Alert archive / Texas / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 18, NWS Brownsville, TX
NWS Brownsville, TX issued this severe thunderstorm warning at May 18, 2010, 5:20 AM CDT for Zapata County, Texas. It was in force for 55 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
- May 18, 2010, 5:20 AM CDT (10:20 UTC)
- Expired
- May 18, 2010, 6:15 AM CDT
- In force
- 55 min
- Issued by
- NWS Brownsville, TX
- Area
- Storm-based polygon
County Zapata County, TX
The radar
The Corpus Christi radar (KCRP), 185 km from the middle of the area, began a volume at 10:22 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
Corpus Christi, TX (KCRP), launched 00:00Z, 10.3 hours before the alert went out and 198 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
- 1401 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 1374 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.4
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 May 18, 4:35 AM CDT, 45 minutes earlier.
Area forecast discussion, May 18, 4:35 AM CDT, 45 minutes before
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</html>Hazardous weather outlook, May 18, 4:02 AM CDT, 1 hour 18 minutes before
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</html>In the hours before
Special weather statement, May 18, 4:13 AM CDT, 1 hour 7 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BROWNSVILLE TX 413 AM CDT TUE MAY 18 2010 TXZ248>251-181115- ZAPATA-JIM HOGG-BROOKS-KENEDY- INCLUDING THE CITIES OF...ZAPATA...HEBBRONVILLE...FALFURRIAS... SARITA 413 AM CDT TUE MAY 18 2010 ...SEVERE THUNDERSTORMS LOCATED JUST NORTH OF THE REGION... NATIONAL WEATHER SERVICE DOPPLER RADAR IN BROWNSVILLE IS TRACKING A LARGE AREA OF SEVERE THUNDERSTORMS...LOCATED OVER WEBB AND DUVAL COUNTY. THE MOST INTENSE PORTION OF THE SEVERE THUNDERSTORMS IS LOCATED ABOUT 34 MILES NORTHWEST OF HEBBRONVILLE...WITH THE WHOLE THUNDERSTORM COMPLEX MOVING GENERALLY TO THE EAST AND SOUTHEAST AT AROUND 20 MPH. LARGE HAIL AND DAMAGING WINDS MAY AFFECT PORTIONS OF ZAPATA...JIM HOGG...BROOKS...AND KENEDY COUNTY WITHIN THE NEXT COUPLE OF HOURS. RESIDENTS IN THESE COUNTIES SHOULD MONITOR LOCAL MEDIA SOURCES FOR THE LATEST INFORMATION REGARDING THIS DEVELOPING WEATHER SITUATION. TOMASELLI
The office that day
Everything else NWS Brownsville, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 4:41 AM CDT | Severe Thunderstorm Warning | BRO | Jim Hogg | 94 min |
| May 18, 6:16 AM CDT | Severe Thunderstorm Warning | BRO | Jim Hogg, Starr, Zapata | 59 min |
| May 18, 7:17 AM CDT | Special Marine Warning | BRO | 43 min | |
| May 18, 8:01 AM CDT | Special Marine Warning | BRO | 44 min | |
| May 18, 8:04 AM CDT | Areal Flood Advisory | BRO | Brooks | 56 min |
| May 18, 8:29 AM CDT | Tornado Warning | BRO | Hidalgo | 20 min |
| May 18, 8:37 AM CDT | Tornado Warning | BRO | Cameron | 17 min |
| May 18, 8:57 AM CDT | Tornado Warning | BRO | Willacy | 33 min |
| May 18, 9:07 AM CDT | Flash Flood Warning | BRO | Hidalgo | 53 min |
| May 18, 9:20 AM CDT | Severe Thunderstorm Warning | BRO | Cameron, Willacy | 55 min |
| May 18, 9:32 AM CDT | Special Marine Warning | BRO | 88 min | |
| May 18, 9:52 AM CDT | Areal Flood Advisory | BRO | Cameron | 53 min |
| May 18, 9:59 AM CDT | Areal Flood Advisory | BRO | Willacy | 61 min |
| May 18, 10:13 AM CDT | Severe Thunderstorm Warning | BRO | Cameron | 32 min |
| May 18, 11:08 AM CDT | Special Marine Warning | BRO | 52 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2010Every severe thunderstorm warning in 2010
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.