Alert archive / Alabama / River Flood Warnings in 2020

River Flood Warning 104, NWS Birmingham, AL

September 15, 2020Elmore County, Montgomery County, Alabama

NWS Birmingham, AL issued this river flood warning at Sep 15, 2020, 11:56 AM CDT for Elmore County, Montgomery County, Alabama. It took effect at Sep 17, 2020, 1:51 PM CDT. It was in force for 20 hr.

The area

The counties it named.

The facts

Issued: Sep 15, 2020, 11:56 AM CDT (16:56 UTC)
In effect from: Sep 17, 2020, 1:51 PM CDT
Expired: Sep 18, 2020, 9:55 AM CDT
In force: 20 hr
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Flood severity: Moderate

Counties Elmore County, AL, Montgomery County, AL

The radar

The Maxwell AFB radar (KMXX), 39 km from the middle of the area, began a volume at 16:56 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 river

Written for the forecast point Tallapoosa River at Tallapoosa Water Plant (MGYA1).

Action stage: 15 ft
Minor stage: 25 ft
Moderate stage: 32 ft
Major stage: 38 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 02419890, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood warning 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 river flood warning went out at Sep 15, 6:34 AM CDT, 5 hours 22 minutes earlier.

Area forecast discussion, Sep 15, 6:34 AM CDT, 5 hours 22 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, Sep 15, 7:13 AM CDT, 4 hours 43 minutes before

Hazardous Weather Outlook
National Weather Service Birmingham AL
713 AM CDT Tue Sep 15 2020

ALZ011>015-017>050-161515-
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-
713 AM CDT Tue Sep 15 2020

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...Wednesday through Monday.

The latest forecast regarding Tropical Storm Sally brings the system
through Central Alabama Wednesday and Thursday. At this time, the
storm will mainly impact areas along and south of I-59. However, all
residents across Central Alabama are encouraged to stay up to date
with the latest forecast information from the National Weather
Service.

Four to eight inches of rain can be expected for areas south of I-20
through Thursday with locally higher amounts.  Around three inches
if forecast along the I-20 corridor, tapering off to less than one
inch across the northwest counties. There is a threat of flash
and areal flooding Wednesday and Thursday for areas along and south
of I-20.

Breezy conditions can be expected through Wednesday night. Gusts up
to 35 mph could occur Wednesday afternoon and evening along and south
of a Selma, to Montgomery, to Auburn line.

There is also a threat for isolated, short-lived tornadoes Wednesday
afternoon and evening. The tornado threat will be confined to areas
along and south of I-85.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management will likely be
needed Wednesday and Thursday. Please follow all local, state, and
CDC guidelines in regards to travel.

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 15, 11:52 AM CDT	River Flood Warning	BMX	Autauga, Dallas, Elmore, Lowndes, Montgomery	4 days
Sep 15, 11:55 AM CDT	River Flood Warning	BMX	Montgomery	3 days
Sep 15, 3:37 PM CDT	Wind Advisory	BMX	Autauga, Barbour, Bibb, Bullock, Chambers, Chilton and 15 more	35 hr

Nearby

River Flood Warnings in Alabama, 2020 Every river flood warning in 2020

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; the gauge from the NWS water service and the USGS.