SPC Day 1 Fire Weather Outlook

6 years ago
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1230 AM CDT Sun Aug 11 2019 Valid 111200Z - 121200Z ...Synopsis... Fire weather conditions will gradually improve compared to prior days. A longwave trough initially over Oregon will continue to weaken and lift northeastward toward the northern Rockies. As this occurs, a mid-level jet streak on the periphery of the trough will migrate toward Idaho/Wyoming through peak heating hours. Meanwhile, the widespread thunderstorms observed over Washington/Oregon/northern California and vicinity will diminish significantly as the region comes under the influence of mid/upper subsidence behind the trough. ...Eastern Idaho and western/central Wyoming... Vertical mixing processes beneath the approaching mid-level jet streak will result in areas of 15-25 mph surface winds during peak heating hours - strongest over the Snake River Valley of Idaho and also into southwestern/central Wyoming. RH values will only fall to critical thresholds on a localized basis and will be lowest in central Wyoming (15-30% elsewhere). The atmospheric conditions are most consistent with elevated fire weather thresholds, and the ongoing delineation remains in place for this outlook given the existence of dry fuels across the region. ..Cook.. 08/11/2019 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook

6 years ago
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1230 AM CDT Sun Aug 11 2019 Valid 111200Z - 121200Z ...Synopsis... Fire weather conditions will gradually improve compared to prior days. A longwave trough initially over Oregon will continue to weaken and lift northeastward toward the northern Rockies. As this occurs, a mid-level jet streak on the periphery of the trough will migrate toward Idaho/Wyoming through peak heating hours. Meanwhile, the widespread thunderstorms observed over Washington/Oregon/northern California and vicinity will diminish significantly as the region comes under the influence of mid/upper subsidence behind the trough. ...Eastern Idaho and western/central Wyoming... Vertical mixing processes beneath the approaching mid-level jet streak will result in areas of 15-25 mph surface winds during peak heating hours - strongest over the Snake River Valley of Idaho and also into southwestern/central Wyoming. RH values will only fall to critical thresholds on a localized basis and will be lowest in central Wyoming (15-30% elsewhere). The atmospheric conditions are most consistent with elevated fire weather thresholds, and the ongoing delineation remains in place for this outlook given the existence of dry fuels across the region. ..Cook.. 08/11/2019 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

Green Springs Fire (Wildfire)

6 years ago
The Green Springs Fire is burning in pinyon and juniper in the Green Springs area of the Paradise Range. It is located east of Gabbs, Nevada and north of Nevada State Route 841.

Eastern North Pacific Tropical Weather Outlook

6 years ago

000
ABPZ20 KNHC 110500
TWOEP

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
1100 PM PDT Sat Aug 10 2019

For the eastern North Pacific...east of 140 degrees west longitude:

A large area of disorganized showers and thunderstorms near the
southwestern coast of Mexico is associated with a trough of low
pressure. This system has not become any better organized since
yesterday, and the chances of tropical cyclone formation are
diminishing. The disturbance is expected to move west-northwestward
just off the southwestern coast of Mexico bringing locally heavy
rainfall along portions of that area during the next couple of days.
* Formation chance through 48 hours...low...30 percent.
* Formation chance through 5 days...low...30 percent.

A broad area of low pressure located a few hundred miles south-
southwest of Manzanillo, Mexico is already merging with the
disturbance to its north. Development of this system is becoming
less likely.
* Formation chance through 48 hours...low...10 percent.
* Formation chance through 5 days...low...10 percent.

A disorganized area of disturbed weather continues to be located a
little less than 1000 miles south-southwest of the Baja California
peninsula. Environmental conditions are expected to become more
conducive for tropical cyclone formation by the middle next week as
the system moves west-northwestward at 10 to 15 mph.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...medium...50 percent.

