Alert archive / Texas / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 49, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 10, 1986, 8:35 AM CDT for Atascosa County, McMullen County, Texas. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- May 10, 1986, 8:35 AM CDT (13:35 UTC)
- Expired
- May 10, 1986, 9:30 AM CDT
- In force
- 55 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Atascosa County, TX, McMullen County, TX
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Victoria Regiona, TX (KVCT), launched 12:00Z, 1.6 hours before the alert went out and 163 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2085 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 590 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 6.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAT 101335 SVRSAT TXC013-311-101430- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SAN ANTONIO TX 835 AM CDT SAT MAY 10 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 930 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTH CENTRAL TEXAS...ATASCOSA AND MCMULLEN AT 830 AM CDT..A SEVERE THUNDERSTORM WAS INDICATED BY RADAR ON THE FRIO-LASALLE-ATASCOSA-MCMULLEN COUNTY LINE MOVING TOWARD THE EAST AT 30 MPH. FREQUENT LIGHTNING..STRONG DAMAGING WINDS AND LARGE HAIL WILL LIKELY OCCUR IN THIS STORM. IN ADDITION..LOCALLY HEAVY RAINFALL AND FLOODING OFTEN ACCOMPANY SEVERE THUNDERSTORMS. A FLASH FLOOD WATCH I;S IN EFFECT FOR THE HILL COUNTRY..EDWARDS PLATEAU AND ADJACENT AREAS OF SOUTH CENTRAL TEXAS TODAY..INCLUDING ATASCOSA AND MCMULLEN COUNTIES.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, May 10, 6:01 AM CDT, 2 hours 34 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 545 AM CDT SAT MAY 10 1986 ...DENSE FOG DEVELOPING AROUND THE CAPITAL AREA... YESTERDAYS AND LAST NIGHTS HEAVY RAINS LEFT A RIPE ENVIRONMENT FOR FOG THIS MORNING. MANY SPOTS COULD TEMPORAIRILY EXPERIENCE VISIBILITIES BELOW 1 MILE EARLY THIS MORNING. THE MAIN THREAT OR CONCERN IN TODAYS WEATHER IS NOT NECESSARILY THE FOG. WE HAD VERY HEAVY..FLASH FLOODING RAINS YESTERDAY OVER MANY PARTS OF TRAVIS AND SURROUNDING COUNTIES. THAT TOO LEAVES A DANGEROUS ENVIRONMENT FOR ADDITIONAL FLASH FLOODING..ESPECIALLY IF THE LIKELIHOOD FOR MORE HEAVY THUNDERSTORMS REMAINS FAIRLY HIGH..AND IT DOES TODAY. MANY PEOPLE WILL BE TRYING TO ENJOY OUTDOOR ACTIVITIES..AND THAT PUTS A GREAT MANY OF US IN DANGER OF BEING IN THE WRONG PLACE AT THE WRONG TIME. LAKES..RIVERS..CREEKS AND STREAMS COLLECT THE RUNOFF FROM HEAVY RAINS. BEING ON..NEAR..OR DRIVING BACK AND FORTH ACROSS THEM MIGHT BE HAZARDOUS TO YOUR HEALTH. WATCH THE WEATHER CLOSELY TODAY.
Special weather statement, May 10, 7:49 AM CDT, 46 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 755 AM CDT SAT MAY 10 1986 ...HEAVY THUNDERSTORMS NORTHWEST OF AUSTIN... JUST BEFORE 8AM..RADAR SHOWED A LINE OF SHOWERS AND A FEW HEAVY THUNDER STORMS FROM SOUTH OF WACO TO WEST OF GEORGETOWN AND LAKE TRAVIS AND ON INTO THE HILL COUNTRY WEST OF FREDERICKSBURG. THOSE SHOWERS AND THUNDER STORMS WERE MOVING TOWARDS THE EAST AND NORTHEAST AT 20 MPH. OTHER WIDESPREAD RAINS AND HEAVY THUNDERSTORMS CONTINUED FROM EAST TO SOUTH AND SOUTHWEST OF SAN ANTONIO. THEY WERE MOVING TOWARDS THE NORTH EAST AT 25 MPH. THE HIGHEST RAINFALL RATE..NEAR ONE INCH PER HOUR..WAS CENTERED OVER THE EXTREME NORTHWESTERN CORNER OF WILLIAMSON COUNTY.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 8:24 PM CDT | Flash Flood Warning | EWX | Burnet, Lampasas, Travis, Williamson | 3 hr |
| May 9, 8:24 PM CDT | Flash Flood Warning | EWX | Bastrop | 3 hr |
| May 10, 7:09 AM CDT | Flash Flood Warning | EWX | Bandera, Edwards, Kerr, Real | 4 hr |
| May 10, 7:09 AM CDT | Flash Flood Warning | EWX | Kendall | 4 hr |
| May 10, 7:31 AM CDT | Severe Thunderstorm Warning | EWX | Frio | 59 min |
| May 10, 10:00 AM CDT | Severe Thunderstorm Warning | EWX | Goliad | 60 min |
| May 10, 10:12 AM CDT | Severe Thunderstorm Warning | EWX | Victoria | 63 min |
| May 10, 11:16 AM CDT | Severe Thunderstorm Warning | EWX | Calhoun | 59 min |
| May 10, 11:32 AM CDT | Severe Thunderstorm Warning | EWX | Calhoun, Jackson | 68 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1986Every severe thunderstorm warning in 1986
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.