An upper level low moved from the Four Corners region to the southern Plains and brought a cold front through South Central Texas. Thunderstorms developed along the front and some of these storms produced large hail and damaging wind gusts.
Every event with a place to put it. 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 EWX wrote it up.
An upper level low moved from the Four Corners region to the southern Plains and brought a cold front through South Central Texas. Thunderstorms developed along the front and some of these storms produced large hail and damaging wind gusts.
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 Austin/San Antonio, TX wrote its last area forecast discussion before the first event at Mar 22, 5:11 PM CST, 3 hours 8 minutes earlier.
Area Forecast Discussion National Weather Service Austin/San Antonio TX 611 PM CDT Mon Mar 22 2021 .UPDATE... Scattered strong to severe storms remain just northwest of our CWA, but latest hi-res model guidance shows some development to the south across our northern CWA. Some of this activity could be severe with modest instability and shear and a Severe Thunderstorm Watch has been issued for areas north of a Gillespie to Travis line. Can't rule out something a bit farther south of that as well. Hail and wind will be the main hazards but hodographs from VWPs do show some decent low-level profiles for rotation and this will have to be watched as well. && .AVIATION... Convection remains northwest of AUS at the present time with some scattered light rain just east of DRT. Should see the scattered rain showers impact the I35 sites later this evening with AUS the most likely to see some thunderstorms with the activity as well. In addition to the rain chances, MVFR ceilings are expected this evening until drier air moves in behind the storm system late tonight. Winds will be breezy from the southeast this evening and then switch to the southwest/west behind the boundary late tonight. && .PREV DISCUSSION... /ISSUED 241 PM CDT Mon Mar 22 2021/ SHORT TERM (Today through Tuesday)... An upper level low is moving into West Texas this afternoon. A surface cold front is stretched from the Texas Panhandle to north central Mexico. Ahead of the front winds are from the southeast across our CWA. Dewpoint temperatures across our CWA are in the 50s with temperatures in the 60s and 70s. As the upper low and frontal boundary progress to the east tonight, they will bring a chance for showers and thunderstorms to South Central Texas. The big question is how strong will storms be. The morning sounding from DRT showed a strong cap with the temperature around 16 degrees C near 800 mb. At FWD the cap was much weaker. So, it looks like there will be better chances for severe thunderstorms farther north. How far south will the severe come? Model soundings are split on whether the cap will erode over any part of the our CWA. SPC has extended the Marginal risk to a line from northeastern Val Verde to Bandera to northern Lee. This includes the Austin metro area. Storm strength will all depend on if there is enough cooling at the top of the boundary layer, and without any model consensus, it's too hard to tell. If storms can develop there are steep lapse rates aloft and large hail and damaging wind gusts are the most likely threats. The best timing for strong storms is late this evening into the early overnight period. All the convection should push off to the east by around sunrise Tuesday. Dry weather will return for Tuesday and Tuesday night. Drier air will move in behind the cold front. Skies will clear and the sunshine will allow temperatures to climb into the 80s across most of the area Tuesday afternoon. Winds will turn around to the south Tuesday night, but skies will stay mostly clear and temperatures will cool to near normal for Wednesday morning. LONG TERM (Tuesday Night through Sunday)... With southerly flow back in place to start the long term period it will set the stage for an active Wednesday and Thursday, before the weather takes a breather headed into the weekend. Models are