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Flash Flood Guidance
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Issued by NWS
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600 AWUS01 KWNH 142024 FFGMPD TXZ000-OKZ000-KSZ000-NEZ000-COZ000-NMZ000-WYZ000-150222- Mesoscale Precipitation Discussion 0438 NWS Weather Prediction Center College Park MD 423 PM EDT Fri Jun 14 2024 Areas affected...Portions of the Central and Southern High Plains...including the Front Range Concerning...Heavy rainfall...Flash flooding possible Valid 142022Z - 150222Z SUMMARY...Showers and thunderstorms will continue to organize and expand in coverage over the next several hours across portions of the central and southern High Plains, including the Front Range. Isolated to widely scattered instances of flash flooding will be possible. DISCUSSION...The GOES WV satellite imagery shows a well-defined and rather strong mid-level shortwave trough and associated closed low ejecting northeast out of the Southwest and into the central Rockies. This energy is fostering strong upper-level divergence downstream across portions of the central and southern High Plains which is also encouraging a strengthening of low-level southerly flow and the pooling of a more concentrated north/south axis of instability and moisture convergence. MLCAPE of 1500 to 2000 J/kg are pooled up across the High Plains in a north/south fashion from southeast WY down through much of eastern CO and northeast NM. A southerly low-level jet of 20 to 30 kts is in place and there is also proximity of a quasi-stationary front draped from near the OK Panhandle northwestward through southeast CO and then north up along the Front Range. Already there are numerous clusters of heavy showers and thunderstorms developing near the Sangre De Cristo Mountains and adjacent areas of northeast NM and southeast CO, with additional clusters of convection noted farther north near the Front Range and out across parts of southeast WY and southwest NE. As the stronger shortwave energy/height falls upstream begin to overspread the region, there should be a more organized and expansive threat of convection across the High Plains heading through the evening hours. This will be characterized by supercell convection evolving and locally consolidating into multiple MCS clusters before then advancing off to the east. Expecting rainfall rates with the stronger storms to reach 1 to 2 inches/hour, with some localized storm totals reaching 2 to 4+ inches where any cell-mergers and repeating cell-activity occurs. This may result in some isolated to widely scattered instances of flash flooding heading into the evening hours. Orrison ...Please see www.wpc.ncep.noaa.gov for graphic product... ATTN...WFO...ABQ...AMA...BOU...CYS...DDC...GLD...LBF...LUB... PUB... ATTN...RFC...ABRFC...MBRFC...WGRFC...NWC... LAT...LON 41890329 41610118 40410042 37960068 35110214 34420366 34820538 35420578 36360575 37590547 39500534 40500527 41280472