Heat Advisories were expanded to the remainder of North and Central Texas as the June heat continued to intensify. Heat index values met or exceeded 105 degrees most afternoons, with ambient temperatures reaching 102 or greater across a few locations on some afternoons.
Every event with a place to put it; 15 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS FWD wrote it up.
Heat Advisories were expanded to the remainder of North and Central Texas as the June heat continued to intensify. Heat index values met or exceeded 105 degrees most afternoons, with ambient temperatures reaching 102 or greater across a few locations on some afternoons.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Fort Worth, TX wrote its last area forecast discussion before the first event at Jun 20, 5:49 PM CST, 1 hour 11 minutes earlier.
Area Forecast Discussion National Weather Service Fort Worth TX 649 PM CDT Tue Jun 20 2023 ...New Short Term, Aviation... .SHORT TERM... /NEW/ /Through Wednesday Evening/ A mid level ridge centered over Mexico will maintain the seemingly endless pattern of northwest flow aloft with hot and humid conditions at the surface. Abundant moisture at the lower levels as noted by the 70s dewpoints will keep maximum heat indices well into Excessive Heat criteria through Wednesday. Heat index values will exceed 110 pretty much areawide during the Wednesday afternoon hours, similar to today. There is some hope for relief, however, as this pattern is susceptible to driving afternoon thunderstorms which develop in the Plains southward into North Texas during the overnight hours. These storms typically grow upscale into an MCS, which can bring some cooling rainfall to parts of the region each day. There is a low-end potential that one of these storm complexes may make a run at the Red River tonight, as indicated by recent runs of some of the convection- allowing models. If this does occur, it looks like these storms would be weakening as they arrive, be confined mainly to the north or northeast portions of the forecast area, and would most likely dissipate to our north. Better chances of thunderstorms are expected during the afternoon and evening hours on Wednesday, as the next shortwave rounds the northeast flank of the Mexico ridge. There should be at least one surface focus for development in the form of a dryline, which will likely be situated over the Big Country by Wednesday afternoon. Thunderstorms are expected to develop along the dryline 3-5 PM and enter our western zones 6-7 PM. With a highly unstable airmass and 50kt of deep layer shear present, storms should become strong to severe fairly quickly with large hail and damaging winds both possible. These storms will be mostly confined to the western half of the region and dissipate while entering the I-35 corridor. It is possible that there will be an additional surface focus if the dying MCS produces a remnant outflow boundary. If this happens, the afternoon convection will be able to develop farther east and affect locations along and just east the I-35 corridor before dissipating Wednesday night. Will thus keep slight chance POPs as far east as a Gainesville-Palestine line, with the better POPs staying off to the west. 30 && .LONG TERM... /Issued 218 PM CDT Tue Jun 20 2023/ /Thursday and Beyond/ Showers and thunderstorms associated with an exiting MCS may linger across portions of Central Texas and the Brazos Valley through Thursday morning. Additional isolated showers and thunderstorms will be possible across a similar area Thursday afternoon/evening as the atmosphere destabilizes, especially in the presence of any lingering outflow boundaries. An environment marked by ~2000-2500 J/kg MLCAPE and 30-40 kts of deep-layer shear may support a couple strong to severe thunderstorms. Another shortwave progressing through the northwest flow aloft may support the development of scattered thunderstorms along a dryline extending across portions of eastern New Mexico and the Texas Panhandle late Thursday afternoon. Like the night before, this activity is expected to grow upscale into a complex of thunderstorms as it shifts east-southeastward into portions of North and Central Texas. Confidence is still on the lower end regarding the placement of this overnight system, therefore PoPs were kept to 20-25% through Thursday night and into Friday morning. Dangerous heat will remain a concern through the long-term period. Low pressure spinning over the Southeast CONUS will allow for east-northeasterly surface flow to bring some drier air to the region, knocking heat indices below Excessive Heat Warning criteria across much of North and Central Texas Thursday and Friday afternoons. It will still be quite hot, however, with temperatures in the low to mid 90s and heat indices in the 100-108 range expected across most of the forecast area. Additional heat headlines will be considered in future forecast packages. By late Friday, the upper-level ridge looks to make a strong return bringing extreme heat back to the region through the weekend and into next week. South-southeasterly surface flow will usher in low to mid 70s dewpoints into North and Central Texas aiding in apparent temperatures approaching Excessive Heat Warning criteria once again, especially Saturday. Daytime mixing may become more efficient into early next week, keeping humidity a bit lower and helping the ambient temperature not feel quite as miserable. However, it will still be hot and you should continue to take the proper precautionary measures to avoid heat-related illnesses! Langfeld && .AVIATION... /NEW/ /00Z TAFs/ Similar to today, hot and humid conditions will produce density altitudes of 3500+ feet during the afternoon hours again on Wednesday. Thunderstorms will become possible Wednesday evening as an upper level disturbance moves overhead. Storms should initialize to the west and may try to weaken before reaching area TAF sites, but probabilities are high enough to include VCTS after 22/00Z. Otherwise conditions should remain VFR, though a thin layer of haze may have some minor effects on slant-range visibilities. 