Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 9, NWS Brownsville, TX
NWS Brownsville, TX issued this severe thunderstorm warning at Mar 27, 1999, 8:18 PM CST for Starr County, Zapata County, Texas. It was in force for 42 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
- Mar 27, 1999, 8:18 PM CST (02:18 UTC)
- Expired
- Mar 27, 1999, 9:00 PM CST
- In force
- 42 min
- Issued by
- NWS Brownsville, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Starr County, TX, Zapata County, TX
The radar
The Brownsville radar (KBRO), 181 km from the middle of the area, began a volume at 02:22 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 nearest sounding before it
Brownsville Intl, TX (KBRO), launched 00:00Z, 2.3 hours before the alert went out and 183 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
- 1929 J/kg
- Mixed-layer CIN
- -124 J/kg
- Mixed-layer LCL
- 598 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.3
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.
NWS Brownsville, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 27, 7:45 PM CST, 33 minutes earlier.
Area forecast discussion, Mar 27, 7:45 PM CST, 33 minutes before
DEEP SOUTH TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE BROWNSVILLE TX 745 PM CST SAT MAR 27 1999 SIGNIFICANT WEATHER UNDERWAY OVER NORTHEAST MEXICO AND DEEP SOUTH TEXAS CAUSED BY UPPER AIR LOW AMBLING SLOWLY NORTHEAST FROM MEXICO..WILL TAPER OFF LATE LATER TONIGHT AS ENERGY MAKING STORMS RACES NORTHEAST. HOWEVER..STORM DEVELOPMENT IS EXPECTED AGAIN TOMORROW BUT STARTING MORE EAST THAN CURRENT POSITION KEEPING WITH LOWS EASTWARD MIGRATION. FORECAST UNDERWAY LOOKS APPROPRIATE WITH 60 POPS TONIGHT AND TOMORROW..POSSIBLY SEVERE STORMS..HEAVY RAINFALL. PRECIP ALGO SUPPORTS THE POPS. BY TOMORROW NIGHT..LAND AREA WILL BE UNDER THE INFLUENCE OF SUBSIDING AIR IN THE LOWS WAKE..GULF OF MEXICO WILL NOT HOWEVER..WHERE STORMY WEATHER WILL DOMINATE. SO FAR..MOST DAMAGE HAS BEEN FROM WIND. .BRO...SCA RIO GRANDE-BAFFIN BAY OUT 50 NM INCLUDING BAYS. GRADIENT IS STILL QUITE STRONG. 62
In the hours before
Special weather statement, Mar 27, 3:07 PM CST, 5 hours 11 minutes before
TXZ248>255-281200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BROWNSVILLE TX 307 PM CST SAT MAR 27 1999 ...GOOD POTENTIAL FOR SIGNIFICANT RAINFALL OVER DEEP SOUTH TEXAS TONIGHT AND SUNDAY... A VIGOROUS UPPER LEVEL STORM SYSTEM WAS CENTERED SOUTHWEST OF BIG BEND NEAR CHIHUAHUA MEXICO SATURDAY AFTERNOON. THIS SYSTEM IS EXPECTED TO TRACK EAST TO SOUTHEAST OVER THE NEXT 24 TO 36 HOURS... BRINGING THE BEST CHANCE IN SOME TIME FOR SIGNIFICANT RAINFALL TO DEEP SOUTH TEXAS. STRONG SOUTHEAST WIND HAS SUPPLIED THE AREA WITH MORE THAN ADEQUATE MOISTURE...WHILE THE APPROACHING AREA OF LOW PRESSURE SHOULD SUPPLY THE NECESSARY DESTABILIZATION AND ENERGY NECESSARY TO PRODUCE SHOWERS AND