textproduct: Norman

KEY MESSAGES

Updated at 549 PM CDT Tue May 19 2026

- Cool, below normal temperatures today through Thursday. Near normal temperatures will return by the end of the week through early next week.

- Shower and storm chances continue Wednesday through early next week. A few strong storms may be possible late this week.

NEAR TERM

(Rest of today and tonight) Issued at 214 PM CDT Tue May 19 2026

The cold front has moved through all except the southeastern part of the forecast area, and the significant thunderstorms have moved out. But winds above the frontal boundary continue to be south/southwesterly and isentropic lift is developing around the 295K/300K surfaces. A few showers are beginning to develop this afternoon and are expected to increase as the southerly flow above the front (and therefore the isentropic lift) increases this tonight. Most models (the NAM being the exception) show very little elevated instability, so severe weather is not expected.

SHORT TERM

(Wednesday through Thursday night) Issued at 214 PM CDT Tue May 19 2026

Rain chances decrease early Wednesday as the isentropic lift decreases. But then shower/storm chances will increase Wednesday evening and especially Thursday as a mid-level trough approaches. Rainfall looks to be widespread on Thursday with this system. We will still be in this cooler post-frontal airmass, so no surface instability is expected and severe weather potential is low. Precipitation chances will decrease from west to east Thursday night as the trough moves to the east. High temperatures will be cool both Wednesday and Thursday.

LONG TERM

(Friday through Monday) Issued at 1206 AM CDT Tue May 19 2026

A subtropical jet, with perturbations within the broader mid-level flow, will overspread the southern Plains through next weekend. This continuous mid-level flow will support daily thunderstorm chances through the weekend across our area. At this time, there is low confidence in severe weather during this timeframe. Temperatures will continue to be closer to seasonable through early next week.

AVIATION

(00Z TAFS) Issued at 549 PM CDT Tue May 19 2026

MVFR and IFR conditions will be predominate through the forecast period, exception being at CSM where there will be periods of VFR conditions at both the beginning and at the end of the forecast period and at WWR where VFR conditions are expected to continue through the day Wednesday. Will also be periods of rain, storms, drizzle and fog overnight and for a while Wednesday morning, which could lower visibility to around 3 miles at times, before chances lower below mentionable.

PRELIMINARY POINT TEMPS/POPS

Oklahoma City OK 54 70 58 71 / 60 20 60 90 Hobart OK 52 73 56 73 / 50 20 80 80 Wichita Falls TX 56 76 60 76 / 60 30 80 80 Gage OK 46 70 51 69 / 0 20 80 80 Ponca City OK 52 67 55 70 / 40 10 60 80 Durant OK 62 78 65 76 / 40 30 50 90

OUN WATCHES/WARNINGS/ADVISORIES

OK...None. TX...None.