30 && .PRELIMINARY POINT TEMPS/POPS... Dallas-Ft. Worth 80 99 77 93 76 / 5 10 30 10 20 Waco 78 98 77 94 76 / 0 5 40 20 20 Paris 74 92 71 87 71 / 0 10 5 10 10 Denton 77 99 73 94 72 / 5 10 20 10 20 McKinney 76 96 73 90 72 / 5 10 20 10 20 Dallas 80 99 77 94 76 / 5 10 30 10 20 Terrell 77 96 73 92 73 / 5 10 20 10 20 Corsicana 80 98 77 93 76 / 5 10 30 20 20 Temple 78 99 76 96 76 / 0 5 40 20 20 Mineral Wells 78 99 75 93 73 / 5 10 40 10 20 && .FWD WATCHES/WARNINGS/ADVISORIES... Excessive Heat Warning until 8 PM CDT this evening for TXZ091>095-105>107-123. Heat Advisory until 8 PM CDT Wednesday for TXZ091>094-105-123. Excessive Heat Warning until 8 PM CDT Wednesday for TXZ100>104- 115>122-129>135-141>148-156>162-174-175. &&
Hazardous Weather Outlook National Weather Service Fort Worth TX 702 PM CDT Tue Jun 20 2023 TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-212330- Montague-Cooke-Grayson-Fannin-Lamar-Young-Jack-Wise-Denton-Collin- Hunt-Delta-Hopkins-Stephens-Palo Pinto-Parker-Tarrant-Dallas- Rockwall-Kaufman-Van Zandt-Rains-Eastland-Erath-Hood-Somervell- Johnson-Ellis-Henderson-Comanche-Mills-Hamilton-Bosque-Hill-Navarro- Freestone-Anderson-Lampasas-Coryell-Bell-McLennan-Falls-Limestone- Leon-Milam-Robertson- 702 PM CDT Tue Jun 20 2023 This Hazardous Weather Outlook is for North and Central Texas. .DAY ONE...Tonight. Oppressive heat and humidity will increase the threat for heat- related illnesses through this evening if precautions are not taken. Make sure to drink plenty of water, wear light-colored clothing, and take frequent breaks if spending time outdoors. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Oppressive heat and humidity will continue through at least Wednesday. Thunderstorm chances increase late Wednesday through late Friday with a couple overnight thunderstorm complexes possible. A few thunderstorms may become strong to severe and contain damaging wind gusts, frequent lightning, and hail. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The national radar mosaic for the moment the first event began.
15 heat. Local standard time, as filed.
Heat indices met or exceeded 105 and/or ambient temperatures met or exceeded 103 on most afternoons from June 20 through June 29 across Cooke County.
Heat indices met or exceeded 105 on most afternoons from June 20 through June 29 across Grayson County.
Heat indices met or exceeded 105 on most afternoons from June 20 through June 29 across Fannin County.
Heat indices met or exceeded 105 on most afternoons from June 20 through June 29 across Montague County.
Heat indices met or exceeded 105 and/or ambient temperatures met or exceeded 103 on most afternoons from June 22 through June 29 across Eastland County.
Heat indices met or exceeded 105 and/or ambient temperatures met or exceeded 103 on most afternoons from June 22 through June 29 across Erath County.
Heat indices met or exceeded 105 and/or ambient temperatures met or exceeded 103 on most afternoons from June 22 through June 29 across Comanche County.
Heat indices met or exceeded 105 and/or ambient temperatures met or exceeded 103 on most afternoons from June 23 through June 29 across Young County.
Heat indices met or exceeded 105 and/or ambient temperatures met or exceeded 103 on most afternoons from June 23 through June 29 across Jack County.
Heat indices met or exceeded 105 and/or ambient temperatures met or exceeded 103 on most afternoons from June 23 through June 29 across Stephens County.
Heat indices met or exceeded 105 and/or ambient temperatures met or exceeded 103 on most afternoons from June 23 through June 29 across Palo Pinto County.
Heat indices met or exceeded 105 on most afternoons from June 24 through June 29 across Lamar County.
Heat indices met or exceeded 105 and/or ambient temperatures met or exceeded 103 on most afternoons from June 24 through June 29 across Wise County.
Heat indices met or exceeded 105 and/or ambient temperatures met or exceeded 103 on most afternoons from June 24 through June 29 across Denton County. Denton County Public Health reported an increase in heat-related illnesses during this period including heat stroke, heat exhaustion, heat cramps, or other heat-related illnesses.
Heat indices met or exceeded 105 and/or ambient temperatures met or exceeded 103 on most afternoons from June 24 through June 29 across Parker County.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2023Every state in 2023This day in weather historyWarnings in Texas, June 2023
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1111454, 1111463, 1111464, 1111466, 1111480, 1111481, 1111482, 1111473, 1111475, 1111477, 1111478, 1111467, 1111469, 1111470, 1111471.