A strong Pacific cold front moved into a warm, moist airmass and generated thunderstorms in the warm sector. 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.
A strong Pacific cold front moved into a warm, moist airmass and generated thunderstorms in the warm sector. 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 Jan 10, 3:34 PM CST, 1 hour 16 minutes earlier.
Area Forecast Discussion National Weather Service Austin/San Antonio TX 334 PM CST Fri Jan 10 2020 .UPDATE... SPC has issued a Severe Thunderstorm Watch for the area along and east of a line from Llano to Kerrville to Pearsall until 10 pm. && .PREV DISCUSSION... /ISSUED 247 PM CST Fri Jan 10 2020/ SHORT TERM (Tonight through Saturday Night)... Upper air analysis this morning showed a deep trough from the Four Corners to the Baja Peninsula. The flow over Texas was from the southwest. At the surface, a cold front was stretched over West Texas from the Panhandle to the Big Bend. Our CWA is in the warm sector ahead of the front and winds are from the southeast. Temperatures across the area ranged from the lower 70s to the lower 80s and dewpoints were generally in the 60s. This warm, moist environment is ripe for convective development. However, the morning sounding from DRT had a strong cap at the top of the boundary layer. The has been eroding to our north and northwest and we expect this continue as the front moves to the east. Forecast soundings show 1500-2000 j/kg of CAPE, 55-60 kts of 0-6 km wind shear, and mid- level lapse rates around 8 C/km. We expect to see thunderstorms develop later this afternoon and continue through the evening. With the conditions mentioned above, some storms could be strong to severe. The most likely threats will be strong wind gusts up to 70 mph and large hail up to two inches. We expect storms to move into our north east area by late afternoon and progress to the southeast reaching I-35 by around 6 pm and be out of our CWA by around midnight. Behind the front winds will become westerly to northwesterly bringing drier, cooler air. Low temperatures Saturday will be 15 to 25 degrees cooler than Friday morning. Winds Saturday will be breezy front the northwest. High temperatures will be near 20 degrees cooler than Friday. Saturday night the surface high will move across North Texas and turn the low level flow around to the southeast. Winds will be light and skies will be clear leading to good radiational cooling and another drop in temperatures of about 10 degrees. LONG TERM (Sunday through Friday)... With longwave troughing across the western United States during the long term forecast, a series of northern Pacific shortwave troughs rounding the base of the larger trough will eject into the Southern Plains every 1-2 days next week. This will allow for a few cold fronts to make runs towards the region. These disturbances look to remain too far north to allow for any significant frontal intrusion through mid-week, but should allow for a frontal boundary to reach the region by Thursday. As a result, dry conditions areawide Sunday will transition to some low daily rain chances east of Interstate 35 Monday through Wednesday as modified Gulf air moves back into the region. This will also allow for temperatures to moderate from the 60s to low 70s on Sunday into the mid 70s to low 80s by Wednesday. Rain chances Thursday will linger in the vicinity of the remnant frontal boundary, which lift north of the region Friday. Expect highs in the mid 50s to mid 60s behind the front Thursday with highs in the mid 60s to low 70s by Friday. && .PRELIMINARY POINT TEMPS/POPS... Austin Camp Mabry 44 55 35 63 47 / 80 0 0 0 0 Austin Bergstrom Intl Airport 45 55 32 63 43 / 100 0 0 0 0 New Braunfels Muni Airport 48 57 34 65 46 / 100 0 0 0 0 Burnet Muni Airport 40 53 33 63 44 / 50 0 0 0 0 Del Rio Intl Airport 47 61 39 68 47 / - 0 0 0 0 Georgetown Muni Airport 42 54 33 62 44 / 70 0 0 0 0 Hondo Muni Airport 45 63 34 68 44 / 20 0 0 0 0 San Marcos Muni Airport 46 57 32 64 44 / 100 0 0 0 0 La Grange - Fayette Regional 48 54 33 64 47 / 100 0 0 0 - San Antonio Intl Airport 48 60 38 65 48 / 60 0 0 0 0 Stinson Muni Airport 48 61 38 66 49 / 70 0 0 0 0 && .EWX WATCHES/WARNINGS/ADVISORIES... None. && Short-Term/Aviation...05 Long-Term...Oaks Decision Support...YB
Hazardous Weather Outlook National Weather Service Austin/San Antonio TX 357 PM CST Fri Jan 10 2020 TXZ171>173-183>194-202>209-217>225-228-112200- 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- 357 PM CST Fri Jan 10 2020 This Hazardous Weather Outlook is for South-Central Texas.. .DAY ONE...This Afternoon And Tonight. Strong to severe storms will be possible this afternoon and tonight for areas generally along and east of a Rocksprings to Carrizo Springs line. The most favored areas for severe storms will be east of a Llano to San Antonio to Pearsall line. The main threat will be damaging wind gusts up to 70 mph and hail up to two inches, however, isolated tornadoes are also possible. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Elevated fire weather conditions are possible Saturday afternoon across the western Edwards Plateau and Rio Grande Plains. .SPOTTER INFORMATION STATEMENT... Spotter activation is possible this afternoon and evening east of a Rocksprings to Carrizo Springs line.
