Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 70, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 26, 1999, 7:56 AM CDT for Bandera County, Texas. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 26, 1999, 7:56 AM CDT (12:56 UTC)
- Expired
- Apr 26, 1999, 8:30 AM CDT
- In force
- 34 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Bandera County, TX
The radar
The Laughlin AFB radar (KDFX), 113 km from the middle of the area, began a volume at 13:00 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 26, 3:15 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 0.9 hours before the alert went out and 291 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
- 1709 J/kg
- Mixed-layer CIN
- -132 J/kg
- Mixed-layer LCL
- 693 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 117 m²/s²
- 0-3 km storm-relative helicity
- 174 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 4.9
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, Apr 26, 5:47 AM CDT, 2 hours 9 minutes before
TXZ171>173-183>194-202>209-217>225-228-262201- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 547 AM CDT MON APR 26 1999 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS MORNING. A LINE OF STRONG TO SEVERE THUNDERSTORMS HAS DEVELOPED ALONG AND JUST AHEAD OF A COLD FRONTAL BOUNDARY. THE STORMS ARE CAPABLE OF PRODUCING LARGE HAIL...WIND GUSTS IN EXCESS OF 50 MPH AND DEADLY LIGHTNING. THE STORMS ARE MOVING ACROSS THE HILL COUNTRY TO THE EAST AT 40 MPH. AT THIS SPEED THE STORMS WILL EXIT THE HILL COUNTRY AND AFFECT THE INTERSTATE 35 CORRIDOR AROUND RUSH HOUR...THEN MOVE ACROSS NORTHERN SECTIONS OF SOUTH CENTRAL TEXAS BEFORE NOON. RAINFALL AMOUNTS FROM THE STORMS WILL AVERAGE 1/2 TO 1 INCH WITH HIGHER TOTALS OF 3 INCHES POSSIBLE MAINLY EAST OF THE INTERSTATE 35 CORRIDOR. THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF THE ZONE FORECASTS...SHORT TERM FORECAST...WATCHES...WARNINGS AND ADVISORIES. THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED ONLY IF UNEXPECTED HAZARDOUS WEATHER DEVELOPS OR IF EXPECTED HAZARDOUS WEATHER NO LONGER IS FORECAST TO DEVELOP. FOR INFORMATION ON WEATHER THREATS IN AREAS SURROUNDING SOUTH CENTRAL TEXAS...PLEASE REFER TO THE HAZARDOUS WEATHER OUTLOOKS FROM NWS OFFICES IN MIDLAND...SAN ANGELO...FORT WORTH...HOUSTON/GALVESTON AND CORPUS CHRISTI.
Special weather statement, Apr 26, 5:47 AM CDT, 2 hours 9 minutes before
TXZ171>173-183>194-202>209-217>225-228-262201- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 547 AM CDT MON APR 26 1999 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS MORNING. A LINE OF STRONG TO SEVERE THUNDERSTORMS HAS DEVELOPED ALONG AND JUST AHEAD OF A COLD FRONTAL BOUNDARY. THE STORMS ARE CAPABLE OF PRODUCING LARGE HAIL...WIND GUSTS IN EXCESS OF 50 MPH AND DEADLY LIGHTNING. THE STORMS ARE MOVING ACROSS THE HILL COUNTRY TO THE EAST AT 40 MPH. AT THIS SPEED THE STORMS WILL EXIT THE HILL COUNTRY AND AFFECT THE INTERSTATE 35 CORRIDOR AROUND RUSH HOUR...THEN MOVE ACROSS NORTHERN SECTIONS OF SOUTH CENTRAL TEXAS BEFORE NOON. RAINFALL AMOUNTS FROM THE STORMS WILL AVERAGE 1/2 TO 1 INCH WITH HIGHER TOTALS OF 3 INCHES POSSIBLE MAINLY EAST OF THE INTERSTATE 35 CORRIDOR. THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF THE ZONE FORECASTS...SHORT TERM FORECAST...WATCHES...WARNINGS AND ADVISORIES. THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED ONLY IF UNEXPECTED HAZARDOUS WEATHER DEVELOPS OR IF EXPECTED HAZARDOUS WEATHER NO LONGER IS FORECAST TO DEVELOP. FOR INFORMATION ON WEATHER THREATS IN AREAS SURROUNDING SOUTH CENTRAL TEXAS...PLEASE REFER TO THE HAZARDOUS WEATHER OUTLOOKS FROM NWS OFFICES IN MIDLAND...SAN ANGELO...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 |
|---|---|---|---|---|
| Apr 26, 12:39 AM CDT | Severe Thunderstorm Warning | EWX | Maverick | 51 min |
| Apr 26, 5:49 AM CDT | Severe Thunderstorm Warning | EWX | Medina | 61 min |
| Apr 26, 6:07 AM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Bexar | 63 min |
| Apr 26, 10:54 AM CDT | Severe Thunderstorm Warning | EWX | Karnes | 56 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1999Every severe thunderstorm warning in 1999
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; radar from the NEXRAD Level II archive.