THUNDERSTORMS. THE BEST CHANCES WILL BE FROM THIS EVENING THROUGH EARLY SUNDAY AFTERNOON. DUE TO THE EXPECTED CONVECTIVE NATURE OF THIS SYSTEM...RAINFALL AMOUNTS ARE LIKELY TO VARY WIDELY ACROSS THE REGION. WHILE SOME LOCATIONS MAY RECEIVE LITTLE OR NO PRECIPITATION...THE POTENTIAL EXISTS FOR SOME SHOWERS OR STORMS TO PRODUCE VERY HEAVY RAIN... WHICH COULD LEAD TO AMOUNTS IN EXCESS OF TWO INCHES. ALTHOUGH THE GROUND ACROSS THE REGION IS VERY DRY AND CAPABLE OF ABSORBING SIGNIFICANT RAINFALL...HEAVY SHOWERS OR THUNDERSTORMS COULD PRODUCE QUICK RUNOFF AND LOCALIZED FLASH-FLOODING...PARTICULARLY IN LOW- LYING AND FLASH-FLOOD PRONE AREAS. PERSONS IN DEEP SOUTH TEXAS SHOULD STAY UPDATED ON THIS DEVELOPING WEATHER SITUATION THROUGH NOAA WEATHER RADIO...FURTHER STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE...OR THEIR LOCAL MEDIA OUTLET OF CHOICE. VALONE
Special weather statement, Mar 27, 3:07 PM CST, 5 hours 11 minutes before
TXZ248>255-281200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BROWNSVILLE TX 307 PM CST SAT MAR 27 1999 ...GOOD POTENTIAL FOR SIGNIFICANT RAINFALL OVER DEEP SOUTH TEXAS TONIGHT AND SUNDAY... A VIGOROUS UPPER LEVEL STORM SYSTEM WAS CENTERED SOUTHWEST OF BIG BEND NEAR CHIHUAHUA MEXICO SATURDAY AFTERNOON. THIS SYSTEM IS EXPECTED TO TRACK EAST TO SOUTHEAST OVER THE NEXT 24 TO 36 HOURS... BRINGING THE BEST CHANCE IN SOME TIME FOR SIGNIFICANT RAINFALL TO DEEP SOUTH TEXAS. STRONG SOUTHEAST WIND HAS SUPPLIED THE AREA WITH MORE THAN ADEQUATE MOISTURE...WHILE THE APPROACHING AREA OF LOW PRESSURE SHOULD SUPPLY THE NECESSARY DESTABILIZATION AND ENERGY NECESSARY TO PRODUCE SHOWERS AND THUNDERSTORMS. THE BEST CHANCES WILL BE FROM THIS EVENING THROUGH EARLY SUNDAY AFTERNOON. DUE TO THE EXPECTED CONVECTIVE NATURE OF THIS SYSTEM...RAINFALL AMOUNTS ARE LIKELY TO VARY WIDELY ACROSS THE REGION. WHILE SOME LOCATIONS MAY RECEIVE LITTLE OR NO PRECIPITATION...THE POTENTIAL EXISTS FOR SOME SHOWERS OR STORMS TO PRODUCE VERY HEAVY RAIN... WHICH COULD LEAD TO AMOUNTS IN EXCESS OF TWO INCHES. ALTHOUGH THE GROUND ACROSS THE REGION IS VERY DRY AND CAPABLE OF ABSORBING SIGNIFICANT RAINFALL...HEAVY SHOWERS OR THUNDERSTORMS COULD PRODUCE QUICK RUNOFF AND LOCALIZED FLASH-FLOODING...PARTICULARLY IN LOW- LYING AND FLASH-FLOOD PRONE AREAS. PERSONS IN DEEP SOUTH TEXAS SHOULD STAY UPDATED ON THIS DEVELOPING WEATHER SITUATION THROUGH NOAA WEATHER RADIO...FURTHER STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE...OR THEIR LOCAL MEDIA OUTLET OF CHOICE. VALONE
Special weather statement, Mar 27, 3:35 PM CST, 4 hours 43 minutes before