$$
Forecaster Avila
NHC Webmaster

SPC MD 1696

6 years ago
MD 1696 CONCERNING SEVERE POTENTIAL...WATCH POSSIBLE FOR NORTHWESTERN AND NORTH CENTRAL KANSAS INTO SOUTHERN NEBRASKA
Mesoscale Discussion 1696 NWS Storm Prediction Center Norman OK 1143 PM CDT Sat Aug 10 2019 Areas affected...northwestern and north central Kansas into southern Nebraska Concerning...Severe potential...Watch possible Valid 110443Z - 110615Z Probability of Watch Issuance...40 percent SUMMARY...A cluster of strong storms has accelerated across portions of northwestern Kansas, with attendant damaging wind and large hail risk. WW may be needed. DISCUSSION...A cluster of storms which moved out of eastern Colorado into northwest Kansas, has recently produced a downburst, with measured winds to 75 MPH observed in Thomas County KS. This cluster of storms is expanding along the outflow, both north and south, and is moving quickly east-northeastward at near 40 kt. A very moist/unstable airmass exists ahead of the convection, with surface southeasterly winds veering/increasing to southwesterly at 30 kt at 1km per the latest DDC VWP, and then on around to westerly through mid levels. It appears possible that the moist/unstable low-level inflow may continue to sustain the storms, and with deep-layer shear supportive of organized updrafts, risk for damaging winds and hail -- and even a brief tornado -- appears to exist locally. Depending upon evolution of this convection in the near term, a downstream WW may be required. ..Goss/Hart.. 08/11/2019 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...OAX...TOP...ICT...GID...DDC...GLD... LAT...LON 38670092 39410126 40000109 40569908 40419722 39769720 38999910 38670092 Read more

SPC Severe Thunderstorm Watch 568 Status Reports

6 years ago
WW 0568 Status Updates
STATUS REPORT ON WW 568 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 N DGW TO 20 S GCC TO 30 NNW GCC TO 65 SW MLS TO 20 N BIL TO 30 WSW 3HT. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1695 ..COOK..08/11/19 ATTN...WFO...BYZ...UNR...RIW... STATUS REPORT FOR WS 568 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC011-037-065-075-087-103-107-110340- MT . MONTANA COUNTIES INCLUDED ARE CARTER GOLDEN VALLEY MUSSELSHELL POWDER RIVER ROSEBUD TREASURE WHEATLAND SDC019-033-047-081-093-102-103-110340- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE BUTTE CUSTER FALL RIVER LAWRENCE MEADE OGLALA LAKOTA PENNINGTON WYC005-011-045-110340- WY Read more

SPC Severe Thunderstorm Watch 568

6 years ago
WW 568 SEVERE TSTM MT SD WY 102105Z - 110400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 568 NWS Storm Prediction Center Norman OK 305 PM MDT Sat Aug 10 2019 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southern Montana Western South Dakota Northern Wyoming * Effective this Saturday afternoon and evening from 305 PM until 1000 PM MDT. * Primary threats include... Isolated significant damaging wind gusts to 75 mph possible Isolated very large hail events to 2 inches in diameter possible SUMMARY...Scattered thunderstorms will pose a risk for isolated severe hail and wind into late evening. The severe thunderstorm watch area is approximately along and 75 statute miles north and south of a line from 65 miles south southwest of Harlowton MT to 45 miles east of Rapid City SD. 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...CONTINUE...WW 567... 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 550. Mean storm motion vector 25030. ...Grams Read more

SPC Severe Thunderstorm Watch 567 Status Reports

6 years ago
WW 0567 Status Updates
STATUS REPORT ON WW 567 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 NNW LVM TO 20 WNW BZN TO 30 E BTM TO 15 SE HLN TO 25 E GTF. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1695 ..COOK..08/11/19 ATTN...WFO...BOI...MSO...PIH...TFX... STATUS REPORT FOR WS 567 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC007-027-043-045-059-110340- MT . MONTANA COUNTIES INCLUDED ARE BROADWATER FERGUS JEFFERSON JUDITH BASIN MEAGHER 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. Read more

SPC Severe Thunderstorm Watch 567

6 years ago
WW 567 SEVERE TSTM ID MT 101935Z - 110300Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 567 NWS Storm Prediction Center Norman OK 135 PM MDT Sat Aug 10 2019 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Idaho Western Montana * Effective this Saturday afternoon and evening from 135 PM until 900 PM MDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2 inches in diameter possible Scattered damaging wind gusts to 70 mph possible SUMMARY...Scattered thunderstorms will develop from the Oregon-Idaho border region across southwest Montana. Some of these should become strong to severe, producing large hail and damaging winds. The severe thunderstorm watch area is approximately along and 115 statute miles north and south of a line from 35 miles west northwest of Boise ID to 60 miles southeast of Helena MT. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU7). 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 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 21030. ...Grams Read more

