Alert archive / Texas / Flash Flood Warnings in 2022

Flash Flood Warning 6, NWS Houston/Galveston, TX

April 30, 2022Walker County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Apr 30, 2022, 10:41 PM CDT for Walker County, Texas. It was in force for 2 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: Apr 30, 2022, 10:41 PM CDT (03:41 UTC)
Expired: May 1, 2022, 12:45 AM CDT
In force: 2 hr
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon
Flood severity: None

County Walker County, TX

The radar

The Houston radar (KHGX), 149 km from the middle of the area, began a volume at 03:42 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.

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.

In the hours before

Special weather statement, Apr 30, 7:16 PM CDT, 3 hours 25 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>

Special weather statement, Apr 30, 7:34 PM CDT, 3 hours 7 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>

Special weather statement, Apr 30, 8:36 PM CDT, 2 hours 5 minutes before

Special Weather Statement
National Weather Service Houston/Galveston TX
836 PM CDT Sat Apr 30 2022

TXZ199-010215-
Montgomery TX-
836 PM CDT Sat Apr 30 2022

...Strong thunderstorms will impact portions of southeastern
Montgomery County through 915 PM CDT...

At 835 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles northwest of The Woodlands to Porter
Heights. Movement was east at 5 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...
Southern Conroe, The Woodlands, Oak Ridge North, Shenandoah,
Splendora, Patton Village, Roman Forest, Woodbranch, Woodloch, Porter
Heights, Chateau Woods and New Caney.

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.

If on or near Lake Conroe, get out of the water and move indoors or
inside a vehicle. Remember, lightning can strike out to 10 miles
from the parent thunderstorm. If you can hear thunder, you are close
enough to be struck by lightning. Move to safe shelter now! Do not
be caught on the water in a thunderstorm.

&&

LAT...LON 3030 9533 3026 9522 3016 9511 3011 9528
      3021 9562 3029 9566
TIME...MOT...LOC 0135Z 275DEG 4KT 3026 9555 3017 9531

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH

Special weather statement, Apr 30, 8:39 PM CDT, 2 hours 2 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, Apr 30, 9:19 PM CDT, 1 hour 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
919 PM CDT SAT APR 30 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0750 PM     HAIL             1 NW MADISONVILLE       30.96N 95.92W
04/30/2022  M1.50 INCH       MADISON            TX   PUBLIC

            PING-PONGBALL SIZED HAIL NEAR MADISONVILLE
            (FROM SOCIAL MEDIA).

0845 PM     HAIL             3 SW MADISONVILLE       30.92N 95.94W
04/30/2022  M1.50 INCH       MADISON            TX   PUBLIC

            GOLF TO PING-PONG BALL SIZED HAIL NEAR
            MADISONVILLE (FROM SOCIAL MEDIA).

&&

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 30, 7:01 PM CDT	Severe Thunderstorm Warning	HGX	Houston	59 min
Apr 30, 7:14 PM CDT	Severe Thunderstorm Warning	HGX	Houston, Madison	61 min
Apr 30, 7:16 PM CDT	Special Weather Statement	HGX	Montgomery	29 min
Apr 30, 7:28 PM CDT	Severe Thunderstorm Warning	HGX	Houston, Madison, Walker	32 min
Apr 30, 7:34 PM CDT	Special Weather Statement	HGX	Montgomery	26 min
Apr 30, 7:48 PM CDT	Severe Thunderstorm Warning	HGX	Harris, Montgomery	19 min
Apr 30, 7:53 PM CDT	Severe Thunderstorm Warning	HGX	Houston, Trinity	40 min
Apr 30, 8:13 PM CDT	Severe Thunderstorm Warning	HGX	Grimes, Madison, Walker	62 min
Apr 30, 8:36 PM CDT	Special Weather Statement	HGX	Montgomery	39 min
Apr 30, 8:39 PM CDT	Special Weather Statement	HGX	Houston, Trinity	66 min
Apr 30, 8:44 PM CDT	Areal Flood Advisory	HGX	Walker	61 min
Apr 30, 8:49 PM CDT	Areal Flood Advisory	HGX	Montgomery	56 min
Apr 30, 8:52 PM CDT	Areal Flood Advisory	HGX	Madison	3 hr
Apr 30, 9:00 PM CDT	Severe Thunderstorm Warning	HGX	Brazos, Grimes, Houston, Madison, Polk, San Jacinto and 2 more	30 min
Apr 30, 9:18 PM CDT	Areal Flood Advisory	HGX	Houston	57 min
Apr 30, 9:25 PM CDT	Severe Thunderstorm Warning	HGX	Brazos, Grimes, Madison, Montgomery, Polk, San Jacinto and 2 more	50 min
Apr 30, 9:52 PM CDT	Areal Flood Advisory	HGX	Grimes, Houston, Madison, Trinity, Walker	113 min
Apr 30, 10:09 PM CDT	Severe Thunderstorm Warning	HGX	Grimes, Montgomery, San Jacinto, Walker	51 min
Apr 30, 10:20 PM CDT	Severe Thunderstorm Warning	HGX	Montgomery, Walker	40 min
Apr 30, 11:01 PM CDT	Areal Flood Advisory	HGX	Brazos, Grimes, Montgomery, Walker	3 hr
Apr 30, 11:05 PM CDT	Special Weather Statement	HGX	Montgomery	55 min
Apr 30, 11:39 PM CDT	Special Weather Statement	HGX	Montgomery	51 min
May 1, 12:30 AM CDT	Special Weather Statement	HGX	Montgomery	30 min
May 1, 12:54 AM CDT	Special Weather Statement	HGX	Grimes	36 min
May 1, 1:31 AM CDT	Special Weather Statement	HGX	Grimes	59 min
May 1, 1:52 AM CDT	Areal Flood Advisory	HGX	Brazos, Grimes	3 hr
May 1, 3:09 PM CDT	Special Weather Statement	HGX	Montgomery	36 min
May 1, 3:33 PM CDT	Severe Thunderstorm Warning	HGX	Montgomery, San Jacinto, Walker	27 min
May 1, 3:57 PM CDT	Severe Thunderstorm Warning	HGX	Montgomery, San Jacinto, Walker	33 min

Nearby

Flash Flood Warnings in Texas, 2022 Every 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; radar from the NEXRAD Level II archive.