Fire Weather Outlook Discussion
Issued by NWS
Issued by NWS
604 FNUS22 KWNS 061952 FWDDY2 Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0251 PM CDT Thu Jun 06 2024 Valid 071200Z - 081200Z A few minor adjustments were made to the previous forecast to include a small Elevated area across the High Plains of east central and southeastern NM, and to extend a portion of the IsoDryT area. Sustained, drying south-southwesterly surface winds around 15-20 mph are expected to develop across southeast NM Friday afternoon, as a lee surface trough deepens over the OK/TX Panhandles. A trend of relatively stronger mid-level flow has also been noted over this area (higher momentum transfer), which has led to enough confidence to introduce elevated conditions. Several forecast soundings in and around the IsoDryT area continue to indicate the potential for very high cloud bases Friday afternoon, with only localized appreciable rainfall anticipated over the receptive fuels of the Southwest. Isolated dry lightning strikes appear more likely across a slightly broader area atop a mid-to-upper level ridge, with several embedded perturbations traversing the southern Rockies. Another IsoDryT area was considered for southern NV, but relatively higher precipitation amounts should keep dry strikes limited there. ..Barnes.. 06/06/2024 .PREV DISCUSSION... /ISSUED 0154 AM CDT Thu Jun 06 2024/ ...Synopsis... Upper ridging over the Southwestern US will weaken slightly as several embedded perturbations crest the ridge and move into the Southwest and southern Rockies Friday. To the east, northwest flow in the wake of a departing trough will continue over the eastern half of the CONUS. Elevated fire-weather conditions and a few dry thunderstorms are possible over parts of the Southwestern US. ...Desert Southwest... As the upper ridge weakens and shifts to the east, enhanced mid-level flow associated with several weak perturbations will move over parts of the Southwest and southern Rockies. While not overly strong, 35-40 kt of mid-level flow will likely support some increase of the surface winds to 15-20 mph over parts of the southern Great Basin and northern AZ. Dry and warm surface conditions will be in place with RH below 15% atop dry fuels. A few hours of elevated fire-weather conditions are possible. Farther east, isolated to widely scattered thunderstorms are expected over the higher terrain of eastern AZ into much of NM. Several days of weak upslope flow and low-level moistening behind a weakening cold front should be sufficient to support thunderstorms. PWATS values of 0.75 inches will continue to favor drier storms with limited wetting rainfall. Storm coverage is also expected to be higher than previous days given the stronger forcing for ascent from the passing shortwave troughs. Thus, lightning ignition potential appears high enough to warrant an IsoDryT area. ...Please see www.spc.noaa.gov/fire for graphic product... $$