Alert archive / Texas / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 91, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at May 27, 2020, 4:06 PM CDT for Harris County, Liberty County, Montgomery County, Texas. It was in force for 24 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 27, 2020, 4:06 PM CDT (21:06 UTC)
- Expired
- May 27, 2020, 4:30 PM CDT
- In force
- 24 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Harris County, TX, Liberty County, TX, Montgomery County, TX
The radar
The Houston radar (KHGX), 72 km from the middle of the area, began a volume at 21:09 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 |
|---|---|---|---|
| May 27, 1:24 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.1 hours before the alert went out and 196 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
- 827 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 1257 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
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 Houston/Galveston, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 27, 1:32 PM CDT, 2 hours 34 minutes earlier.
Area forecast discussion, May 27, 1:32 PM CDT, 2 hours 34 minutes before
Area Forecast Discussion National Weather Service Houston/Galveston TX 132 PM CDT Wed May 27 2020 .AVIATION... Periods of SHRA/TSRA expected this afternoon and evening. Strong to severe thunderstorms are possible along areas N of I-10 with the highest probabilities of them developing over the NW quadrant of the CWA. Hazards with these storms will be hail, strong winds/downbursts, and lightning. Periods of IFR to MVFR vis/cigs are also possible with +RA. A Severe Thunderstorm Watch is in effect through 9 PM CDT today for most of the CWA. Conditions improve overnight and winds will be light and VRB. Another round of Iso to SCT SHRA/TSRA expected Thursday. 24 && .PREV DISCUSSION... /ISSUED 1142 AM CDT Wed May 27 2020/ UPDATE... Minor adjustments to the T, PoPs, and Wx were made to the inherited forecast for Today. Showers and thunderstorms continue to be expected this afternoon and evening, with strong to severe thunderstorms potentially developing over the NW quadrant of the CWA. SPC continues the Enhanced Risk for Severe Thunderstorms along the Colorado, Austin, Washington, Burleson, Brazos, and Waller counties and a Slight Risk for most of the rest of SE Texas. The most likely hazards with these storms are expected to be hail and damaging winds; there is a low probability of tornado (5%) development across the NW counties. 24 && .PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 65 86 66 88 67 / 80 40 10 10 0 Houston (IAH) 69 89 69 90 70 / 40 50 10 10 10 Galveston (GLS) 76 85 75 88 76 / 20 40 20 20 10 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...NONE. GM...NONE. && Aviation...24
In the hours before
Local storm report, May 27, 2:43 PM CDT, 1 hour 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
243 PM CDT WED MAY 27 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0239 PM HAIL 3 N COLLEGE STATION 30.63N 96.35W
05/27/2020 E1.50 INCH BRAZOS TX TRAINED SPOTTER
PING PONG SIZED HAIL WAS REPORTED.
&&Local storm report, May 27, 2:48 PM CDT, 1 hour 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
248 PM CDT WED MAY 27 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0240 PM HAIL 3 SE UR089 30.68N 96.37W
05/27/2020 E1.75 INCH BRAZOS TX LAW ENFORCEMENT
GOLF BALL SIZE HAIL REPORTED IN THE BRYAN
AREA.
&&Local storm report, May 27, 2:52 PM CDT, 1 hour 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
252 PM CDT WED MAY 27 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0241 PM TSTM WND GST COLLEGE STATION 30.59N 96.36W
05/27/2020 M62 MPH BRAZOS TX ASOS
WIND GUST WAS OBSERVED AT THE KCLL ASOS.
&&Local storm report, May 27, 2:56 PM CDT, 1 hour 10 minutes before
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</html>Local storm report, May 27, 2:59 PM CDT, 1 hour 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
259 PM CDT WED MAY 27 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0245 PM HAIL 3 S BRYAN 30.67N 96.34W
05/27/2020 E1.00 INCH BRAZOS TX PUBLIC
QUARTER SIZED HAIL NEAR THE INTERSECTION OF
WILLIAM J BRYAN AND HIGHWAY 6.
&&Special weather statement, May 27, 3:52 PM CDT, 14 minutes before
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</head>
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<h1 id="headline">This service is currently unavailable.</h1>
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</html>The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 7:12 PM CDT | Special Weather Statement | HGX | Chambers | 48 min |
| May 26, 7:17 PM CDT | Severe Thunderstorm Warning | HGX | Chambers, Liberty | 43 min |
| May 26, 7:24 PM CDT | Areal Flood Advisory | HGX | Chambers, Liberty | 66 min |
| May 26, 8:23 PM CDT | Special Weather Statement | HGX | Chambers | 52 min |
| May 26, 9:25 PM CDT | Special Weather Statement | HGX | Chambers | 50 min |
| May 26, 9:30 PM CDT | Areal Flood Advisory | HGX | Chambers | 2 hr |
| May 26, 10:21 PM CDT | Special Marine Warning | HGX | 54 min | |
| May 27, 1:45 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Burleson | 60 min |
| May 27, 2:42 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Burleson, Grimes, Washington | 48 min |
| May 27, 3:08 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Brazos, Grimes, Harris, Montgomery, Waller and 1 more | 52 min |
| May 27, 3:21 PM CDT | Tornado Warning | HGX | Grimes, Harris, Montgomery, Waller, Washington | 24 min |
| May 27, 3:52 PM CDT | Special Weather Statement | HGX | Liberty | 38 min |
| May 27, 3:54 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Fort Bend, Harris, Montgomery, Waller | 36 min |
| May 27, 4:28 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Brazoria, Chambers, Fort Bend, Galveston, Harris and 4 more | 62 min |
| May 27, 4:29 PM CDT | Special Marine Warning | HGX | 61 min | |
| May 27, 4:45 PM CDT | Areal Flood Advisory | HGX | Brazoria, Fort Bend, Harris | 2 hr |
| May 27, 4:50 PM CDT | Tornado Warning | HGX | Chambers, Galveston, Harris | 13 min |
| May 27, 5:06 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty | 54 min |
| May 27, 5:14 PM CDT | Special Marine Warning | HGX | 31 min | |
| May 27, 5:28 PM CDT | Areal Flood Advisory | HGX | Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty | 115 min |
| May 27, 5:34 PM CDT | Severe Thunderstorm Warning | HGX | Fort Bend, Wharton | 26 min |
| May 27, 5:43 PM CDT | Special Marine Warning | HGX | 62 min | |
| May 27, 6:09 PM CDT | Special Weather Statement | HGX | Burleson | 51 min |
| May 27, 6:51 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Grimes, Montgomery, Walker | 39 min |
| May 27, 6:55 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Burleson, Washington | 20 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2020Every severe thunderstorm warning in 2020
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.