Alert archive / Texas / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 67, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Aug 19, 2014, 3:15 PM CDT for Polk County, San Jacinto County, Texas. It was in force for 30 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
- Aug 19, 2014, 3:15 PM CDT (20:15 UTC)
- Expired
- Aug 19, 2014, 3:45 PM CDT
- In force
- 30 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
Counties Polk County, TX, San Jacinto County, TX
The radar
The Houston radar (KHGX), 135 km from the middle of the area, began a volume at 20:17 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
Lake Charles Mun, LA (KLCH), launched 12:00Z, 8.3 hours before the alert went out and 184 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
- 2936 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 845 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Aug 19, 12:38 PM CDT, 2 hours 37 minutes earlier.
Area forecast discussion, Aug 19, 12:38 PM CDT, 2 hours 37 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1238 PM CDT TUE AUG 19 2014
.DISCUSSION...
SEE THE 18Z AVIATION DISCUSSION BELOW.
40
&&
.AVIATION...
A MOISTURE ONSHORE FLOW WILL BE ENHANCED BY AN UPPER LOW OVER THE
CENTRAL PART OF THE STATE. SHOWERS AND ISOLATED THUNDERSTORMS HAVE
ALREADY FORMED AS OF 17Z AND EXPECT THAT THE COVERAGE MAY BECOME
MORE WIDESPREAD THIS AFTERNOON. EXPECT THE ACTIVITY TO DIMINISH
AROUND SUNSET.
WITH MORE LOW-LEVEL MOISTURE IN PLACE...AGREE WITH THE MODELS THAT
SOME OF THE SITES OUTSIDE OF THE METRO AREAS WILL PROBABLY
EXPERIENCE MVFR CONDITIONS TONIGHT.
A WEAK UPPER LEVEL DISTURBANCE WILL MOVE INTO SE TX FROM THE GULF
ON WEDNESDAY. THIS WILL PROBABLY LEAD TO EARLIER DEVELOPMENT OF
SHOWERS AND THUNDERSTORMS.
40
&&
.PREV DISCUSSION... /ISSUED 1001 AM CDT TUE AUG 19 2014/
DISCUSSION...
CURRENT FCST LOOKS FINE. NO UPDATE NEEDED THIS MORNING. 47
&&
.PRELIMINARY POINT TEMPS/POPS...
COLLEGE STATION (CLL) 78 97 78 98 77 / 10 20 10 10 10
HOUSTON (IAH) 78 96 79 97 77 / 10 30 10 20 10
GALVESTON (GLS) 84 92 84 93 83 / 20 40 20 20 10
&&
.HGX WATCHES/WARNINGS/ADVISORIES...
TX...HEAT ADVISORY UNTIL 7 PM CDT WEDNESDAY FOR THE FOLLOWING ZONES:
BRAZORIA...CHAMBERS...GALVESTON...JACKSON...MATAGORDA.
GM...NONE.
&&
DISCUSSION...47
AVIATION/MARINE...40Hazardous weather outlook, Aug 19, 4:38 AM CDT, 10 hours 37 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 438 AM CDT TUE AUG 19 2014 TXZ163-164-176>179-195>200-210>213-226-227-200945- AUSTIN-BRAZOS-BURLESON-COLORADO-FORT BEND-GRIMES-HARRIS-HOUSTON- LIBERTY-MADISON-MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WALLER- WASHINGTON-WHARTON- 438 AM CDT TUE AUG 19 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON. A FEW CELLS MAY BRIEFLY PULSE UP TO STRONG LEVELS AND PRODUCE 30 TO 45 MPH WIND GUSTS AND AN INCH OR TWO OF RAINFALL IN A SHORT PERIOD OF TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY AFTERNOON HEAT INDEX READINGS OF 102 TO 107 CAN BE EXPECTED. ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ARE POSSIBLE THROUGH WEDNESDAY. A FEW COULD BRIEFLY PULSE UP TO STRONG LEVELS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. TXZ214-235>238-200945- BRAZORIA-CHAMBERS-GALVESTON-JACKSON-MATAGORDA- 438 AM CDT TUE AUG 19 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT HEAT ADVISORY IN EFFECT. HEAT INDICES BETWEEN 105 AND 110 DEGREES ARE EXPECTED MAINLY DURING THE DAYLIGHT HOURS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY HEAT ADVISORY WILL CONTINUE UNTIL HEAT INDEX VALUES FALL BELOW 105 DEGREES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. GMZ330-335-350-355-370-375-200945- GALVESTON BAY-MATAGORDA BAY- WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL 20 NM TO 60 NM- WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL OUT 20 NM- WATERS FROM HIGH ISLAND TO FREEPORT 20 TO 60 NM- WATERS FROM HIGH ISLAND TO FREEPORT OUT 20 NM- 438 AM CDT TUE AUG 19 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
In the hours before
Local storm report, Aug 19, 1:35 PM CDT, 1 hour 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
135 PM CDT TUE AUG 19 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0131 PM MARINE TSTM WIND 1 N MORGAN'S POINT 29.69N 95.01W
08/19/2014 E46 MPH HARRIS TX COAST GUARD
ESTIMATED THUNDERSTORM GUST TO 40 KNOTS NEAR BAYTOWN.
