Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL5
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 195
NWS Storm Prediction Center Norman OK
220 PM MDT Wed May 20 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northeast Colorado
Nebraska Panhandle
Western South Dakota
Eastern Wyoming
* Effective this Wednesday afternoon and evening from 220 PM
until 1000 PM MDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2.5
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY...Storms will continue to develop and intensify this
afternoon initially across eastern Wyoming. Initial supercells are
expected with large hail a distinct possibility. Over time, storms
will develop/spread toward western portions of South Dakota and
Nebraska, and also develop southward into northern Colorado by
evening. The damaging wind threat will also increase by early
evening and a tornado cannot be ruled out, particularly along the
Wyoming/South Dakota/Nebraska border vicinity.
The severe thunderstorm watch area is approximately along and 65
statute miles east and west of a line from 70 miles northeast of
Gillette WY to 65 miles southwest of Sidney NE. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU5).
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.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
19020.
...Guyer
SEL5
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 195
NWS Storm Prediction Center Norman OK
220 PM MDT Wed May 20 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northeast Colorado
Nebraska Panhandle
Western South Dakota
Eastern Wyoming
* Effective this Wednesday afternoon and evening from 220 PM
until 1000 PM MDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2.5
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY...Storms will continue to develop and intensify this
afternoon initially across eastern Wyoming. Initial supercells are
expected with large hail a distinct possibility. Over time, storms
will develop/spread toward western portions of South Dakota and
Nebraska, and also develop southward into northern Colorado by
evening. The damaging wind threat will also increase by early
evening and a tornado cannot be ruled out, particularly along the
Wyoming/South Dakota/Nebraska border vicinity.
The severe thunderstorm watch area is approximately along and 65
statute miles east and west of a line from 70 miles northeast of
Gillette WY to 65 miles southwest of Sidney NE. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU5).
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.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
19020.
...Guyer
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW5
WW 195 SEVERE TSTM CO NE SD WY 202020Z - 210400Z
AXIS..65 STATUTE MILES EAST AND WEST OF LINE..
70NE GCC/GILLETTE WY/ - 65SW SNY/SIDNEY NE/
..AVIATION COORDS.. 55NM E/W /92NW RAP - 35WNW AKO/
HAIL SURFACE AND ALOFT..2.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 19020.
LAT...LON 45050318 40410262 40410509 45050585
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU5.
Watch 195 Status Report Messages:
STATUS REPORT #4 ON WW 195
VALID 210345Z - 210440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 E FCL TO
35 SSW BFF TO 5 S AIA.
..SPC..05/21/20
ATTN...WFO...BOU...CYS...UNR...
&&
STATUS REPORT FOR WS 195
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
COC075-087-123-210440-
CO
. COLORADO COUNTIES INCLUDED ARE
LOGAN MORGAN WELD
$$
NEC007-033-105-123-210440-
NE
. NEBRASKA COUNTIES INCLUDED ARE
BANNER CHEYENNE KIMBALL
MORRILL
$$
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.
$$
STATUS REPORT #3 ON WW 195
VALID 210235Z - 210340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 E FCL TO
30 ENE CYS TO 15 W BFF TO 20 SSE CDR.
..SPC..05/21/20
ATTN...WFO...BOU...CYS...UNR...
&&
STATUS REPORT FOR WS 195
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
COC075-087-123-210340-
CO
. COLORADO COUNTIES INCLUDED ARE
LOGAN MORGAN WELD
$$
NEC007-013-033-105-123-157-210340-
NE
. NEBRASKA COUNTIES INCLUDED ARE
BANNER BOX BUTTE CHEYENNE
KIMBALL MORRILL SCOTTS BLUFF
$$
WYC021-210340-
WY
. WYOMING COUNTIES INCLUDED ARE
LARAMIE
$$
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.
$$
STATUS REPORT #2 ON WW 195
VALID 210050Z - 210140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 5 SW FCL TO
15 NE CYS TO 10 N TOR TO 30 NNW CDR TO 25 WSW RAP TO 45 WNW RAP
TO 60 ENE GCC TO 40 SE 4BQ.
..SPC..05/21/20
ATTN...WFO...BOU...CYS...UNR...
&&
STATUS REPORT FOR WS 195
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
COC075-087-123-210140-
CO
. COLORADO COUNTIES INCLUDED ARE
LOGAN MORGAN WELD
$$
NEC007-013-033-045-105-123-157-165-210140-
NE
. NEBRASKA COUNTIES INCLUDED ARE
BANNER BOX BUTTE CHEYENNE
DAWES KIMBALL MORRILL
SCOTTS BLUFF SIOUX
$$
SDC019-033-047-081-093-103-210140-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BUTTE CUSTER FALL RIVER
LAWRENCE MEADE PENNINGTON
$$
WYC011-015-021-210140-
WY
. WYOMING COUNTIES INCLUDED ARE
CROOK GOSHEN LARAMIE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 195
VALID 202315Z - 210040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 5 WSW FCL TO
5 NNW CYS TO 35 NW TOR TO 55 NE DGW TO 20 ESE GCC TO 25 SSW 4BQ.
..SPC..05/20/20
ATTN...WFO...BOU...CYS...UNR...
&&
STATUS REPORT FOR WS 195
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
COC075-087-123-210040-
CO
. COLORADO COUNTIES INCLUDED ARE
LOGAN MORGAN WELD
$$
NEC007-013-033-045-105-123-157-165-210040-
NE
. NEBRASKA COUNTIES INCLUDED ARE
BANNER BOX BUTTE CHEYENNE
DAWES KIMBALL MORRILL
SCOTTS BLUFF SIOUX
$$
SDC019-033-047-081-093-103-210040-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BUTTE CUSTER FALL RIVER
LAWRENCE MEADE PENNINGTON
$$
WYC011-015-021-027-045-210040-
WY
. WYOMING COUNTIES INCLUDED ARE
CROOK GOSHEN LARAMIE
NIOBRARA WESTON
$$
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
|
Mod (40%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (50%)
|
Probability of 1 or more hailstones > 2 inches
|
Mod (50%)
|
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.
weather.gov 
@NWSSPC
