Alert archive / Texas / Flash Flood Warnings in 2022
Flash Flood Warning 15, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at Dec 30, 2022, 1:03 AM CST for Brazoria County, Galveston County, Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 30, 2022, 1:03 AM CST (07:03 UTC)
- Expired
- Dec 30, 2022, 4:00 AM CST
- In force
- 3 hr
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Brazoria County, TX, Galveston County, TX
The radar
The Houston radar (KHGX), 27 km from the middle of the area, began a volume at 07:04 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 00:00Z, 7.1 hours before the alert went out and 210 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
- 309 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 778 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 202 m²/s²
- 0-3 km storm-relative helicity
- 209 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.5
What forecasters said that day
The local office's own words before this flash flood 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 flash flood warning went out at Dec 29, 11:47 PM CST, 1 hour 16 minutes earlier.
Area forecast discussion, Dec 29, 11:47 PM CST, 1 hour 16 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>In the hours before
Special weather statement, Dec 29, 7:43 PM CST, 5 hours 20 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
743 PM CST Thu Dec 29 2022
TXZ163-176-177-196>199-300215-
Madison TX-Walker TX-Brazos TX-Washington TX-Grimes TX-Montgomery TX-
Houston TX-
743 PM CST Thu Dec 29 2022
...Strong thunderstorms will impact portions of Grimes, southeastern
Brazos, northeastern Washington, northwestern Montgomery,
southwestern Houston, Madison and west central Walker Counties
through 815 PM CST...
At 745 PM CST, Doppler radar was tracking strong thunderstorms along
a line extending from 10 miles southwest of Centerville to near
Bedias to Washington. Movement was northeast at 25 mph.
HAZARD...Winds in excess of 30 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Navasota, Madisonville, Washington, Bedias, Anderson, Roans Prairie,
Richards and Carlos.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
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.
&&
LAT...LON 3094 9572 3039 9584 3022 9624 3077 9603
3104 9610 3107 9605 3107 9601 3109 9598
3109 9577 3114 9577
TIME...MOT...LOC 0142Z 214DEG 24KT 3113 9607 3083 9599 3034 9618
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH
KWSpecial weather statement, Dec 29, 8:13 PM CST, 4 hours 50 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
813 PM CST Thu Dec 29 2022
TXZ163-176-177-196>199-212-213-300245-
Madison TX-Walker TX-Brazos TX-Washington TX-Waller TX-Grimes TX-
Inland Harris TX-Montgomery TX-Houston TX-
813 PM CST Thu Dec 29 2022
...Strong thunderstorms will impact portions of Grimes, southeastern
Brazos, northeastern Washington, northwestern Montgomery,
southwestern Houston, Madison, northern Waller, southwestern Walker
and northwestern Harris Counties through 845 PM CST...
At 811 PM CST, Doppler radar was tracking strong thunderstorms along
a line extending from 11 miles north of Madisonville to 6 miles
northwest of Hempstead. Movement was east at 20 mph.
HAZARD...Winds in excess of 30 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Navasota, Madisonville, Austonio, Washington, Bedias, Millican,
Anderson, Todd Mission, Iola, North Zulch, Dacus, Plantersville,
Roans Prairie, Richards and Carlos.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
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.
&&
LAT...LON 3127 9556 3012 9587 3015 9630 3104 9610
3109 9598 3109 9577 3114 9577 3116 9573
3118 9575 3121 9574
TIME...MOT...LOC 0211Z 249DEG 18KT 3111 9586 3017 9614
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH
KWSpecial weather statement, Dec 29, 8:50 PM CST, 4 hours 13 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
850 PM CST Thu Dec 29 2022
TXZ163-164-176-177-196>199-210>213-300315-
Madison TX-Walker TX-Brazos TX-Washington TX-Waller TX-Grimes TX-
Colorado TX-Inland Harris TX-Montgomery TX-Houston TX-Austin TX-
Trinity TX-
850 PM CST Thu Dec 29 2022
...Strong thunderstorms will impact portions of west central Trinity,
northeastern Colorado, northeastern Austin, Grimes, southeastern
Brazos, eastern Washington, northwestern Montgomery, Houston, eastern
Madison, Waller, Walker and northwestern Harris Counties through 915
PM CST...
At 850 PM CST, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles southwest of Crockett to near
Hempstead. Movement was east at 30 mph.
HAZARD...Winds in excess of 30 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Huntsville, Navasota, Crockett, Hempstead, Prairie View,
Madisonville, Bellville, Austonio, Washington, Trinity, Waller,
Grapeland, Pine Island, Lovelady, Montgomery, Bedias, Kennard,
Latexo, Millican and Anderson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
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.
