Heat index values reached up to 106 degrees during the afternoon hours in far northwest Alabama.
Every event with a place to put it; 2 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 HUN wrote it up.
Heat index values reached up to 106 degrees during the afternoon hours in far northwest Alabama.
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 Huntsville, AL wrote its last area forecast discussion before the first event at Jun 29, 11:35 AM CST, 1 hour 25 minutes earlier.
Area Forecast Discussion
National Weather Service Huntsville AL
1235 PM CDT Thu Jun 29 2023
...New NEAR TERM, SHORT TERM, LONG TERM...
.NEAR TERM...
(Tonight)
Issued at 1235 PM CDT Thu Jun 29 2023
MCS moving south into middle TN will likely either have moved
through our forecast area or will have dissipated by 00Z. There
seems to be a slight weakening trend at the moment as the MCS
remains just east of the extremely unstable airmass in western TN
and northern MS. However, this is still uncertain at this time and
will continue to watch convective trends. PoP adjustments may be
needed pending developments this afternoon. Overall though, most
guidance suggests most of our central and western counties stay
dry overnight. However, will maintain a low PoP in our eastern
counties as the southern extent of the MCS moving through the
eastern corn belt shifts southeast into the central Appalachians.
&&
.SHORT TERM...
(Friday through Sunday)
Issued at 1235 PM CDT Thu Jun 29 2023
Upper ridging will build a bit further northeast on Friday, with
100+ temps likely in a few spots both days. A few locations may
reach 100 degree air temps, with heat index values of 105-110 in
our western counties and 100-105 in our eastern counties. An MCS
may try to sneak into our eastern counties Friday night as well
as the ridge starts to break down. This happens more earnestly on
Saturday night into Sunday. Steep low level lapse rates and high
CAPE values on Saturday into Sunday should support scattered
thunderstorms, some with strong to severe microbursts possible
both days. Temperatures will be held in the 90s on Sunday due to
more extensive clouds and thunderstorms.
&&
.LONG TERM...
(Sunday night through Thursday)
Issued at 1235 PM CDT Thu Jun 29 2023
An upper trough currently over the Rockies will emerge into the
upper Midwest Sunday night into Monday. This will produce west-
southwest flow in low levels and creating more favorable shear
profiles for organized and sustained thunderstorms, some strong to
severe once again. An associated cold front will sag into the
area, and may linger through midweek, keeping scattered to
numerous showers and thunderstorms in the area at times. Locally
heavy rainfall may become more problematic for areas that
experience repeating episodes of thunderstorms. The good news is
that temperatures will be much closer to if not slightly below
normal for early July next week with highs in the upper 80s to
lower 90s.
&&
.AVIATION...
(18Z TAFS)
Issued at 1112 AM CDT Thu Jun 29 2023
Complex of +TSRA moving south into middle TN may reach southern
middle TN by 19-21Z and if they hold together, into north AL from
20-22Z. However, there is some uncertainty on this at this time.
Amendments may be needed to add TSRA and vsby/cig restrictions to
KHSV and KMSL as this evolves. Otherwise, VFR conditions are
forecast during the remainder of the period.
&&
.HUN WATCHES/WARNINGS/ADVISORIES...
AL...Excessive Heat Warning until 8 PM CDT Friday for ALZ001>003.
Heat Advisory until 11 AM CDT Friday for ALZ004>007-016.
Excessive Heat Warning from 11 AM to 8 PM CDT Friday for
ALZ004>007-016.
Heat Advisory from 11 AM to 8 PM CDT Friday for ALZ008>010.
TN...Heat Advisory until 11 AM CDT Friday for TNZ076-096.
Excessive Heat Warning from 11 AM to 8 PM CDT Friday for TNZ076-
096.
Heat Advisory from 11 AM to 8 PM CDT Friday for TNZ097.
&&
NEAR TERM...17
SHORT TERM....17
LONG TERM....17
AVIATION...17The national radar mosaic for the moment the first event began.
2 heat. Local standard time, as filed.
The heat index reached up to 106 degrees in far northwest Alabama during the afternoon hours.
The heat index reached up to 106 degrees in far northwest Alabama during the afternoon hours.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Alabama in 2023Every state in 2023This day in weather historyWarnings in Alabama, 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: 1115453, 1115454.