Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 100, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jun 1, 2001, 4:29 PM CDT for Llano County, Texas. It was in force for 61 min. 1 report came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Jun 1, 2001, 4:29 PM CDT (21:29 UTC)
- Expired
- Jun 1, 2001, 5:30 PM CDT
- In force
- 61 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Llano County, TX
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 1, 5:00 PM CDT | Hail 0.75 | Llano, TX |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 1, 2:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 9.5 hours before the alert went out and 271 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1334 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
607 WUUS54 KEWX 012130 SVRSAT TXC299-012230- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 429 PM CDT FRI JUN 1 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS... LLANO * UNTIL 530 PM CDT * AT 429 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORMS FROM CASTELL TO LLANO...MOVING EAST AT 20 MPH. * THIS WARNING INCLUDES LOCATIONS IN AND AROUND... LLANO HAIL TO GOLF BALL SIZE AND WIND GUSTS TO 55 MPH CAN BE EXPECTED WITH THESE STORMS. LAT...LON 3082 9894 3053 9892 3055 9842 3092 9849
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.
NWS Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 1, 3:23 PM CDT, 1 hour 6 minutes earlier.
Area forecast discussion, Jun 1, 3:23 PM CDT, 1 hour 6 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 323 PM CDT FRI JUN 01 2001 SEVERE THUNDERSTORM DEVELOPMENT IN HIGH CAPE ENVIRONMENT OVER WEST CENTRAL TX HAS TURNED A LOW POP DAY INTO A GOOD CHANCE OF STORMS OVER THE HILL COUNTRY AND ESCARPMENT COUNTIES OF SOUTH CENTRAL TX. SEVERE THUNDERSTORMS WITH POSSIBLE SUPERCELLS ARE ALREADY INVADING THE HILL COUNTRY. WITH DIFFLUENT FLOW ALOFT, THE POTENTIAL FOR LOCALLY HEAVY RAINFALL EXISTS BUT STEADY TRACKING OF ORGANIZED THUNDERSTORMS SHOULD LIMIT THE POTENTIAL FOR WIDESPREAD FLASH FLOODING. WILL INCLUDE A LATE AFTERNOON GROUPING IN AREAS UNDER THE WATCH. BEST MOISTURE INFLOW SUGGESTED FROM THE ETA WILL ARRIVE FROM DUE SOUTH WHICH WILL OFFSET THE TENDENCY FOR UPPER LEVEL WINDS TO PUSH STORMS EAST SOUTHEAST. WILL GO WITH SLIGHT CHANCE POPS FOR THE WESTERN COUNTIES AS THE OUTFLOW BOUNDARIES MAY BEGIN TO COLLIDE WITH OROGRAPHIC THUNDERSTORM BOUNDARIES TOWARD SUNSET. MOISTURE POOLING AND RAINFALL SHOULD RESULT IN PATCHY FOG TOWARD MORNING CENTRAL AND EAST AND MORE STABLE AIR SHOULD BUILD IN ALOFT OVERNIGHT. WITH A STRONG LOW PRESSURE SYSTEM SET TO MOVE ONSHORE OVER THE PACIFIC NW, EXPECT THE EASTARD SHIFT OF THE UPPER RIDGE TO BE ENOUGH TO CAP THE ENVIRONMENT AND REDUCE LAPSE RATES TOMORROW. LATER FORECAST PERIODS SHOULD NOT LOOK MUCH DIFFERENT THAN THEY DID THIS MORNING AS MODELS SHOWING FAIR TO GOOD CONSISTENCY AND AGREEMENT ON DROPPING ANOTHER LOW INTO THE PLAINS AND CREATING MORE NW FLOW STORMS TUESDAY AND WEDNESDAY. UPPER PATTERN SUGGESTS UNSTABLE NORTHERLY FLOW ALOFT TO CONTINUE THURSDAY AND FRIDAY, BUT WITH LOW AMOUNTS OF MOISTURE. WILL LEAVE THURSDAY AND FRIDAY FAIR FOR NOW AND WAIT AND SEE IF MODELS PICK UP MORE MOISTURE IN LATER RUNS. PRELIMINARY NUMBERS... AUS 068/093/074/092 5--0 DRT 073/103/075/102 2--0 SAT 071/093/075/092 5--0 .EWX...NONE. 18/23
In the hours before
Special weather statement, Jun 1, 1:02 PM CDT, 3 hours 27 minutes before
TXZ171>173-183>194-202>209-217>225-228-020000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 102 PM CDT FRI JUN 1 2001 AN AREA OF THUNDERSTORMS IN THE CONCHO VALLEY NEAR SAN ANGELO IS MOVING TOWARD THE SOUTHEAST AT 20 MPH. IF THIS AREA HOLDS TOGETHER THIS AFTERNOON...THE STORMS COULD MOVE INTO THE HILL COUNTRY AND AFFECT SOME OF THE COUNTIES LATE THIS AFTERNOON AND EARLY EVENING. IF THE ACTIVITY CONTINUES TO INCREASE IN INTENSITY AND AREAL COVERAGE...SOME OF THE STORMS COULD APPROACH SEVERE LIMITS AND CONTAIN HAIL...LIGHTNING AND LOCALLY HEAVY RAINFALL. LAW ENFORCEMENT AGENCIES...EMERGENCY MANAGEMENT OFFICIALS...STORM SPOTTER GROUPS AND OTHER INTERESTED CONCERNS SHOULD MONITOR THIS SITUATION AND TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN YOUR AREA. STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL TELEVISION OR RADIO STATIONS...OR YOUR CABLE TELEVISION PROVIDER FOR LATER STATEMENTS. FOR INFORMATION ON WEATHER THREATS IN SURROUNDING AREAS...PLEASE REFER TO OUTLOOKS FROM OFFICES IN SAN ANGELO...MIDLAND/ODESSA...FORT WORTH...HOUSTON/GALVESTON AND CORPUS CHRISTI.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 4:53 PM CDT | Severe Thunderstorm Warning | EWX | Gillespie | 67 min |
| Jun 1, 5:32 PM CDT | Severe Thunderstorm Warning | EWX | Burnet | 43 min |
| Jun 1, 5:45 PM CDT | Severe Thunderstorm Warning | EWX | Kerr | 60 min |
| Jun 1, 6:01 PM CDT | Severe Thunderstorm Warning | EWX | Kendall | 59 min |
| Jun 1, 6:08 PM CDT | Severe Thunderstorm Warning | EWX | Bandera | 67 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2001Every severe thunderstorm warning in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.