3 years 6 months ago
SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook RESENT 1
NWS Storm Prediction Center Norman OK
0657 AM CST Wed Jan 19 2022
Valid 191300Z - 201200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM EAST TEXAS TO
SOUTHERN ARKANSAS AND WESTERN MISSISSIPPI...
...SUMMARY...
Damaging thunderstorm winds, isolated large hail, and a tornado or
two may occur from afternoon and evening thunderstorms, mainly from
east Texas to southern Arkansas and western Mississippi.
...Synopsis...
In mid/upper levels, a series of shortwaves will contribute to the
sharpening of a positively tilted mean trough from eastern Canada
across the central Plains and southwestern CONUS to northwestern MX,
by 12Z tomorrow. A downstream perturbation -- apparent in moisture-
channel imagery near the TX/NM line -- will eject east-northeastward
into confluent flow aloft and deamplify through the period. By 00Z,
the feature should be located from the Ozarks to north-central TX.
By 12Z, it should extend from WV southwestward toward MEM.
Surface analysis at 11Z showed a substantial cyclone centered over
ON northeast of Lake Huron -- ahead of a northern-stream, mid/upper-
level shortwave trough. A cold front was drawn across southeastern
Lower MI, western IN, southern IL, southeastern MO, and northwestern
AR, to a weak frontal-wave low over east-central OK that is related
to the approaching southern-stream perturbation. The cold front
extended from there across northwest TX, the TX South Plains, and
east-central/north-central NM. By 00Z, the cold front should extend
across eastern NY, southwestern PA, eastern KY, mid TN, northern
parts of MS/LA, and southeast/south-central TX. By 12Z, the front
should reach the Delmarva Peninsula, western NC, northern GA,
southern parts of MS/LA, and the northwestern Gulf.
...East TX to lower Mississippi Valley region...
Scattered thunderstorms should form this afternoon into tonight
along/ahead of the surface cold front, between the Mid-South region
and southeast TX. Damaging to marginally severe gusts and isolated
large hail are possible, especially over LA/TX portions of the
outlook areas, along with a tornado or two.
Lift should occur both with the front and a prefrontal, warm-sector
convergence zone in a warm-advection plume. Diurnal heating of an
increasingly moist wedge of partially modified return-flow air
(surface dew points of upper 50s to mid 60s F) will weaken MLCINH to
negligible amounts by around 21Z. This will help to offset modest
but adequate mid/upper-level lapse rates and yield MLCAPE ranging
from around 500-800 J/kg over east-central/southeastern AR to 800-
1200 J/kg in east TX and northwestern LA. Initial discrete to
partly linear afternoon development is expected, amidst mean-wind
and deep-shear vectors oriented about 30 deg rightward of convective
lift axes. Forecast soundings reasonably depict around 100 kt
anvil-level winds and similar magnitudes of cloud-layer shear, with
35-45-kt effective-shear magnitudes, supporting both organized
multicells and at least some supercell potential. After the initial
mixed-mode phase, activity should become more linear, with embedded
supercells and LEWPs/mesocirculations possible.
With time this evening and tonight, the front will impinge on the
warm sector and prefrontal ascent zone, faster than the inland
advance of favorable boundary-layer theta-e. This ultimately will
narrow the surface-based warm sector from north to south across the
lower Mississippi Valley region late this evening and tonight. In
addition, the lack of substantial upper support (with the
perturbation's weakening and pulling away to the north) will
contribute to declining overnight severe potential as well.
..Edwards/Broyles.. 01/19/2022
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3 years 6 months ago
SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0645 AM CST Tue Jan 18 2022
Valid 181300Z - 191200Z
...NO THUNDERSTORM AREAS FORECAST...
...SUMMARY...
No thunderstorm areas are expected over the conterminous U.S.
...Synopsis/Discussion...
Following the departure of the strong subsynoptic trough from the
Northeast, nearly zonal mid/upper-level flow is expected for most of
the period over the central/eastern CONUS. Positively tilted mean
troughing is expected to develop by the end of the period, over the
north-central through southwestern CONUS. This process will be
related to partial phasing of these northern and southern stream
perturbations, respectively:
1. A strong shortwave trough -- initially evident in moisture-
channel imagery over the northernmost reaches of the Canadian
Prairie Provinces. This feature should move southeastward and
amplify, reaching a position from near James Bay to Lake Superior,
northern MN, ND, and eastern MT, by 12Z tomorrow.
2. A broad, but not particularly strong, perturbation initially
over southern parts of NV/CA and southwestward over Pacific waters
west of northern Baja. This feature should move eastward to the
southern High Plains by 12Z, aiding in low-level warm advection
ahead of the cold front described below.
At the surface, 11Z analysis showed a low over the ND/MB line, near
the International Peace Garden, related to the northern-stream
mid/upper trough. A warm front was drawn southeastward to Lake
Michigan, with a cold front arching across southwestern ND and
southeastern/south-central to northwestern MT. The cyclone should
deepen and move eastward to lake Superior by 00Z, with cold front
reaching southeastern MN, south-central NE and eastern CO. By 12Z,
the cold front should extend across southeastern Lower MI, southern
IL, the Ozarks, southwestern OK, and east-central NM.
A separate, weaker low initially drawn near AMA will move east-
southeastward down the Red River Valley -- ahead of the southern-
stream perturbation -- and should be overtaken by the cold front
within a couple hours of the end of the period. Given the
continental/polar air mass still present over the Gulf and central/
eastern CONUS following the last major cold front, return-flow
marine modification ahead of the newer cold front will be too
limited to yield enough moisture/instability for thunderstorms,
until the day-2 period.
..Edwards/Broyles.. 01/18/2022
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3 years 6 months ago
01-13-22 Update: Crews have completed 200 acres on the Pacheco Canyon prescribed pile burn this week. Due to ventilation rates, fire managers decided not to burn today. The plan is to continue ignitions on the Pacheco Canyon piles tomorrow and, if necessary, into Saturday if conditions are favorable. On Wednesday, the BIA and Pueblo of Tesuque implemented the 111-acre Vigil Grant prescribed pile burn near the Pacheco Canyon treatment
3 years 6 months ago
Carter County Commissioners implemented a burn ban on Dec. 20 and extended it through Jan. 17. The ban made it unlawful for a person "to set fire to any forest, grass, range crop or other wild lands or to build a campfire, bonfire, burn or ignite fireworks, or to burn trash or other materials that may cause a forest, grass, range crop or other wild lands fire."
Ardmoreite.com (Okla.), Jan 7, 2022
3 years 6 months ago
Texas Gov. Greg Abbott issued a disaster declaration due to exceptional drought posing a threat of imminent disaster in Andrews, Baylor, Borden, Brewster, Cameron, Carson, Castro, Childress, Collingsworth, Cottle, Culberson, Dallam, Dawson, Deaf Smith, Dimmit, Fisher, Foard, Gray, Hansford, Hardeman, Hartley, Haskell, Hemphill, Hidalgo, Howard, Hutchinson, Jones, Knox, Lamar, Martin, Maverick, Midland, Moore, Motley, Ochiltree, Oldham, Pecos, Potter, Presidio, Randall, Roberts, Scurry, Sherman, Stonewall, Terrell, Throckmorton, Upton, Ward, Wheeler, Wichita, Wilbarger, and Winkler counties.
Office of the Governor - Greg Abbott (Texas), Jan 6, 2022