SPC Mar 28, 2024 0600 UTC Day 1 Convective Outlook
2024-03-28
SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1232 AM CDT Thu Mar 28 2024 Valid 281200Z - 291200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected. ...Discussion... Offshore flow will dominate the Gulf/Atlantic Coasts during the day1 period as the primary synoptic front advances east ahead of a pronounced upper trough. Early in the period, surface wind shift will extend from the NC Outer Banks region, southwest across the central FL Peninsula. Scattered thunderstorms will likely be ongoing along this boundary, aided in part by large-scale forcing ahead of the upper trough. While strong deep-layer flow/shear will be noted, poor lapse rates and weak buoyancy do not appear conducive for particularly robust updrafts along the advancing wind shift. Upstream across the western US, very cold midlevel temperatures will overspread the Pacific Northwest/northern Rockies/northern Great Basin. 500mb jet is forecast to sag south across CA/NV/UT into the Four Corners region during the latter half of the period. As a result, very steep lapse rates will be generated north of the jet, such that weak buoyancy is expected to support scattered convection. Given the cold profiles, some risk for thunderstorms will be noted, as low-topped convection could attain heights necessary for lightning discharge. ..Darrow/Squitieri.. 03/28/2024
SPC Mar 28, 2024 0600 UTC Day 2 Convective Outlook
2024-03-28
SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1240 AM CDT Thu Mar 28 2024 Valid 291200Z - 301200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe thunderstorms appear unlikely on Friday. ...Synopsis and Discussion... An upper trough/low will dig southward very near the northern and central CA Coast on Friday. Isolated lightning flashes may occur across parts of coastal central CA through the period, as cold mid-level temperatures aid in the development of weak MUCAPE and ascent associated with the upper trough/low overspreads this region. A separate area of isolated thunderstorm potential, mainly related to orographic lift, also remains apparent over portions of central Rockies. Farther east, a modified Gulf airmass will slowly advance northward from the southern Plains into parts of the mid MS Valley and Upper Midwest through Friday evening. The northern extent of this low-level moisture plume should remain rather shallow and limited, with surface dewpoints no greater than the low 50s expected. Still, a low-amplitude shortwave trough that will eject across the northern/central Plains should aid in weak cyclogenesis across the Upper Midwest, with a related weak surface low forecast to be located along/near the MO/IA border Friday evening. These features should provide sufficient lift, in tandem with a strengthening southwesterly low-level jet, to support thunderstorm development mainly Friday evening into early Saturday morning from parts of the mid MO Valley into the Midwest and southern Great Lakes. Even though deep-layer shear is forecast to become strong in this time frame, convection will probably tend to remain elevated. Generally weak MUCAPE (500-1000 J/kg) should limit the threat for severe-caliber hail, although small hail with the most robust updrafts appears possible. ..Gleason.. 03/28/2024
SPC Mar 28, 2024 0730 UTC Day 3 Severe Thunderstorm Outlook
2024-03-28
SPC 0730Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0226 AM CDT Thu Mar 28 2024 Valid 301200Z - 311200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe thunderstorms are not forecast on Saturday. ...Synopsis and Discussion... A deep, closed upper low initially off the coast of central CA should move slowly southward along/near the southern CA Coast on Saturday. Cold mid-level temperatures and strong forcing for ascent associated with an enhanced mid/upper-level jet should support weak instability, and the potential for isolated lighting flashes with any low-topped convection that can develop from parts of central into southern CA. Organized severe thunderstorms appear unlikely across this region given the meager MUCAPE forecast. Isolated thunderstorms may occur Saturday over parts of the southern Great Lakes/OH Valley, as a low-amplitude shortwave trough moves east-southeastward across these areas. A weak surface low is also forecast to develop eastward over this region in tandem with the shortwave trough. Limited low-level moisture, with surface dewpoints generally in the low 50s, should temper how much instability can develop through Saturday afternoon given the presence of modest to poor mid-level lapse rates. This will likely hinder the overall severe threat across the OH Valley, even though deep-layer shear conditionally supports the potential for organized convection. Finally, occasional lightning flashes may occur with elevated convection that develops late Saturday night into early Sunday morning across parts of NE into southwestern IA and northern MO. Low-level moisture is expected to gradually return northward across the southern/central Plains through the day, and this area will be on northern fringe of this process. Strong forcing associated with a southerly low-level jet may provide sufficient lift for parcels to reach their LFC. Still, forecast MUCAPE appears too weak to support a meaningful hail threat through the end of the period (early Sunday morning). ..Gleason.. 03/28/2024
Fair and 30 F at Dayton / Wright-Patterson Air Force Base, OH
2024-03-28
Winds are Calm. The pressure is 1022.6 mb and the humidity is 80%.
