Alert archive / Alabama / Special Weather Statements in 2016

Special Weather Statement, NWS Birmingham, AL

July 30, 2016Jefferson County, Alabama

NWS Birmingham, AL issued this special weather statement at Jul 30, 2016, 11:50 AM CDT for Jefferson County, Alabama. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 30, 2016, 11:50 AM CDT (16:50 UTC)
Expired: Jul 30, 2016, 12:30 PM CDT
In force: 40 min
Issued by: NWS Birmingham, AL

County Jefferson County, AL

The radar

The Birmingham radar (KBMX), 80 km from the middle of the area, began a volume at 16:50 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, 4.8 hours before the alert went out and 78 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: 872 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 934 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

As transmitted.

<!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>

What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Birmingham, AL wrote its last area forecast discussion before this special weather statement went out at Jul 30, 10:55 AM CDT, 55 minutes earlier.

Area forecast discussion, Jul 30, 10:55 AM CDT, 55 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>

Hazardous weather outlook, Jul 30, 3:59 AM CDT, 7 hours 51 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
359 AM CDT SAT JUL 30 2016

ALZ011>015-017>050-311200-
MARION-LAMAR-FAYETTE-WINSTON-WALKER-BLOUNT-ETOWAH-CALHOUN-CHEROKEE-
CLEBURNE-PICKENS-TUSCALOOSA-JEFFERSON-SHELBY-ST. CLAIR-TALLADEGA-
CLAY-RANDOLPH-SUMTER-GREENE-HALE-PERRY-BIBB-CHILTON-COOSA-TALLAPOOSA-
CHAMBERS-MARENGO-DALLAS-AUTAUGA-LOWNDES-ELMORE-MONTGOMERY-MACON-
BULLOCK-LEE-RUSSELL-PIKE-BARBOUR-
359 AM CDT SAT JUL 30 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...OUTLOOK THROUGH TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT IS NOT
EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Jul 30, 11:14 AM CDT, 36 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, Jul 30, 11:50 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1150 AM CDT SAT JUL 30 2016

ALZ015-017-024-301730-
WALKER AL-BLOUNT AL-JEFFERSON AL-
1150 AM CDT SAT JUL 30 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BLOUNT...
NORTHEASTERN WALKER AND NORTH CENTRAL JEFFERSON COUNTIES UNTIL 1230
PM CDT...

AT 1150 AM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
OVER LYNNS PARK...OR NEAR CORDOVA...MOVING EAST AT 20 MPH.

PEA SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
JASPER...GARDENDALE...SUMITON...CORDOVA...DORA...WARRIOR...
KIMBERLY...MORRIS...TRAFFORD...HAYDEN...SIPSEY...COUNTY LINE...
BLOUNT SPRINGS...ROCKY HOLLOW...BELOIT...ARKADELPHIA...LYNNS PARK...
SAYRE...POWELLVILLE AND SMOKE RISE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3367 8676 3375 8724 3393 8722 3393 8710
      3392 8708 3390 8710 3389 8709 3389 8701
      3387 8700 3386 8696 3387 8696 3386 8695
      3387 8695 3387 8692 3391 8692 3392 8689
      3394 8688 3394 8673
TIME...MOT...LOC 1650Z 274DEG 19KT 3384 8715

32/DAVIS

The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 29, 8:45 PM CDT	Areal Flood Advisory	BMX	Calhoun, St. Clair	2 hr
Jul 30, 11:14 AM CDT	Special Weather Statement	BMX	Winston	31 min
Jul 30, 12:27 PM CDT	Special Weather Statement	BMX	Jefferson	48 min
Jul 30, 12:38 PM CDT	Special Weather Statement	BMX	Blount	52 min
Jul 30, 1:20 PM CDT	Special Weather Statement	BMX	Lamar	40 min
Jul 30, 1:31 PM CDT	Areal Flood Advisory	BMX	Walker	3 hr
Jul 30, 1:42 PM CDT	Special Weather Statement	BMX	Talladega	48 min
Jul 30, 2:13 PM CDT	Special Weather Statement	BMX	Clay	47 min
Jul 30, 3:05 PM CDT	Special Weather Statement	BMX	Cleburne	40 min
Jul 30, 3:32 PM CDT	Special Weather Statement	BMX	Chambers	28 min
Jul 30, 3:54 PM CDT	Special Weather Statement	BMX	Greene	36 min
Jul 30, 5:05 PM CDT	Areal Flood Advisory	BMX	Hale, Marengo, Sumter	115 min
Jul 30, 5:13 PM CDT	Special Weather Statement	BMX	Macon	62 min
Jul 30, 5:28 PM CDT	Special Weather Statement	BMX	Russell	62 min
Jul 30, 5:53 PM CDT	Areal Flood Advisory	BMX	Barbour, Russell	112 min
Jul 30, 6:17 PM CDT	Special Weather Statement	BMX	Dallas	43 min

Nearby

Special Weather Statements in Alabama, 2016 Every special weather statement in 2016

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.