showing a much deeper trough digging across northern Mexico and moving towards the Big Bend Region of Texas by Wednesday morning. Wednesday morning could see a mix of light rain and perhaps a rumble of thunder east of Interstate 35 in the warm sector where a warm front will extend from the Surface Low across the Rio Grande Plains. The West Texas Dryline will push eastward into the Rio Grande Plains during the afternoon hours allowing for temperatures to soar into the mid to upper 80s. Rain chances linger in that warm sector to the east through the early afternoon hours, but by late afternoon into the evening hours there should be a lull in precipitation across the area. As the upper trough across West Texas arrives it will be accompanied by a Pacific Front pushed through by the larger trough moving through the Central Plains. At the same time the surface low will move along the Texas Coast. This will produce decent chances of rain area wide for Wednesday night into Thursday morning. Models have slowed the frontal passage slightly with most now showing it moving through the I-35 corridor around daybreak on Thursday. The 12z NAM is now the driest of the models keeping any precipitation confined mostly to the Coastal Plains. The GFS has come more in line with the ECMWF and Canadian showing decent QPF across the Edwards Plateau and Hill Country with the frontal passage on Thursday morning. Model soundings show plenty of shear, but are fairly limited when it comes to instability so, combined with the not ideal timing of the FROPA being very early Thursday morning chances for strong storms look lower. That said, with the disagreement still present in some of the models will need to watch this trend over the next 48 hours. Rain chances linger into mid-day Thursday before the system pushes east and clearing begins by late in the day. Highs Thursday will be cooler behind the system with breezy winds. Friday and Saturday will see sunny skies with a warming trend. The next system looks to arrive Sunday morning. Models keep most of the QPF down along the Texas Coast with the NBM currently not showing any PoPs across our area. && .PRELIMINARY POINT TEMPS/POPS... Austin Camp Mabry 55 81 54 78 55 / 50 0 0 40 50 Austin Bergstrom Intl Airport 55 82 53 79 55 / 50 0 0 40 50 New Braunfels Muni Airport 55 85 54 82 57 / 50 0 0 30 40 Burnet Muni Airport 47 78 52 77 50 / 70 0 0 40 50 Del Rio Intl Airport 48 86 54 85 54 / 0 0 0 0 30 Georgetown Muni Airport 52 79 52 77 53 / 70 0 0 40 50 Hondo Muni Airport 48 85 53 84 55 / 30 0 0 10 40 San Marcos Muni Airport 54 83 52 79 56 / 50 0 0 40 50 La Grange - Fayette Regional 59 83 57 80 60 / 50 0 0 50 40 San Antonio Intl Airport 54 83 56 80 57 / 40 0 0 30 40 Stinson Muni Airport 54 84 55 81 58 / 40 0 0 20 40 && .EWX WATCHES/WARNINGS/ADVISORIES... None. && Short-Term/Aviation...Hampshire Long-Term...EWilliams
Hazardous Weather Outlook National Weather Service Austin/San Antonio TX 358 AM CDT Mon Mar 22 2021 TXZ171>173-183>194-202>209-217>225-228-230900- Llano-Burnet-Williamson-Val Verde-Edwards-Real-Kerr-Bandera- Gillespie-Kendall-Blanco-Hays-Travis-Bastrop-Lee-Kinney-Uvalde- Medina-Bexar-Comal-Guadalupe-Caldwell-Fayette-Maverick-Zavala- Frio-Atascosa-Wilson-Karnes-Gonzales-De Witt-Lavaca-Dimmit- 358 AM CDT Mon Mar 22 2021 This Hazardous Weather Outlook is for South-Central Texas.. .DAY ONE...Today And Tonight. A strong storm or two will be possible this evening across the area as a weak cold front moves into the region. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated.
Special Weather Statement
National Weather Service Austin/San Antonio TX
902 PM CDT Mon Mar 22 2021
TXZ171-172-188-190-230245-
Blanco TX-Gillespie TX-Llano TX-Burnet TX-
902 PM CDT Mon Mar 22 2021
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN BLANCO...
GILLESPIE...LLANO AND SOUTHWESTERN BURNET COUNTIES UNTIL 945 PM
CDT...
At 902 PM CDT, Doppler radar was tracking a strong thunderstorm near
Doss, or 17 miles south of Mason, moving east at 65 mph.
Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.
Locations impacted include...