Last Updated on Mar 28 2024, 1:55 am EDT.
Winds are Calm. The pressure is 1022.6 mb and the humidity is 80%.
Last Updated on Mar 28 2024, 1:55 am EDT.
Last Updated on Mar 28 2024, 1:55 am EDT.
A Few Clouds and 45 F at Dayton / Wright-Patterson Air Force Base, OH
2024-03-28
Winds are West at 10.4 MPH (9 KT). The pressure is 1020.3 mb and the humidity is 51%.
The wind chill is 40.
Last Updated on Mar 27 2024, 6:55 pm EDT.
Winds are West at 10.4 MPH (9 KT). The pressure is 1020.3 mb and the humidity is 51%.
The wind chill is 40.
Last Updated on Mar 27 2024, 6:55 pm EDT.
The wind chill is 40.
Last Updated on Mar 27 2024, 6:55 pm EDT.
SPC Day 3-8 Fire Weather Outlook
2024-03-28
SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0443 PM CDT Wed Mar 27 2024 Valid 291200Z - 041200Z Strong but predominately zonal mid-level flow is expected across the western US to start the extended forecast period. This pattern will quickly amplify into the weekend as a deepening upper trough moves onshore across southern CA. Strong flow aloft will overspread the southern Plains deepening a lee low and enhancing surface winds. Hot, dry, and windy conditions will support widespread elevated to critical conditions through the weekend and potentially into early next week. Model guidance begins to vary after this with colder and wetter conditions possible behind a cold front expected toward the end of the extended forecast period. ...Southern High Plains... Southwest flow aloft is forecast to quickly strengthen late this week and into the weekend ahead of the deepening Pacific trough. As flow aloft intensifies, several weak perturbations are forecast to move over the southern Rockies into the southern Plains Starting D3/Fri. Aided by the mid-level ascent, the surface lee trough should begin to deepen and bolster westerly surface winds through the afternoon. Forecast soundings show sustained winds of 15-20 mph with higher gusts likely across eastern NM and the TX Panhandle. With temperatures forecast to warm into the 70s, the dry air mass should allow for diurnal RH minimums of 15-20%. Elevated fire-weather conditions are likely, with some hints that localized critical concerns are also possible but more uncertain. Flow aloft should weaken slightly D4/Saturday under the influence of shortwave ridging as the upper air pattern continues to amplify ahead of the western US trough. While weaker, westerly winds should still support lee troughing and 15-20 mph surface winds. Warming temperatures beneath the transient ridging should also keep RH minimums near 15% with elevated fire-weather conditions possible. More significant fire-weather conditions are expected D5/Sun into D6/Mon. The main upper trough will begin to eject eastward spreading 80-100 kt of mid-level flow over the southern Plains. A strong lee low will develop, enhancing southwest surface winds to 25-35 mph and higher gusts. With afternoon RH values in the 10-15% range, widespread critical fire-weather conditions appear likely across parts of west TX and eastern NM. This risk may continue into D6/Monday as the dryline and upper-level systems shift eastward. However, confidence in placement of these features remains lower owing to potential thunderstorms and the arrival of a cold front in the wake of the surface low. Fire-weather concerns appear much less likely through the end of the extended forecast period as below normal temperatures and wetter surface conditions are forecast to develop. ..Lyons.. 03/27/2024 ...Please see www.spc.noaa.gov/fire for graphic product...