&&
LAT...LON 3158 9517 3153 9511 3147 9510 3147 9507
2995 9593 2961 9657 3109 9592 3109 9577
3114 9577 3116 9573 3121 9575 3123 9573
3127 9573 3132 9566 3145 9571 3146 9575
3147 9572 3150 9574 3154 9565 3159 9528
TIME...MOT...LOC 0250Z 276DEG 25KT 3123 9552 3011 9617
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH
KWLocal storm report, Dec 29, 10:37 PM CST, 2 hours 26 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>Local storm report, Dec 29, 11:13 PM CST, 1 hour 50 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>Local storm report, Dec 30, 12:47 AM CST, 16 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 |
|---|---|---|---|---|
| Dec 29, 6:32 PM CST | Special Marine Warning | HGX | 28 min | |
| Dec 29, 6:38 PM CST | Special Weather Statement | HGX | Brazos, Washington | 37 min |
| Dec 29, 6:58 PM CST | Special Marine Warning | HGX | 32 min | |
| Dec 29, 7:14 PM CST | Special Marine Warning | HGX | 16 min | |
| Dec 29, 7:20 PM CST | Special Weather Statement | HGX | Grimes, Madison | 25 min |
| Dec 29, 7:31 PM CST | Special Marine Warning | HGX | 29 min | |
| Dec 29, 7:43 PM CST | Special Weather Statement | HGX | Grimes, Madison | 32 min |
| Dec 29, 7:53 PM CST | Special Marine Warning | HGX | 37 min | |
| Dec 29, 8:13 PM CST | Special Weather Statement | HGX | Grimes, Madison | 32 min |
| Dec 29, 8:31 PM CST | Areal Flood Advisory | HGX | Brazoria, Galveston | 119 min |
| Dec 29, 8:34 PM CST | Special Marine Warning | HGX | 26 min | |
| Dec 29, 8:50 PM CST | Special Weather Statement | HGX | Austin, Grimes, Houston, Madison, Walker, Waller | 25 min |
| Dec 29, 8:59 PM CST | Special Marine Warning | HGX | 31 min | |
| Dec 29, 9:28 PM CST | Special Marine Warning | HGX | 32 min | |
| Dec 29, 9:42 PM CST | Tornado Warning | HGX | Galveston | 33 min |
| Dec 29, 10:02 PM CST | Special Marine Warning | HGX | 28 min | |
| Dec 29, 10:10 PM CST | Severe Thunderstorm Warning | HGX | Chambers, Galveston | 20 min |
| Dec 29, 10:18 PM CST | Special Marine Warning | HGX | 27 min | |
| Dec 29, 10:19 PM CST | Special Marine Warning | HGX | 26 min | |
| Dec 29, 10:21 PM CST | Special Marine Warning | HGX | 24 min | |
| Dec 29, 10:25 PM CST | Severe Thunderstorm Warning | HGX | Chambers, Galveston | 20 min |
| Dec 29, 10:26 PM CST | Areal Flood Advisory | HGX | Brazoria, Galveston | 109 min |
| Dec 29, 10:36 PM CST | Special Marine Warning | HGX | 24 min | |
| Dec 29, 10:38 PM CST | Special Marine Warning | HGX | 37 min | |
| Dec 29, 10:59 PM CST | Special Marine Warning | HGX | 31 min | |
| Dec 29, 11:03 PM CST | Flash Flood Warning | HGX | Brazoria, Galveston | 117 min |
| Dec 29, 11:26 PM CST | Areal Flood Advisory | HGX | Austin, Colorado, Waller, Washington | 2 hr |
| Dec 29, 11:30 PM CST | Special Marine Warning | HGX | 30 min | |
| Dec 29, 11:34 PM CST | Special Marine Warning | HGX | 26 min | |
| Dec 29, 11:55 PM CST | Special Marine Warning | HGX | 35 min | |
| Dec 29, 11:58 PM CST | Special Marine Warning | HGX | 32 min | |
| Dec 30, 12:28 AM CST | Special Marine Warning | HGX | 47 min | |
| Dec 30, 12:34 AM CST | Areal Flood Advisory | HGX | Chambers, Liberty | 3 hr |
| Dec 30, 12:38 AM CST | Areal Flood Advisory | HGX | Brazoria, Galveston | 3 hr |
| Dec 30, 12:38 AM CST | Special Marine Warning | HGX | 37 min | |
| Dec 30, 1:13 AM CST | Special Marine Warning | HGX | 32 min | |
| Dec 30, 1:17 AM CST | Severe Thunderstorm Warning | HGX | Chambers, Liberty | 28 min |
| Dec 30, 1:44 AM CST | Severe Thunderstorm Warning | HGX | Chambers, Liberty | 31 min |
| Dec 30, 2:01 AM CST | Special Marine Warning | HGX | 44 min |
Nearby
Flash Flood Warnings in Texas, 2022Every flash flood warning in 2022
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.