1 inch in diameter possible
SUMMARY...A well-developed squall line, with a history of sporadic
measured-severe gusts in central/eastern Nebraska, will continue to
pose a threat for damaging winds as it moves into the watch area, on
either side of a warm front.
The severe thunderstorm watch area is approximately along and 85
statute miles east and west of a line from 10 miles west of Lamoni
IA to 50 miles north northwest of Des Moines IA. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU6).
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 215...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few
cumulonimbi with maximum tops to 500. Mean storm motion vector
27040.
...Edwards
SEL6
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 216
NWS Storm Prediction Center Norman OK
525 AM CDT Sun May 24 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western and central Iowa
Small part of southeastern Nebraska
* Effective this Sunday morning and afternoon from 525 AM until
100 PM CDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Isolated large hail events to 1 inch in diameter possible
SUMMARY...A well-developed squall line, with a history of sporadic
measured-severe gusts in central/eastern Nebraska, will continue to
pose a threat for damaging winds as it moves into the watch area, on
either side of a warm front.
The severe thunderstorm watch area is approximately along and 85
statute miles east and west of a line from 10 miles west of Lamoni
IA to 50 miles north northwest of Des Moines IA. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU6).
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 215...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few
cumulonimbi with maximum tops to 500. Mean storm motion vector
27040.
...Edwards
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW6
WW 216 SEVERE TSTM IA NE 241025Z - 241800Z
AXIS..85 STATUTE MILES EAST AND WEST OF LINE..
10W LWD/LAMONI IA/ - 50NNW DSM/DES MOINES IA/
..AVIATION COORDS.. 75NM E/W /54SSW DSM - 27SSE FOD/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27040.
LAT...LON 40599574 42199570 42199238 40599250
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU6.
Watch 216 Status Report Messages:
STATUS REPORT #4 ON WW 216
VALID 241410Z - 241540Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 SE SDA TO
30 E SDA TO 50 NE SDA TO 30 WSW DSM TO 10 NNW OXV TO 35 NE OTM.
..BENTLEY..05/24/20
ATTN...WFO...DMX...OAX...
&&
STATUS REPORT FOR WS 216
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC003-007-039-051-053-117-121-123-125-135-159-173-175-179-181-
185-241540-
IA
. IOWA COUNTIES INCLUDED ARE
ADAMS APPANOOSE CLARKE
DAVIS DECATUR LUCAS
MADISON MAHASKA MARION
MONROE RINGGOLD TAYLOR
UNION WAPELLO WARREN
WAYNE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 216
VALID 241325Z - 241440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 SSE SDA
TO 25 NE SDA TO 45 W DSM TO 40 S FOD TO 20 ESE FOD.
..BENTLEY..05/24/20
ATTN...WFO...DMX...OAX...
&&
STATUS REPORT FOR WS 216
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC001-003-007-015-039-049-051-053-099-117-121-123-125-127-135-
153-157-159-169-171-173-175-179-181-185-241440-
IA
. IOWA COUNTIES INCLUDED ARE
ADAIR ADAMS APPANOOSE
BOONE CLARKE DALLAS
DAVIS DECATUR JASPER
LUCAS MADISON MAHASKA
MARION MARSHALL MONROE
POLK POWESHIEK RINGGOLD
STORY TAMA TAYLOR
UNION WAPELLO WARREN
WAYNE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 216
VALID 241215Z - 241300Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 WSW SDA
TO 35 SW FOD.
..SMITH..05/24/20
ATTN...WFO...DMX...OAX...
&&
STATUS REPORT FOR WS 216
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC001-003-007-009-015-027-029-039-049-051-053-071-073-077-099-
117-121-123-125-127-129-135-137-145-153-155-157-159-169-171-173-
175-179-181-185-241300-
IA
. IOWA COUNTIES INCLUDED ARE
ADAIR ADAMS APPANOOSE
AUDUBON BOONE CARROLL
CASS CLARKE DALLAS
DAVIS DECATUR FREMONT
GREENE GUTHRIE JASPER
LUCAS MADISON MAHASKA
MARION MARSHALL MILLS
MONROE MONTGOMERY PAGE
POLK POTTAWATTAMIE POWESHIEK
RINGGOLD STORY TAMA
TAYLOR UNION WAPELLO
WARREN WAYNE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 216
VALID 241140Z - 241200Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 ESE OMA
TO 20 NE DNS.
..SMITH..05/24/20
ATTN...WFO...DMX...OAX...
&&
STATUS REPORT FOR WS 216
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC001-003-007-009-015-027-029-039-047-049-051-053-071-073-077-
099-117-121-123-125-127-129-135-137-145-153-155-157-159-165-169-
171-173-175-179-181-185-241200-
IA
. IOWA COUNTIES INCLUDED ARE
ADAIR ADAMS APPANOOSE
AUDUBON BOONE CARROLL
CASS CLARKE CRAWFORD
DALLAS DAVIS DECATUR
FREMONT GREENE GUTHRIE
JASPER LUCAS MADISON
MAHASKA MARION MARSHALL
MILLS MONROE MONTGOMERY
PAGE POLK POTTAWATTAMIE
POWESHIEK RINGGOLD SHELBY
STORY TAMA TAYLOR
UNION WAPELLO WARREN
WAYNE
$$
NEC025-131-241200-
NE
. NEBRASKA COUNTIES INCLUDED ARE
CASS OTOE
$$
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 (10%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (5%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (40%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Low (20%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (10%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
Mod (60%)
|
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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