Alert archive / Texas / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 1, NWS Brownsville, TX
NWS Brownsville, TX issued this severe thunderstorm warning at Apr 7, 2019, 6:49 AM CDT for Starr County, Zapata County, Texas. It was in force for 56 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 7, 2019, 6:49 AM CDT (11:49 UTC)
- Expired
- Apr 7, 2019, 7:45 AM CDT
- In force
- 56 min
- Issued by
- NWS Brownsville, TX
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
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 11:50 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 7, 1:55 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 11.8 hours before the alert went out and 191 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
- 2128 J/kg
- Mixed-layer CIN
- -136 J/kg
- Mixed-layer LCL
- 1337 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.7
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 Apr 7, 3:45 AM CDT, 3 hours 4 minutes earlier.
Area forecast discussion, Apr 7, 3:45 AM CDT, 3 hours 4 minutes before
Area Forecast Discussion National Weather Service Brownsville TX 345 AM CDT Sun Apr 7 2019 .SHORT TERM (Now through Monday): The conv complex that fired up over north central Mexico is starting to expand eastwards towards portions of southern TX. This area of conv is moving into a pretty favorable environment with pretty high surface dewpoints. Also LAPS CAPE values across much of southern and Deep South TX shows values generally ranging from 2500-3000 J/KG early this morning. Meanwhile aloft at 500 mb, a pretty strong and deep trough axis will dig across much of southern TX this morning which will maintain good PVA across the region which will also help drive the strengthening conv across the region. Once this 500mb trough axis clears the region to the east, the conv potential will drop significantly as drier and more stable air aloft moves into the region from the west. Accordingly expect near zero pops to prevail after today for tonight into Mon. SVR WW 40 will continue for the northern 4 Ranchland counties this morning through 9 AM as the southern edge of the conv complex moving out of Mexico could move through region resulting in some potentially severe thunderstorms. The high temps today will be held down somewhat by the conv expected across the region. As drier air moves into the region overnight and Mon, the high temps will rebound somewhat due to increased diurnal effects. Will lean towards the warmer side of temp guidance throughout the short term especially for Mon due to the stronger diurnal heating. .LONG TERM (Monday Night through Saturday): The mid-level trough axis will move east of the region Monday night. Large scale subsidence will prevail through much of the week as 500 mb ridge builds overhead. This will generally lead to very warm to hot and rain-free conditions through most of the period. Breezy south winds are expected on Wednesday as the pressure gradient strengthens as surface low pressure develops across the Plains. A very dry cold front is expected to move into deep south Texas on Thursday. Rain chances increase late Friday into the weekend as southeast flow brings moisture back northward as the old frontal boundary lingers across the area. Temperatures will be above normal through much the period. && .MARINE (Now through Monday): A generally light surface wind regime will prevail throughout Mon due to a weak PGF. This will hold down the Bay and Gulf swells below SCA levels. The conv complex expected to move out over the lower TX Bay and Gulf waters will be the most hazardous marine conditions of the short term period with a increased potential for SMWs throughout the morning hours today. No SCA conditions expected through Mon. Monday night through Thursday night: Light winds and variable winds are expected Monday night and Tuesday with high pressure across the Western Gulf of Mexico. Winds will become southeast and increase Tuesday night through Wednesday night as the pressure gradient strengthens along the lower Texas coast. Small craft advisories may be needed for the Laguna Madre Wednesday and the Gulf waters Wednesday night. Winds are expected to decrease on Thursday as a weak frontal boundary drifts into south Texas allowing the pressure gradient to weaken across the area. && .PRELIMINARY POINT TEMPS/POPS... BAYVIEW/PORT ISABEL 82 65 82 64 / 70 10 10 0 BROWNSVILLE 84 65 86 63 / 60 10 10 0 HARLINGEN 85 64 87 62 / 70 10 10 0 MCALLEN 86 66 91 64 / 60 10 10 0 RIO GRANDE CITY 87 64 91 63 / 60 0 10 0 SOUTH PADRE ISLAND 75 66 75 66 / 70 10 10 0 && .BRO WATCHES/WARNINGS/ADVISORIES... TX...None. GM...None. && This product is also available on the web at: HTTP://WEATHER.GOV/RGV Short Term...60 Long Term...63 Graphicast/Upper Air...67
Hazardous weather outlook, Apr 7, 5:15 AM CDT, 1 hour 34 minutes before
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</html>In the hours before
Special weather statement, Apr 7, 6:17 AM CDT, 32 minutes before
Special Weather Statement
National Weather Service Brownsville TX
617 AM CDT SUN APR 7 2019
TXZ248-249-252-071245-
Jim Hogg TX-Zapata TX-Starr TX-
617 AM CDT SUN APR 7 2019
...SIGNIFICANT WEATHER ADVISORY FOR WESTERN JIM HOGG...NORTHWESTERN
STARR AND ZAPATA COUNTIES UNTIL 745 AM CDT...
At 615 AM CDT, National Weather Service Doppler radar was tracking
strong thunderstorms along a line extending from 27 miles southwest
of El Cenizo to 18 miles west of Falcon Mesa to 24 miles west of
Falcon Dam. Movement was east at 30 to 35 mph.
Nickel size hail and winds in excess of 40 mph will be possible with
these storms.
Locations impacted include...
Zapata, El Sauz, Viboras, Lopeno, Bustamante, Medina, New Falcon,
Zapata High School, Randado and Zapata Middle School.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
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 900 AM CDT for
Deep South Texas.
LAT...LON 2709 9943 2711 9944 2718 9943 2727 9945
2727 9877 2689 9876 2650 9870 2650 9910
2652 9913 2654 9917 2672 9921 2675 9924
2684 9927 2687 9932 2692 9933 2694 9939
2698 9938 2702 9942 2702 9945 2706 9945
TIME...MOT...LOC 1115Z 263DEG 25KT 2700 9976 2682 9959 2658 9956
60/SPEECEThe office that day
Everything else NWS Brownsville, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 6:17 AM CDT | Special Weather Statement | BRO | Starr, Zapata | 88 min |
| Apr 7, 7:00 AM CDT | Special Weather Statement | BRO | Brooks, Jim Hogg | 60 min |
| Apr 7, 7:17 AM CDT | Severe Thunderstorm Warning | BRO | Brooks, Hidalgo, Jim Hogg, Starr | 58 min |
| Apr 7, 7:26 AM CDT | Areal Flood Advisory | BRO | Starr, Zapata | 2 hr |
| Apr 7, 7:42 AM CDT | Severe Thunderstorm Warning | BRO | Hidalgo, Starr | 63 min |
| Apr 7, 8:08 AM CDT | Special Marine Warning | BRO | 112 min | |
| Apr 7, 8:19 AM CDT | Special Weather Statement | BRO | Kenedy | 41 min |
| Apr 7, 8:39 AM CDT | Special Weather Statement | BRO | Cameron, Hidalgo, Willacy | 66 min |
| Apr 7, 9:08 AM CDT | Severe Thunderstorm Warning | BRO | Cameron, Willacy | 52 min |
| Apr 7, 9:59 AM CDT | Special Weather Statement | BRO | Cameron | 31 min |
| Apr 7, 10:04 AM CDT | Special Marine Warning | BRO | 116 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2019Every severe thunderstorm warning in 2019
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.