textproduct: Norman

KEY MESSAGES

Updated at 118 PM CDT Sun Jul 19 2026

- Excessive heating returning to parts of our area today and Monday becoming more widespread Tuesday with heat indices exceeding 105 degrees

- Excessive heating continues mid-week on with a backdoor cold front providing some relief on Wednesday only across northern Oklahoma

- Low chances for isolated thunderstorms this afternoon across southern Oklahoma and western north Texas then dry all next week

NEAR TERM

(Rest of today and tonight) Issued at 118 PM CDT Sun Jul 19 2026

A Heat Advisory has been issued this afternoon through sundown across seven of our counties in southeast Oklahoma and along the Red River due to excessive heating.

Seasonably normal hot & muggy today with afternoon highs in the mid to upper 90s with a heat index just over 100 in some locations. NBM default was slightly cool-biased so increased a couple degrees warmer using the NBM 50th percentile temperatures for this afternoons MaxT. Will begin headlines for a 7-county Heat Advisory this afternoon in southeast Oklahoma and along the Red River where heat indices will exceed 105 degrees. Heat indices at a couple of Mesonet sites in southeast Oklahoma are already at advisory criteria. Expecting another day of widespread CU cover as we heat to the convective temperatures. Our persisting upper low over western Texas has opened into an inverted trough extending over southwest Oklahoma with increasing low-end moderate surface-based instability along the Red River. Some of the CU could develop into scattered rain up to isolated thunderstorms east of this trough along the Red River. As a result added rain/storm POPs for this afternoon along the Red River across far southern Oklahoma and western north Texas. However keeping POPs very low at 15% due to being isolated with most of that area staying dry. Not expecting any of these storms to be severe but downdraft CAPE values up to 1000 J/kg suggest some of these storms could produce brief strong wind gusts.

SHORT TERM

(Monday through Tuesday night) Issued at 118 PM CDT Sun Jul 19 2026

A Heat Advisory will be in effect Monday afternoon through sundown across portions of northcentral through east-central and southeast Oklahoma.

An upper ridge "heat dome" will continue building over much of the western half of the country maintaining a heating trend with well above normal temperatures across the Southern Plains. Upper 90s highs for Monday heating to widespread triple digits (100-106) on Tuesday. Strong gulf-based moisture transport perhaps enhanced by a potential tropical depression will keep our lower-levels very moist and muggy increasing heat indices to excessive heating. Widespread triple digit heat indices will be likely on Monday and increasing Tuesday with more widespread excessive heating (105-110). As a result will have a Heat Advisory to be in effect for Monday afternoon until sundown across 12 of our counties in northcentral through east-central and southeast Oklahoma and there will likely be an even more widespread advisory across our area on Tuesday. We will also see warmer above normal muggy nights with lows in the mid to upper 70s. Not expecting to break any warmest minimum low records on Tuesday (which would be lower 80s) but will be closer to those records. The only bit of relief from direct afternoon sun will be some scattered cloud cover expected to develop Monday & Tuesday afternoons providing some periods of ground shade.

LONG TERM

(Wednesday through Saturday) Issued at 128 AM CDT Sun Jul 19 2026

The cold front will slide toward the I-40 corridor by late Wednesday, but any cooling looks to remain confined to northern Oklahoma where some locations across north central Oklahoma will see highs in the middle 90s compared to low 100s elsewhere. Again heat advisory level heat indices are expected to the south of the boundary across much of central into southern Oklahoma and north Texas.

Front will lift back north early Thursday with breezy south winds returning to the area. From this point through at least Saturday and likely longer, the upper ridge, centered nearly directly overhead, remains in control with no real signal for any additional chances of precip. Highs will remain well above normal with daily heat headlines likely needed into the weekend.

AVIATION

(18Z TAFS) Issued at 1213 PM CDT Sun Jul 19 2026

VFR conditions with light south to southwest winds. A few isolated showers and storms will be possible this afternoon near and south of the Red River, but chances at any particular site are too low for mention.

Day

PRELIMINARY POINT TEMPS/POPS

Oklahoma City OK 75 98 77 103 / 0 0 0 0 Hobart OK 73 98 75 102 / 10 0 0 0 Wichita Falls TX 73 98 75 101 / 0 0 0 0 Gage OK 72 98 74 102 / 10 0 0 0 Ponca City OK 76 98 78 102 / 0 0 0 0 Durant OK 78 99 78 101 / 0 0 0 0

OUN WATCHES/WARNINGS/ADVISORIES

OK...Heat Advisory from 1 PM to 8 PM CDT Monday for OKZ006>008-013- 020-026-030>032-043-048-052.

Heat Advisory until 8 PM CDT this evening for OKZ032-043-045-048- 050>052.

TX...None.