SPC MD 1695

6 years ago
MD 1695 CONCERNING SEVERE THUNDERSTORM WATCH 567...568... FOR SOUTHERN MONTANA...NORTHEAST WYOMING...AND WESTERN SOUTH DAKOTA
Mesoscale Discussion 1695 NWS Storm Prediction Center Norman OK 0934 PM CDT Sat Aug 10 2019 Areas affected...southern Montana...northeast Wyoming...and western South Dakota Concerning...Severe Thunderstorm Watch 567...568... Valid 110234Z - 110400Z The severe weather threat for Severe Thunderstorm Watch 567, 568 continues. SUMMARY...Local severe risk -- mainly in the form of gusty/damaging winds -- continues, but should gradually diminish over the next 1-2 hours. DISCUSSION...Latest IR satellite and radar loops show convection gradually decreasing in intensity across WW 567 and 568, with the most persistent/intense storms occurring across portions of southwestern Montana, as well as over northeast Wyoming -- within WW 568. Here, local severe risk continues. Otherwise, a continued diurnally driven decrease in storm intensity is expected through watch expiration. ..Goss.. 08/11/2019 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LBF...UNR...CYS...BYZ...GGW...RIW...TFX...MSO... LAT...LON 46151044 45941209 46771247 46911068 46490559 44910197 42710179 43320697 44920754 46150994 46151044 Read more

SPC Severe Thunderstorm Watch 568 Status Reports

6 years ago
WW 0568 Status Updates
STATUS REPORT ON WW 568 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 NNW DGW TO 35 SW GCC TO 40 E SHR TO 55 NNE SHR TO 55 E BIL TO 20 N BIL TO 30 WSW 3HT. ..COOK..08/11/19 ATTN...WFO...BYZ...UNR...RIW... STATUS REPORT FOR WS 568 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC011-037-065-075-087-103-107-110240- MT . MONTANA COUNTIES INCLUDED ARE CARTER GOLDEN VALLEY MUSSELSHELL POWDER RIVER ROSEBUD TREASURE WHEATLAND SDC019-033-047-081-093-102-103-110240- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE BUTTE CUSTER FALL RIVER LAWRENCE MEADE OGLALA LAKOTA PENNINGTON WYC005-011-045-110240- WY . WYOMING COUNTIES INCLUDED ARE Read more

SPC Severe Thunderstorm Watch 567 Status Reports

6 years ago
WW 0567 Status Updates
STATUS REPORT ON WW 567 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 WNW MYL TO 15 ENE MYL TO 30 SSW SMN TO 30 WNW MQM TO 20 SSE DLN TO 25 ENE DLN TO 10 ESE HLN TO 25 E GTF. ..COOK..08/11/19 ATTN...WFO...BOI...MSO...PIH...TFX... STATUS REPORT FOR WS 567 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IDC001-003-015-027-037-039-045-073-075-085-087-110240- ID . IDAHO COUNTIES INCLUDED ARE ADA ADAMS BOISE CANYON CUSTER ELMORE GEM OWYHEE PAYETTE VALLEY WASHINGTON MTC007-027-031-043-045-057-059-110240- MT . MONTANA COUNTIES INCLUDED ARE BROADWATER FERGUS GALLATIN JEFFERSON JUDITH BASIN MADISON MEAGHER 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 Read more

SPC Aug 11, 2019 0100 UTC Day 1 Convective Outlook

6 years ago
SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0743 PM CDT Sat Aug 10 2019 Valid 110100Z - 111200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE NORTHERN ROCKIES/HIGH PLAINS AND THE CENTRAL HIGH PLAINS... ...SUMMARY... Scattered severe thunderstorms will continue this evening across the northern Rockies region into the central High Plains. Wind and hail remain the primary threats. ...01z Update... Scattered robust convection continues across the northern Rockies, arcing east-southeast over southern MT into the Black Hills region. This activity is partly driven by a weak short-wave trough that is ejecting across western MT ahead of the main Pacific northwest trough. Given the large-scale support, scattered severe thunderstorms should focus along a corridor primarily across southern MT into northeast WY through late evening. Farther south across the central High Plains, scattered thunderstorms developed within easterly low-level flow regime over northeast CO/southwest NE. This activity is beginning to cluster and an MCS may ultimately evolve over south-central NE/north-central KS along nose of LLJ. Have adjusted severe probs to account for this higher severe probability development. ..Darrow.. 08/11/2019 Read more

