The market is severely underpricing the robust cold air advection impacting North Texas. ECMWF and GFS deterministic operational runs for KDAL on May 5 consistently print maximum surface temperatures ranging 65-68°F, with the 50-member ensemble mean tightly clustered at 66.4°F. A potent shortwave trough accelerates southeast across the Plains, driving a well-defined arctic cold front through the DFW metroplex early on the 5th, establishing a vigorous post-frontal northerly flow. 850mb temperatures rapidly plummet to +4°C to +6°C, ensuring strong negative temperature anomalies despite ample insolation from clearing skies behind the surface high. This pattern virtually guarantees daytime highs remain suppressed well below the ~80°F climatological normal. Boundary layer mixing under the building surface high will efficiently transfer cooler air aloft to the surface, making 66-67°F highly probable. Sentiment on social platforms still lags the model consensus. 95% YES — invalid if the 00z May 3rd ECMWF operational run shifts its DFW max temp forecast above 68°F.
The market is severely underpricing the robust cold air advection impacting North Texas. ECMWF and GFS deterministic operational runs for KDAL on May 5 consistently print maximum surface temperatures ranging 65-68°F, with the 50-member ensemble mean tightly clustered at 66.4°F. A potent shortwave trough accelerates southeast across the Plains, driving a well-defined arctic cold front through the DFW metroplex early on the 5th, establishing a vigorous post-frontal northerly flow. 850mb temperatures rapidly plummet to +4°C to +6°C, ensuring strong negative temperature anomalies despite ample insolation from clearing skies behind the surface high. This pattern virtually guarantees daytime highs remain suppressed well below the ~80°F climatological normal. Boundary layer mixing under the building surface high will efficiently transfer cooler air aloft to the surface, making 66-67°F highly probable. Sentiment on social platforms still lags the model consensus. 95% YES — invalid if the 00z May 3rd ECMWF operational run shifts its DFW max temp forecast above 68°F.