Special Weather Statement
National Weather Service Austin/San Antonio TX
337 PM CST Fri Jan 10 2020
TXZ171-186-188-189-102215-
Gillespie TX-Kerr TX-Llano TX-Kendall TX-
337 PM CST Fri Jan 10 2020
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL KERR...GILLESPIE...LLANO
AND NORTHWESTERN KENDALL COUNTIES UNTIL 415 PM CST...
At 337 PM CST, Doppler radar was tracking strong thunderstorms along
a line extending from Loyal Valley to near Hunt. Movement was
northeast at 40 mph.
Half inch hail and wind gusts up to 50 mph will be possible with
these storms.
Locations impacted include...
Kerrville, Fredericksburg, Llano, Ingram, Hunt, Castell, Field Creek,
Kerrville-Schreiner Park, Tivydale, Rocky Hill, Waltonia, Baby Head,
Crabapple, Grapetown, Oxford, Cherry Spring, Enchanted Rock State
Natural Area, Cain City, Old Tunnel State Park and Doss.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
A Severe Thunderstorm Watch remains in effect until 1000 PM CST for
south central Texas.
LAT...LON 3004 9884 2991 9952 2992 9952 3029 9943
3029 9930 3050 9931 3050 9896 3092 9896
3092 9855
TIME...MOT...LOC 2137Z 220DEG 35KT 3060 9901 3012 9933
HAMPSHIREThe Austin/San Antonio radar (KEWX), 123 km away, was scanning. The volume nearest the first event began at 22:50 UTC.
19 thunderstorm wind, 13 hail. Local standard time, as filed.
A thunderstorm produced half dollar size hail south of Llano. The report was received on Facebook.
A thunderstorm produced quarter size hail near Buchanan Dam.
A thunderstorm produced penny size hail southwest of Bandera.
A thunderstorm produced nickel size hail in Lakehills.
A thunderstorm produced half dollar size hail northwest of Devine.
A thunderstorm produced quarter size hail in Blanco.
A thunderstorm produced pea to nickel size hail north of Liberty Hill.
A thunderstorm produced wind gusts estimated at 70 mph that caused considerable roof and awning damage to a house.
A thunderstorm produced quarter size hail north of Blanco. This report was from MPING.
A thunderstorm produced nickel size hail in Helotes.
A thunderstorm produced a measured wind gust of 57 kts. at Kelly Field in San Antonio.
A thunderstorm produced wind gusts estimated at 75 mph that caused damage to the roof of the Toyota plant in southern San Antonio.
A thunderstorm produced wind gusts estimated at 75 mph that blew down carports and a gas station sign in southwestern San Antonio.
A thunderstorm produced penny size hail northwest of Dripping Springs.
A thunderstorm produced a measured wind gust of 67 kts. at Stinson Municipal Airport in San Antonio.
A thunderstorm produced one inch hail on the far northside of San Antonio.
A thunderstorm produced a measured wind gust of 51 kts. at Randolph AFB in Universal City.
A thunderstorm produced wind gusts estimated at 70 mph that damaged fences and carports near Samuel Clemens High School in Schertz.
A thunderstorm produced wind gusts estimated at 75 mph that caused the collapse of an awning at a business in southeastern San Antonio.
A thunderstorm produced penny size hail in Georgetown.
A thunderstorm produced wind gusts estimated at 75 mph that damaged four houses in La Vernia. The damage included a tipped over carport, broken fences, and roof damage.
A thunderstorm produced wind gusts estimated at 80 mph that blew the roof off a barn at Gin Spur Rd. and Gin Rd. near New Berlin.
A thunderstorm produced a measured wind gust of 53 kts. at the San Marcos Municipal Airport.
A thunderstorm produced wind gusts estimated at 75 mph that blew the siding off a house and flipped over a storage pod in Kyle. There were multiple trees and fences blown down near this neighborhood as well as areas just to the west on the west side of Interstate 35. Multiple houses had shingle damage.
A thunderstorm produced wind gusts estimated at 70 mph that blew over two 18-wheeler trucks on SH-130 north of Lockhart.
A thunderstorm produced nickel size hail in Austin.
A thunderstorm produced wind gusts estimated at 75 mph that destroyed a fence, downed trees, tore the roof off a barn, tore part of a roof off a house, and damaged a garage in Dale.
A thunderstorm produced wind gusts estimated at 75 mph that damaged numerous power poles and blew down power lines near the intersection of Hwy 71 and FM 153 at Buescher State Park near Smithville.
A thunderstorm produced wind gusts estimated at 80 mph that blew over a small metal tower and uprooted a large tree near the entrance of Buescher State Park near Smithville.
A thunderstorm produced wind gusts estimated at 75 mph that blew over an 18-wheeler truck on Hwy 77 near Warda.
A thunderstorm produced a measured wind gust of 52 kts. at the Giddings-Lee County Airport.
A thunderstorm produced wind gusts estimated at 85 mph that caused considerable damage in Warrenton. Several metal siding buildings were destroyed near FM 954 and Hwy 237 and numerous trees were uprooted and snapped near Bauer Rd.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2020Every state in 2020This day in weather historyWarnings in Texas, January 2020
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: 865692, 865693, 865694, 865695, 865696, 865698, 865702, 869342, 865709, 865710, 869130, 869343, 869344, 865712, 869131, 865735, 869132, 869345, 869346, 865736, 869347, 869348, 869133, 869349, 869351, 865737, 869352, 869353, 869354, 869356, 869134, 869359.