SPC Aug 11, 2019 0100 UTC Day 1 Convective Outlook

6 years ago
SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0743 PM CDT Sat Aug 10 2019 Valid 110100Z - 111200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE NORTHERN ROCKIES/HIGH PLAINS AND THE CENTRAL HIGH PLAINS... ...SUMMARY... Scattered severe thunderstorms will continue this evening across the northern Rockies region into the central High Plains. Wind and hail remain the primary threats. ...01z Update... Scattered robust convection continues across the northern Rockies, arcing east-southeast over southern MT into the Black Hills region. This activity is partly driven by a weak short-wave trough that is ejecting across western MT ahead of the main Pacific northwest trough. Given the large-scale support, scattered severe thunderstorms should focus along a corridor primarily across southern MT into northeast WY through late evening. Farther south across the central High Plains, scattered thunderstorms developed within easterly low-level flow regime over northeast CO/southwest NE. This activity is beginning to cluster and an MCS may ultimately evolve over south-central NE/north-central KS along nose of LLJ. Have adjusted severe probs to account for this higher severe probability development. ..Darrow.. 08/11/2019 Read more

SPC Aug 11, 2019 0100 UTC Day 1 Convective Outlook

6 years ago
SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0743 PM CDT Sat Aug 10 2019 Valid 110100Z - 111200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE NORTHERN ROCKIES/HIGH PLAINS AND THE CENTRAL HIGH PLAINS... ...SUMMARY... Scattered severe thunderstorms will continue this evening across the northern Rockies region into the central High Plains. Wind and hail remain the primary threats. ...01z Update... Scattered robust convection continues across the northern Rockies, arcing east-southeast over southern MT into the Black Hills region. This activity is partly driven by a weak short-wave trough that is ejecting across western MT ahead of the main Pacific northwest trough. Given the large-scale support, scattered severe thunderstorms should focus along a corridor primarily across southern MT into northeast WY through late evening. Farther south across the central High Plains, scattered thunderstorms developed within easterly low-level flow regime over northeast CO/southwest NE. This activity is beginning to cluster and an MCS may ultimately evolve over south-central NE/north-central KS along nose of LLJ. Have adjusted severe probs to account for this higher severe probability development. ..Darrow.. 08/11/2019 Read more

SPC Aug 11, 2019 0100 UTC Day 1 Convective Outlook

6 years ago
SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0743 PM CDT Sat Aug 10 2019 Valid 110100Z - 111200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE NORTHERN ROCKIES/HIGH PLAINS AND THE CENTRAL HIGH PLAINS... ...SUMMARY... Scattered severe thunderstorms will continue this evening across the northern Rockies region into the central High Plains. Wind and hail remain the primary threats. ...01z Update... Scattered robust convection continues across the northern Rockies, arcing east-southeast over southern MT into the Black Hills region. This activity is partly driven by a weak short-wave trough that is ejecting across western MT ahead of the main Pacific northwest trough. Given the large-scale support, scattered severe thunderstorms should focus along a corridor primarily across southern MT into northeast WY through late evening. Farther south across the central High Plains, scattered thunderstorms developed within easterly low-level flow regime over northeast CO/southwest NE. This activity is beginning to cluster and an MCS may ultimately evolve over south-central NE/north-central KS along nose of LLJ. Have adjusted severe probs to account for this higher severe probability development. ..Darrow.. 08/11/2019 Read more

SPC Aug 11, 2019 0100 UTC Day 1 Convective Outlook

6 years ago
SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0743 PM CDT Sat Aug 10 2019 Valid 110100Z - 111200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE NORTHERN ROCKIES/HIGH PLAINS AND THE CENTRAL HIGH PLAINS... ...SUMMARY... Scattered severe thunderstorms will continue this evening across the northern Rockies region into the central High Plains. Wind and hail remain the primary threats. ...01z Update... Scattered robust convection continues across the northern Rockies, arcing east-southeast over southern MT into the Black Hills region. This activity is partly driven by a weak short-wave trough that is ejecting across western MT ahead of the main Pacific northwest trough. Given the large-scale support, scattered severe thunderstorms should focus along a corridor primarily across southern MT into northeast WY through late evening. Farther south across the central High Plains, scattered thunderstorms developed within easterly low-level flow regime over northeast CO/southwest NE. This activity is beginning to cluster and an MCS may ultimately evolve over south-central NE/north-central KS along nose of LLJ. Have adjusted severe probs to account for this higher severe probability development. ..Darrow.. 08/11/2019 Read more