&&
EVENT NUMBER HGX1400177
40Special weather statement, Aug 19, 1:35 PM CDT, 1 hour 40 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 135 PM CDT TUE AUG 19 2014 TXZ199-213-191915- HARRIS TX-MONTGOMERY TX- 135 PM CDT TUE AUG 19 2014 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MONTGOMERY AND NORTH CENTRAL HARRIS COUNTIES UNTIL 215 PM CDT... AT 134 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER THE WOODLANDS...MOVING NORTHEAST AT 25 MPH. WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... SOUTHEASTERN CONROE...TOMBALL...THE WOODLANDS...SPRING...OAK RIDGE NORTH...SHENANDOAH...SPLENDORA...PATTON VILLAGE...CUT AND SHOOT... WOODLOCH...PORTER HEIGHTS...SPLASHTOWN...THE WOODLANDS PAVILLION... CHATEAU WOODS AND HOOKS AIRPORT. LAT...LON 3002 9551 3011 9560 3041 9537 3023 9514 TIME...MOT...LOC 1834Z 222DEG 22KT 3012 9548
Special weather statement, Aug 19, 1:54 PM CDT, 1 hour 21 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
154 PM CDT TUE AUG 19 2014
TXZ199-200-213-192000-
HARRIS TX-LIBERTY TX-MONTGOMERY TX-
154 PM CDT TUE AUG 19 2014
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MONTGOMERY...
NORTHEASTERN HARRIS AND SOUTHWESTERN LIBERTY COUNTIES UNTIL 300 PM
CDT...
AT 154 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
LAKE HOUSTON...OR 7 MILES NORTH OF BARRETT...MOVING NORTHEAST AT 20
MPH.
WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
DAYTON...BARRETT...KINGWOOD...CROSBY...PLUM GROVE...KENEFICK...LAKE
HOUSTON DAM...LAKE HOUSTON...SHELDON AND EASTERN ATASCOCITA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.
&&
LAT...LON 2984 9509 2988 9521 3024 9509 3010 9482
3006 9491
TIME...MOT...LOC 1854Z 211DEG 17KT 2998 9510Special weather statement, Aug 19, 1:56 PM CDT, 1 hour 19 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
156 PM CDT TUE AUG 19 2014
TXZ178-179-200-192000-
SAN JACINTO TX-POLK TX-LIBERTY TX-
156 PM CDT TUE AUG 19 2014
...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL LIBERTY...
SOUTHEASTERN POLK AND EAST CENTRAL SAN JACINTO COUNTIES UNTIL 300 PM
CDT...
AT 155 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 9
MILES SOUTHWEST OF VOTAW...OR 11 MILES WEST OF THICKET...MOVING
NORTHEAST AT 20 MPH.
WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
ALABAMA-COUSHATTA RESERVATION...ROMAYOR...SEGNO AND RYE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.
&&
LAT...LON 3049 9457 3049 9473 3037 9469 3026 9480
3034 9496 3075 9472 3068 9458 3053 9455
3051 9455
TIME...MOT...LOC 1855Z 210DEG 17KT 3036 9481Special weather statement, Aug 19, 2:28 PM CDT, 47 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 228 PM CDT TUE AUG 19 2014 TXZ178-179-199-200-192015- SAN JACINTO TX-POLK TX-LIBERTY TX-MONTGOMERY TX- 228 PM CDT TUE AUG 19 2014 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL MONTGOMERY... NORTHWESTERN LIBERTY...SOUTH CENTRAL POLK AND SOUTHEASTERN SAN JACINTO COUNTIES UNTIL 315 PM CDT... AT 227 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER CLEVELAND...MOVING NORTHEAST AT 20 MPH. WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... CLEVELAND...SHEPHERD...NORTH CLEVELAND...ROMAYOR AND TARKINGTON PRAIRIE. PRECAUTIONARY/PREPAREDNESS ACTIONS... FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. && LAT...LON 3024 9502 3032 9520 3063 9507 3051 9479 TIME...MOT...LOC 1927Z 208DEG 19KT 3035 9507 40
Special weather statement, Aug 19, 3:06 PM CDT, 9 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 1:08 PM CDT | Special Weather Statement | HGX | Chambers | 67 min |
| Aug 19, 1:12 PM CDT | Special Weather Statement | HGX | Liberty | 63 min |
| Aug 19, 1:21 PM CDT | Special Marine Warning | HGX | 54 min | |
| Aug 19, 1:35 PM CDT | Special Weather Statement | HGX | Montgomery | 40 min |
| Aug 19, 1:40 PM CDT | Severe Thunderstorm Warning | HGX | Chambers, Harris, Liberty | 35 min |
| Aug 19, 1:54 PM CDT | Special Weather Statement | HGX | Liberty | 66 min |
| Aug 19, 1:56 PM CDT | Special Weather Statement | HGX | Polk | 64 min |
| Aug 19, 2:28 PM CDT | Special Weather Statement | HGX | San Jacinto | 47 min |
| Aug 19, 3:06 PM CDT | Special Weather Statement | HGX | Polk | 39 min |
| Aug 19, 3:34 PM CDT | Special Weather Statement | HGX | Polk | 41 min |
| Aug 19, 4:52 PM CDT | Special Weather Statement | HGX | Montgomery | 38 min |
| Aug 19, 5:03 PM CDT | Severe Thunderstorm Warning | HGX | Montgomery | 42 min |
| Aug 19, 5:46 PM CDT | Special Weather Statement | HGX | Madison | 44 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2014Every severe thunderstorm warning in 2014
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.