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 256
NWS Storm Prediction Center Norman OK
100 AM CDT Fri Jun 5 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Central and Eastern Iowa
* Effective this Friday morning from 100 AM until 700 AM CDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Isolated damaging wind gusts to 70 mph possible
SUMMARY...Scattered strong to severe thunderstorms will move
east-southeastward across the region overnight. Isolated severe hail
should be the most common hazard, but locally damaging winds could
also occur, particularly if storms semi-organize into a linear
cluster, which is most probable to occur across
north-central/east-central Iowa.
The severe thunderstorm watch area is approximately along and 75
statute miles north and south of a line from 25 miles west southwest
of Fort Dodge IA to 35 miles north northeast of Cedar Rapids 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 254...WW 255...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
29025.
...Guyer
SEL6
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 256
NWS Storm Prediction Center Norman OK
100 AM CDT Fri Jun 5 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Central and Eastern Iowa
* Effective this Friday morning from 100 AM until 700 AM CDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Isolated damaging wind gusts to 70 mph possible
SUMMARY...Scattered strong to severe thunderstorms will move
east-southeastward across the region overnight. Isolated severe hail
should be the most common hazard, but locally damaging winds could
also occur, particularly if storms semi-organize into a linear
cluster, which is most probable to occur across
north-central/east-central Iowa.
The severe thunderstorm watch area is approximately along and 75
statute miles north and south of a line from 25 miles west southwest
of Fort Dodge IA to 35 miles north northeast of Cedar Rapids 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 254...WW 255...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
29025.
...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 256 SEVERE TSTM IA 050600Z - 051200Z
AXIS..75 STATUTE MILES NORTH AND SOUTH OF LINE..
25WSW FOD/FORT DODGE IA/ - 35NNE CID/CEDAR RAPIDS IA/
..AVIATION COORDS.. 65NM N/S /20SW FOD - 33W DBQ/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 29025.
LAT...LON 43509465 43439146 41269146 41339465
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU6.
Watch 256 Status Report Messages:
STATUS REPORT #5 ON WW 256
VALID 051115Z - 051240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 NW IRK TO
40 NNE OXV TO 30 W CID TO 40 NE IRK.
..LEITMAN..06/05/20
ATTN...WFO...ARX...DVN...DMX...
&&
STATUS REPORT FOR WS 256
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC007-051-123-135-157-179-051240-
IA
. IOWA COUNTIES INCLUDED ARE
APPANOOSE DAVIS MAHASKA
MONROE POWESHIEK WAPELLO
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #4 ON WW 256
VALID 051025Z - 051140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 5 ESE LWD TO
15 W OXV TO 35 N OXV TO 25 NNW CID TO 20 WSW DBQ.
..LEITMAN..06/05/20
ATTN...WFO...ARX...DVN...DMX...
&&
STATUS REPORT FOR WS 256
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC007-011-051-053-095-099-103-113-117-123-125-135-157-171-179-
181-185-051140-
IA
. IOWA COUNTIES INCLUDED ARE
APPANOOSE BENTON DAVIS
DECATUR IOWA JASPER
JOHNSON LINN LUCAS
MAHASKA MARION MONROE
POWESHIEK TAMA 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 256
VALID 050930Z - 051040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 SE DNS TO
35 NNW DSM TO 35 ESE FOD TO 20 WSW ALO TO 15 ENE ALO TO 35 S LSE.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 837.
..LEITMAN..06/05/20
ATTN...WFO...ARX...DVN...DMX...
&&
STATUS REPORT FOR WS 256
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC001-005-007-009-011-013-015-019-029-039-043-049-051-053-055-
065-075-077-079-083-095-099-103-113-117-121-123-125-127-135-153-
157-159-169-171-175-179-181-185-051040-
IA
. IOWA COUNTIES INCLUDED ARE
ADAIR ALLAMAKEE APPANOOSE
AUDUBON BENTON BLACK HAWK
BOONE BUCHANAN CASS
CLARKE CLAYTON DALLAS
DAVIS DECATUR DELAWARE
FAYETTE GRUNDY GUTHRIE
HAMILTON HARDIN IOWA
JASPER JOHNSON LINN
LUCAS MADISON MAHASKA
MARION MARSHALL MONROE
POLK POWESHIEK RINGGOLD
STORY TAMA 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 256
VALID 050840Z - 050940Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 NNW DNS
TO 25 SSW FOD TO 20 E FOD TO 25 WNW ALO TO 40 NNE ALO TO 35 SE
RST.
..LEITMAN..06/05/20
ATTN...WFO...ARX...DVN...DMX...
&&
STATUS REPORT FOR WS 256
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC001-005-009-011-013-015-017-019-023-027-029-037-043-047-049-
055-065-069-073-075-077-079-083-095-099-103-113-121-123-125-127-
153-157-169-171-181-187-191-050940-
IA
. IOWA COUNTIES INCLUDED ARE
ADAIR ALLAMAKEE AUDUBON
BENTON BLACK HAWK BOONE
BREMER BUCHANAN BUTLER
CARROLL CASS CHICKASAW
CLAYTON CRAWFORD DALLAS
DELAWARE FAYETTE FRANKLIN
GREENE GRUNDY GUTHRIE
HAMILTON HARDIN IOWA
JASPER JOHNSON LINN
MADISON MAHASKA MARION
MARSHALL POLK POWESHIEK
STORY TAMA WARREN
WEBSTER WINNESHIEK
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 256
VALID 050730Z - 050840Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 ESE SPW
TO 25 WNW MCW TO 15 ENE MCW TO 25 S RST.
..LEITMAN..06/05/20
ATTN...WFO...ARX...DVN...DMX...
&&
STATUS REPORT FOR WS 256
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC001-005-009-011-013-015-017-019-023-025-027-029-033-037-043-
047-049-055-065-067-069-073-075-077-079-081-083-089-091-095-099-
103-113-121-123-125-127-131-151-153-157-161-169-171-181-187-191-
197-050840-
IA
. IOWA COUNTIES INCLUDED ARE
ADAIR ALLAMAKEE AUDUBON
BENTON BLACK HAWK BOONE
BREMER BUCHANAN BUTLER
CALHOUN CARROLL CASS
CERRO GORDO CHICKASAW CLAYTON
CRAWFORD DALLAS DELAWARE
FAYETTE FLOYD FRANKLIN
GREENE GRUNDY GUTHRIE
HAMILTON HANCOCK HARDIN
HOWARD HUMBOLDT IOWA
JASPER JOHNSON LINN
MADISON MAHASKA MARION
MARSHALL MITCHELL POCAHONTAS
POLK POWESHIEK SAC
STORY TAMA WARREN
WEBSTER WINNESHIEK WRIGHT
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (<5%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (<2%)
|
Wind
Probability of 10 or more severe wind events
|
Low (20%)
|
Probability of 1 or more wind events > 65 knots
|
Low (<5%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (40%)
|
Probability of 1 or more hailstones > 2 inches
|
Mod (30%)
|
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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