SPC Severe Thunderstorm Watch 567 Status Reports

6 years ago
WW 0567 Status Updates
STATUS REPORT ON WW 567 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1692 ..COOK..08/10/19 ATTN...WFO...BOI...MSO...PIH...TFX... STATUS REPORT FOR WS 567 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IDC001-003-015-027-035-037-039-045-049-059-073-075-085-087- 110040- ID . IDAHO COUNTIES INCLUDED ARE ADA ADAMS BOISE CANYON CLEARWATER CUSTER ELMORE GEM IDAHO LEMHI OWYHEE PAYETTE VALLEY WASHINGTON MTC001-007-023-027-031-039-043-045-049-057-059-061-063-077-081- 093-110040- MT . MONTANA COUNTIES INCLUDED ARE BEAVERHEAD BROADWATER DEER LODGE FERGUS GALLATIN GRANITE JEFFERSON JUDITH BASIN LEWIS AND CLARK MADISON MEAGHER MINERAL MISSOULA POWELL RAVALLI Read more

SPC Severe Thunderstorm Watch 568 Status Reports

6 years ago
WW 0568 Status Updates
STATUS REPORT ON WW 568 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1692 ..COOK..08/10/19 ATTN...WFO...BYZ...UNR...RIW... STATUS REPORT FOR WS 568 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC003-009-011-037-065-067-075-087-095-097-103-107-111-110040- MT . MONTANA COUNTIES INCLUDED ARE BIG HORN CARBON CARTER GOLDEN VALLEY MUSSELSHELL PARK POWDER RIVER ROSEBUD STILLWATER SWEET GRASS TREASURE WHEATLAND YELLOWSTONE SDC019-033-047-081-093-102-103-110040- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE BUTTE CUSTER FALL RIVER LAWRENCE MEADE OGLALA LAKOTA PENNINGTON WYC003-005-011-019-033-043-045-110040- Read more

SPC MD 1692

6 years ago
MD 1692 CONCERNING SEVERE THUNDERSTORM WATCH 567...568... FOR PORTIONS OF THE PACIFIC NORTHWEST EASTWARD TO THE NORTHERN HIGH PLAINS
Mesoscale Discussion 1692 NWS Storm Prediction Center Norman OK 0553 PM CDT Sat Aug 10 2019 Areas affected...portions of the Pacific Northwest eastward to the northern high Plains Concerning...Severe Thunderstorm Watch 567...568... Valid 102253Z - 110100Z The severe weather threat for Severe Thunderstorm Watch 567, 568 continues. SUMMARY...Scattered strong/locally severe storms continue across a large portion of the northern Intermountain region, and vicinity. Locally damaging winds will remain the primary risk, though large hail also remains possible locally. DISCUSSION...The latest WV loop shows an upper low centered over northern California, with a pronounced dry slot extending from central and southern California across the Great Basin and into southeast Idaho. On either side of -- and near the nose of -- this dry slot, scattered thunderstorms continue to develop late this afternoon. Given the relatively moist/unstable airmass in an anticyclonic arc from eastern portions of the Pacific Northwest across western and northern Idaho and Montana, and into the northern high Plains, expect storms to continue across this region for several hours. A belt of fast/diffluent flow resides across this region -- sandwiched between the northern California upper low, and stout ridging over the central U.S. This flow will continue to support organized/rotating storms, locally capable of gusty/damaging winds and hail. ..Goss.. 08/10/2019 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...ABR...BIS...LBF...UNR...CYS...BYZ...GGW...RIW... TFX...PIH...MSO...BOI...LKN...OTX...PDT... LAT...LON 42021689 43411889 45031933 46641810 46811623 47431527 47640889 45710139 42870119 42610259 43230651 44201041 44501382 44031450 41921479 41681651 42021689 Read more