TXZ248>255-281200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BROWNSVILLE TX 335 PM CST SAT MAR 27 1999 ...SLIGHT RISK FOR SEVERE THUNDERSTORMS LATE THIS AFTERNOON THROUGH TONIGHT OVER DEEP SOUTH TEXAS AND ADJACENT GULF COASTAL WATERS... ENERGY FROM AN APPROACHING STRONG UPPER LEVEL STORM SYSTEM FROM MEXICO WILL INTERACT WITH ABUNDANT MOISTURE PRESENT OVER DEEP SOUTH TEXAS TO PRODUCE SHOWERS AND THUNDERSTORMS OVER THE AREA. A FEW OF THE THUNDERSTORMS COULD BECOME SEVERE...PRODUCING LARGE HAIL OR DAMAGING WIND IN EXCESS OF 55 MPH. IN ADDITION TO THE POTENTIAL FOR LARGE HAIL OR DAMAGING WIND...LIGHTNING AND VERY HEAVY RAIN WHICH COULD LEAD TO FLASH-FLOODING ARE ALSO POSSIBLE. PERSONS IN DEEP SOUTH TEXAS SHOULD CONTINUE TO MONITOR THIS DEVELOPING WEATHER SITUATION FOR POSSIBLE SEVERE WEATHER WATCHES OR WARNINGS THROUGH NOAA WEATHER RADIO OR THEIR LOCAL MEDIA OUTLET OF CHOICE. VALONE
Special weather statement, Mar 27, 3:35 PM CST, 4 hours 43 minutes before
TXZ248>255-281200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BROWNSVILLE TX 335 PM CST SAT MAR 27 1999 ...SLIGHT RISK FOR SEVERE THUNDERSTORMS LATE THIS AFTERNOON THROUGH TONIGHT OVER DEEP SOUTH TEXAS AND ADJACENT GULF COASTAL WATERS... ENERGY FROM AN APPROACHING STRONG UPPER LEVEL STORM SYSTEM FROM MEXICO WILL INTERACT WITH ABUNDANT MOISTURE PRESENT OVER DEEP SOUTH TEXAS TO PRODUCE SHOWERS AND THUNDERSTORMS OVER THE AREA. A FEW OF THE THUNDERSTORMS COULD BECOME SEVERE...PRODUCING LARGE HAIL OR DAMAGING WIND IN EXCESS OF 55 MPH. IN ADDITION TO THE POTENTIAL FOR LARGE HAIL OR DAMAGING WIND...LIGHTNING AND VERY HEAVY RAIN WHICH COULD LEAD TO FLASH-FLOODING ARE ALSO POSSIBLE. PERSONS IN DEEP SOUTH TEXAS SHOULD CONTINUE TO MONITOR THIS DEVELOPING WEATHER SITUATION FOR POSSIBLE SEVERE WEATHER WATCHES OR WARNINGS THROUGH NOAA WEATHER RADIO OR THEIR LOCAL MEDIA OUTLET OF CHOICE. VALONE
The office that day
Everything else NWS Brownsville, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 6:02 PM CST | Severe Thunderstorm Warning | BRO | Zapata | 28 min |
| Mar 27, 6:38 PM CST | Severe Thunderstorm Warning | BRO | Hidalgo, Starr | 37 min |
| Mar 27, 7:17 PM CST | Severe Thunderstorm Warning | BRO | Hidalgo, Starr | 43 min |
| Mar 27, 8:04 PM CST | Severe Thunderstorm Warning | BRO | Hidalgo | 41 min |
| Mar 27, 8:28 PM CST | Tornado Warning | BRO | Hidalgo | 32 min |
| Mar 27, 8:33 PM CST | Severe Thunderstorm Warning | BRO | Cameron, Hidalgo, Kenedy, Willacy | 57 min |
| Mar 27, 9:04 PM CST | Severe Thunderstorm Warning | BRO | Jim Hogg, Starr, Zapata | 56 min |
| Mar 27, 9:54 PM CST | Flash Flood Warning | BRO | Jim Hogg, Starr | 4 hr |
| Mar 27, 10:00 PM CST | Severe Thunderstorm Warning | BRO | Jim Hogg, Starr | 60 min |
| Mar 27, 10:34 PM CST | Severe Thunderstorm Warning | BRO | Brooks, Hidalgo, Kenedy, Starr | 56 min |
| Mar 27, 10:50 PM CST | Tornado Warning | BRO | Hidalgo | 35 min |
| Mar 27, 11:22 PM CST | Tornado Warning | BRO | Hidalgo | 23 min |
| Mar 27, 11:28 PM CST | Severe Thunderstorm Warning | BRO | Cameron, Hidalgo, Kenedy, Willacy | 62 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.