Alert archive / Alabama / Flash Flood Warnings in 2022

Flash Flood Warning 19, NWS Huntsville, AL

June 7, 2022Marshall County, Alabama

NWS Huntsville, AL issued this flash flood warning at Jun 7, 2022, 5:59 PM CDT for Marshall County, Alabama. 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: Jun 7, 2022, 5:59 PM CDT (22:59 UTC)
Expired: Jun 7, 2022, 9:00 PM CDT
In force: 3 hr
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Flood severity: None

County Marshall County, AL

The radar

The Northeast Alabama radar (KHTX), 66 km from the middle of the area, began a volume at 22:58 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

Birmingham, AL (KBMX), launched 12:00Z, 11.0 hours before the alert went out and 139 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 989 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 752 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.1

Open this sounding in Storm Lab

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 Huntsville, AL wrote its last area forecast discussion before this flash flood warning went out at Jun 7, 1:07 PM CDT, 4 hours 52 minutes earlier.

Area forecast discussion, Jun 7, 1:07 PM CDT, 4 hours 52 minutes before

Area Forecast Discussion
National Weather Service Huntsville AL
107 PM CDT Tue Jun 7 2022

...New NEAR TERM, SHORT TERM, LONG TERM...

.NEAR TERM...
(Tonight)
Issued at 106 PM CDT Tue Jun 7 2022

Convective clusters will continue to develop through tonight along
a weak low level west-east boundary. Buoyancy is plenty sufficient
(SBCAPES of 3000-3500 j/kg) given dew points in the lower 70s.
Loss of heating may decrease this a bit, but a nocturnal increase
in the west-southwest LLJ may occur late tonight as an MCV from
the current MCS in AR arrives. Locally heavy rainfall due to
inflow PWs of 1.6+ inches and possible echo training. Will have to
monitor flash flood potential more closely. Will hold off on a
Flood Watch for now, but will advise next shift to watch closely.

&&

.SHORT TERM...
(Wednesday through Friday night)
Issued at 106 PM CDT Tue Jun 7 2022

As the MCV shifts southeast early Wed morning, there may be a
waning period in convective intensity. However, persistent south-
southwest low level flow will increase in advance of the next MCS
which will arrive during the midday into the afternoon hours. The
models are in some disagreement on the track of the centroid of
the MCS (GFS further north and NAM further south). Either way,
PoPs will be likely to categorical, with a gusty to damaging wind
threat expected, along with locally excessive rainfall.

The models continue to advertise a break in the activity Wednesday
night through Thursday night with high pressure at the surface
pushing through KY/TN and north AL.

The active west-northwest flow pattern will dig another shortwave
southeast with a cold front Friday into Friday evening. Storm
relative inflow will increase rapidly Friday despite surface low
level flow remaining somewhat minimal. PWs will remain in the
1.5-1.8 inch range at least. However, the big question is
instability. The low level Theta-E and instability gradient will
reside from northeast AR through west central AL by Friday
afternoon. Thus, the risk of strong to severe storms may be
greatest just to our southwest, but it will be close. Either way,
PoPs will be in the high chance to likely range through Friday
evening.

&&

.LONG TERM...
(Saturday through Monday)
Issued at 106 PM CDT Tue Jun 7 2022

After lingering showers end early Saturday, a dry and cooler
weekend is anticipated. At least the odds are in favor of that.
The northwest flow pattern may still bring MCS activity across AR
into MS which will be close Sunday to our southwest. Deep layer
ridging should build quickly Monday however. Highs will go from
the upper 70s to lower 80s Saturday, to the 80s Sunday, to upper
80s to lower 90s Monday. So definitely a shift to summer weather
rather quickly. Will keep Monday dry for now, but the GFS brings a
"ridge rider" wave and possible thunderstorms south from the
eastern corn belt through the TN valley Monday.

&&

.AVIATION...
(18Z TAFS)
Issued at 1121 AM CDT Tue Jun 7 2022

Clusters of SHRA and TSRA will be persistent through the period.
However, exact timing and location remain somewhat uncertain.
Therefore have carried VCSH or VCTS throughout the period.
Ceilings may dip into the MVFR category (below 030agl) at times,
but should be VFR most of the period. Gusty winds and +RA are
possible in and near TSRA.

&&

.HUN WATCHES/WARNINGS/ADVISORIES...
AL...None.
TN...None.
&&

NEAR TERM...17
SHORT TERM....17
LONG TERM....17
AVIATION...17

Hazardous weather outlook, Jun 7, 5:10 PM CDT, 49 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, Jun 7, 4:41 PM CDT, 1 hour 18 minutes before

Special Weather Statement
National Weather Service Huntsville AL
441 PM CDT Tue Jun 7 2022

ALZ006>009-072230-
Marshall AL-Madison AL-Morgan AL-Jackson AL-
441 PM CDT Tue Jun 7 2022

...A strong thunderstorm will impact portions of west central
Jackson, northern Marshall, southern Madison and northeastern Morgan
Counties through 530 PM CDT...

At 441 PM CDT, Doppler radar was tracking a strong thunderstorm over
southeastern Huntsville, moving east at 20 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...
Southern Huntsville, Redstone Arsenal, Owens Cross Roads, Grant,
Gurley, Woodville, Paint Rock, Farley, Trenton and Garth.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3447 8653 3464 8671 3476 8625 3448 8615
TIME...MOT...LOC 2141Z 262DEG 16KT 3460 8651

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH

GH

Special weather statement, Jun 7, 5:40 PM CDT, 19 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, Jun 7, 5:45 PM CDT, 14 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, Jun 7, 5:46 PM CDT, 13 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, Jun 7, 5:47 PM CDT, 12 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, Jun 7, 5:50 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 Huntsville, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 7, 1:37 AM CDT	Special Weather Statement	HUN	Cullman	38 min
Jun 7, 8:17 AM CDT	Special Weather Statement	HUN	Madison	28 min
Jun 7, 8:52 AM CDT	Special Weather Statement	HUN	Madison	38 min
Jun 7, 9:24 AM CDT	Special Weather Statement	HUN	Jackson	36 min
Jun 7, 12:37 PM CDT	Special Weather Statement	HUN	Madison	38 min
Jun 7, 2:38 PM CDT	Special Weather Statement	HUN	Madison	52 min
Jun 7, 3:27 PM CDT	Special Weather Statement	HUN	Jackson	48 min
Jun 7, 4:41 PM CDT	Special Weather Statement	HUN	Madison	49 min
Jun 7, 4:59 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison, Marshall	46 min
Jun 7, 5:35 PM CDT	Flash Flood Warning	HUN	Jackson, Limestone, Madison, Marshall, Morgan	4 hr
Jun 7, 5:40 PM CDT	Special Weather Statement	HUN	Jackson	50 min
Jun 7, 5:50 PM CDT	Special Weather Statement	HUN	Lawrence	40 min
Jun 7, 1:15 AM CDT	Special Weather Statement	HUN	Franklin	45 min
Jun 7, 3:56 AM CDT	Special Weather Statement	HUN	Moore	34 min
Jun 7, 2:16 PM CDT	Special Weather Statement	HUN	Moore	29 min
Jun 7, 2:34 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Moore	41 min
Jun 7, 3:02 PM CDT	Severe Thunderstorm Warning	HUN	Franklin	28 min
Jun 7, 3:04 PM CDT	Special Weather Statement	HUN	Moore	41 min
Jun 7, 3:28 PM CDT	Flash Flood Warning	HUN	Franklin, Lincoln, Moore	2 hr

Nearby

Flash Flood Warnings in Alabama, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.