Fredericksburg, Burnet, Marble Falls, Kingsland, Llano, Round
Mountain, Buchanan Dam, Gainesville, Granite Shoals, Horseshoe Bay,
Johnson City, Meadowlakes, Stonewall, Highland Haven, Castell, Inks
Lake State Park, Blowout, Rocky Creek, Hye and Crabapple.
A Severe Thunderstorm Watch remains in effect until midnight CDT for
south central Texas.
LAT...LON 3077 9810 3022 9837 3026 9930 3046 9930
3050 9925 3050 9897 3070 9896 3075 9890
3074 9866 3076 9856
TIME...MOT...LOC 0202Z 262DEG 57KT 3050 9914
EWThe Ft Hood radar (KGRK), 96 km away, was scanning. The volume nearest the first event began at 02:17 UTC.
25 hail, 2 thunderstorm wind, 1 tornado. Local standard time, as filed.
A thunderstorm produced hail from quarter to golf ball size. Hailed covered parts of FM 690, CR 108, and CR 110.
A thunderstorm produced hail that was measured at 2.0 to 2.5 inches on the east side of Lake Buchanan.
A thunderstorm produced ping pong ball to golf ball size hail on the east shore of Lake Buchanan.
A thunderstorm produced three inch size hail that dented cars north of Burnet.
A thunderstorm produced three inch diameter hail along CR 108 just north of Burnet.
A thunderstorm produced ping pong ball size hail north of Burnet.
A National Weather Service damage survey of the Bertram area found wind damage was caused by strong microburst winds. In particular, building damage in Bertram occurred along Hwy 29 between FM 243 and North East St. There was roof damage at several businesses as well as roof and wall failures of 2 buildings near the Highway 29|and North Grange St. intersection. Debris was blown generally west to east with |estimated winds at 75 mph. The damage was highly concentrated in this area of Bertram with no direct evidence of a tornado. Flying debris caused additional damage including broken windows at the Bertram library. As the severe thunderstorm moved|east along Highway 29, additional roof damage was observed near Reed Circle.
A thunderstorm produced golf ball size hail that broke through a skylight on a house in Bertram.
A thunderstorm produced wind gusts estimated at 60 mph that knocked down approximately 200 feet of fence in Andice.
A thunderstorm produced quarter size hail in Walburg.
A thunderstorm produced quarter size hail north of Kerrville.
A thunderstorm produced two inch diameter hail just north of Leakey.
A thunderstorm produced 0.5 inch to one inch hail northeast of Leakey.
A thunderstorm produced golf ball size on the north side of Spring Branch.
A thunderstorm produced quarter size hail in Boerne.
An NWS survey on the west side of Canyon Lake found sporadic tree damage, along with two power poles snapped and approximately 1/4 of a single family home torn off. The damage area was near Canyon Lake Boat Ramp #6 on the south central side of the|lake along and near Canyon Lake Drive and Rimrock Pass. The damage was rated EF-1 and winds were estimated at 100 mph.
A thunderstorm produced quarter to golf ball size hail around Canyon Lake.
A thunderstorm produced quarter size hail in Boerne.
A thunderstorm produced two inch diameter hail northeast of New Braunfels.
A thunderstorm produced golf ball size hail northeast of New Braunfels.
A thunderstorm produced quarter size hail near Texas State University in San Marcos.
A thunderstorm produced quarter size hail on the west side of San Antonio.
A thunderstorm produced nickel to ping pong ball size hail in Martindale. The report was from a former NWS employee.
A thunderstorm produced ping pong ball size hail near Fentress.
A thunderstorm produced quarter size hail near Moulton.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2021Every state in 2021This day in weather historyThe tornado archive for Texas, 2021Warnings in Texas, March 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: 949449, 949450, 949451, 949452, 949453, 949454, 949455, 949456, 949457, 949475, 949458, 949459, 949460, 949461, 949462, 949463, 949476, 949464, 949465, 949466, 949467, 949468, 949469, 949470, 949471, 949472, 949473, 949474.