Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL8
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 148
NWS Storm Prediction Center Norman OK
1000 PM CDT Fri Jun 1 2018
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Extreme western Iowa
Parts of central and eastern Nebraska
Extreme southeastern South Dakota
* Effective this Friday night and Saturday morning from 1000 PM
until 400 AM CDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 75
mph likely
Scattered large hail likely with isolated very large hail events
to 2 inches in diameter possible
A tornado or two possible
SUMMARY...Thunderstorms have coalesced into a larger convective
system from central into northeastern Nebraska, and these storms
will spread eastward and develop southward well into the overnight
hours. The storm environment will favor a continuing threat for
large hail with the stronger embedded storms/supercells, while the
threat for damaging winds will increase as the storms become more
linear. There will also be some threat for a tornado or two with
embedded circulations.
The severe thunderstorm watch area is approximately along and 75
statute miles east and west of a line from 30 miles north northwest
of Sioux City IA to 40 miles south of Hastings NE. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU8).
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...This severe thunderstorm watch replaces
tornado watch number 147. Watch number 147 will not be in effect
after 1000 PM CDT.
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 600. Mean storm motion vector
29030.
...Thompson
SEL8
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 148
NWS Storm Prediction Center Norman OK
1000 PM CDT Fri Jun 1 2018
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Extreme western Iowa
Parts of central and eastern Nebraska
Extreme southeastern South Dakota
* Effective this Friday night and Saturday morning from 1000 PM
until 400 AM CDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 75
mph likely
Scattered large hail likely with isolated very large hail events
to 2 inches in diameter possible
A tornado or two possible
SUMMARY...Thunderstorms have coalesced into a larger convective
system from central into northeastern Nebraska, and these storms
will spread eastward and develop southward well into the overnight
hours. The storm environment will favor a continuing threat for
large hail with the stronger embedded storms/supercells, while the
threat for damaging winds will increase as the storms become more
linear. There will also be some threat for a tornado or two with
embedded circulations.
The severe thunderstorm watch area is approximately along and 75
statute miles east and west of a line from 30 miles north northwest
of Sioux City IA to 40 miles south of Hastings NE. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU8).
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...This severe thunderstorm watch replaces
tornado watch number 147. Watch number 147 will not be in effect
after 1000 PM CDT.
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 600. Mean storm motion vector
29030.
...Thompson
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW8
WW 148 SEVERE TSTM IA NE SD 020300Z - 020900Z
AXIS..75 STATUTE MILES EAST AND WEST OF LINE..
30NNW SUX/SIOUX CITY IA/ - 40S HSI/HASTINGS NE/
..AVIATION COORDS.. 65NM E/W /52S FSD - 76NNW SLN/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..65 KNOTS.
MAX TOPS TO 600. MEAN STORM MOTION VECTOR 29030.
REPLACES WW 147..NE
LAT...LON 42799512 40009701 40009984 42799808
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU8.
Watch 148 Status Report Messages:
STATUS REPORT #1 ON WW 148
VALID 020535Z - 020640Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 ESE MCK
TO 35 SW EAR TO 10 W GRI TO 30 S OLU TO 25 ENE LNK TO 15 S TQE TO
20 N TQE TO 45 NNE SUX.
..GLEASON..06/02/18
ATTN...WFO...FSD...OAX...GID...
&&
STATUS REPORT FOR WS 148
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC021-035-085-093-129-133-137-149-155-165-193-020640-
IA
. IOWA COUNTIES INCLUDED ARE
BUENA VISTA CHEROKEE HARRISON
IDA MILLS MONONA
MONTGOMERY PLYMOUTH POTTAWATTAMIE
SHELBY WOODBURY
$$
NEC001-021-025-035-055-059-061-065-067-079-081-083-095-097-099-
109-129-131-137-151-153-159-169-177-181-185-020640-
NE
. NEBRASKA COUNTIES INCLUDED ARE
ADAMS BURT CASS
CLAY DOUGLAS FILLMORE
FRANKLIN FURNAS GAGE
HALL HAMILTON HARLAN
JEFFERSON JOHNSON KEARNEY
LANCASTER NUCKOLLS OTOE
PHELPS SALINE SARPY
SEWARD THAYER WASHINGTON
WEBSTER YORK
$$
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 (F2-F5) tornadoes
|
Low (5%)
|
Wind
Probability of 10 or more severe wind events
|
High (70%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (60%)
|
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% (F2-F5 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.