A slow moving cold front interacted with a very warm and moist airmass across the region and produced very heavy rainfall mainly along and north of I20. About 2 to 4 inches fell mainly along and north of a line from Sterling City to Brownwood and flooded several roads across the region.
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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 SJT wrote it up.
A slow moving cold front interacted with a very warm and moist airmass across the region and produced very heavy rainfall mainly along and north of I20. About 2 to 4 inches fell mainly along and north of a line from Sterling City to Brownwood and flooded several roads across the region.
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 San Angelo, TX wrote its last area forecast discussion before the first event at May 31, 5:32 AM CST, 4 hours 58 minutes earlier.
Area Forecast Discussion National Weather Service San Angelo TX 632 AM CDT Mon May 31 2021 ...New AVIATION... .SHORT TERM... (Today and tonight) Issued at 208 AM CDT Mon May 31 2021 A line of thunderstorms located just off to the west and northwest of the Big Country at 2 AM CDT will continue moving in over the next couple of hours. In fact, periods of heavy rain are certainly a concern as this line moves into the Big Country. Additional rounds of thunderstorm activity may cause lingering issues with flooding across areas included in the Flood Watch through tomorrow morning. As a result, the Flood Watch has been extended into Tuesday morning. As we watch this activity move through the area, we may see an isolated severe thunderstorm as well. The main hazards with these will be damaging winds and to a lesser degree large hail. In fact, this could affect areas to the south of the Flood Watch as it expands and develop further south this afternoon and evening. This would included the Concho Valley, Heartland, and the Interstate 10 corridor. && .LONG TERM... (Tuesday through next Sunday) Issued at 115 AM CDT Mon May 31 2021 An active weather pattern will continue through the rest of the week, with a chance for showers and thunderstorms each day, mainly during the afternoon and evening. The main concern for these thunderstorms will be heavy rainfall, and the potential for flooding. During the day Tuesday, we may see a relative lull in thunderstorm activity after Monday night's storms move through the area. However, the activity from Monday night is expected to lay down a boundary somewhere in the area, and GFS/ECMWF both indicate that this boundary should be somewhere in the southern half of our CWA. With that in mind, showers and thunderstorms will be possible for mainly the southern half of the area Tuesday night into Wednesday. From Wednesday night into Thursday, the axis of the main trough moving through the central U. S. will move to the east. However, we will remain under weak upper level troughing. This weak troughing, along with ample moisture in the low levels will allow for scattered afternoon and evening thunderstorms each day into the weekend. Exact timing and placement of this activity will depend on boundaries left behind by the previous day's convection, so keeping a generic chance in for most of the area through Saturday will be needed, although chances will slowly decrease from the second half of the week through the weekend. && .AVIATION... (12Z TAFS) Issued at 625 AM CDT Mon May 31 2021 Isolated showers will remain an ongoing issue through much of the TAF period. However, the main line of thunderstorms will continue moving through the Big Country over the next few hours. For the KJCT, KSOA, and KBBD terminals, expect a later arrival time as another line of thunderstorms may develop later today. Otherwise, MVFR to IFR conditions will be present at times. Reduced visibility, gusty and erratic winds, and heavy rainfall are possible as this main line of thunderstorms moves through. && .PRELIMINARY POINT TEMPS/POPS... Abilene 78 64 76 61 / 80 80 30 40 San Angelo 80 65 79 62 / 50 70 30 60 Junction 83 67 82 64 / 30 50 60 60 Brownwood 80 66 79 62 / 50 70 50 50 Sweetwater 76 62 74 60 / 80 80 20 40 Ozona 78 66 78 64 / 30 60 50 60 && .SJT WATCHES/WARNINGS/ADVISORIES... Flood Watch through Tuesday morning for Callahan-Coke-Fisher- Haskell-Jones-Nolan-Shackelford-Sterling-Taylor-Throckmorton. && SHORT TERM...41 LONG TERM....20 AVIATION...41
Hazardous Weather Outlook National Weather Service San Angelo TX 639 AM CDT Mon May 31 2021 TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139- 140-154-155-168>170-011145- Fisher-Nolan-Sterling-Coke-Runnels-Irion-Tom Green-Concho- Crockett-Schleicher-Sutton-Haskell-Throckmorton-Jones-Shackelford- Taylor-Callahan-Coleman-Brown-McCulloch-San Saba-Menard-Kimble- Mason- 639 AM CDT Mon May 31 2021 This Hazardous Weather Outlook is for portions of west central Texas. .DAY ONE...Today and Tonight Another round of thunderstorms is possible later today. This may lead to localized flooding from heavy rain. In addition, an isolated strong to severe thunderstorm may produce damaging winds or large hail. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday The unsettled pattern continues through the end of the week with chances for rain and thunderstorms. This will continue the threat of localized flooding. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated at this time.
Special Weather Statement
National Weather Service San Angelo TX
545 AM CDT Mon May 31 2021
TXZ054-114-127-128-311130-
Shackelford TX-Callahan TX-Nolan TX-Taylor TX-
545 AM CDT Mon May 31 2021
...SIGNIFICANT WEATHER ADVISORY FOR CALLAHAN...NOLAN...SOUTHEASTERN
SHACKELFORD AND TAYLOR COUNTIES UNTIL 630 AM CDT...
At 544 AM CDT, Doppler radar was tracking a line of strong
thunderstorms extending from northeastern Shackelford County, to
northeastern Nolan County, moving east at 35 mph.
Half inch hail and wind gusts up to 50 mph will be possible with this
storm.
Locations impacted include...
Abilene, Clyde, Albany, Baird, Wylie, Nolan, Merkel, Tye, Tuscola,
Buffalo Gap, Trent, Moran, Putnam, Maryneal, Dudley, Ibex, Rowden,
Caps, Dyess Afb and Atwell.
LAT...LON 3252 9909 3251 9911 3222 9912 3210 10066
3227 10064 3232 10047 3251 10031 3253 10022
3252 9961 3264 9961 3274 9931 3295 9912
3295 9910
TIME...MOT...LOC 1044Z 270DEG 30KT 3263 9923
snThe Dyess AFB radar (KDYX), 111 km away, was scanning. The volume nearest the first event began at 16:29 UTC.
6 flood, 3 flash flood. Local standard time, as filed.
Fisher County Sheriff's Office reported flowing water over U.S. Highway 180 just west of Roby.
Fisher County Sheriff's Office reported water flowing over the road on State Highway 70 just north of the Fisher County Hospital.
Fisher County Sheriff's Office reported water flowing over the road on State Highway 70 about 6 miles north of Sweetwater.
There was at least a couple of inches of standing water on the road near the intersection of South Clack Street and Nonesuch Road.
Law enforcement officials reported multiple low water crossings with flowing water in Baird, and people were trapped in their vehicles.
Texas Department of Transportation reported water over the roadway on southbound U.S. Highway 180.
Texas Department of Transportation reported water over the roadway along many points on FM 1084 just outside of Albany.
FM 57 was closed due to flooding.
There was water in homes and street flooding was reported in Hamlin. Also FM 1661, FM 126 and FM 57 were closed in Jones County due to flooding.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2021Every state in 2021This day in weather historyWarnings in Texas, May 2021
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: 957282, 957283, 957284, 957286, 957290, 957291, 957305, 957285, 957308.