Alert archive / Oklahoma / Areal Flood Advisories in 2021
Areal Flood Advisory 18, NWS Tulsa, OK
NWS Tulsa, OK issued this areal flood advisory at May 16, 2021, 11:41 PM CDT for Osage County, Oklahoma. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- May 16, 2021, 11:41 PM CDT (04:41 UTC)
- Expired
- May 17, 2021, 3:30 AM CDT
- In force
- 4 hr
- Issued by
- NWS Tulsa, OK
- Area
- Storm-based polygon
County Osage County, OK
The radar
The Tulsa radar (KINX), 90 km from the middle of the area, began a volume at 04:44 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
Topeka, KS (KTOP), launched 00:00Z, 4.7 hours before the alert went out and 272 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
- 128 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 632 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tulsa, OK wrote its last area forecast discussion before this areal flood advisory went out at May 16, 9:15 PM CDT, 2 hours 26 minutes earlier.
Area forecast discussion, May 16, 9:15 PM CDT, 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>Hazardous weather outlook, May 16, 4:56 PM CDT, 6 hours 45 minutes before
Hazardous Weather Outlook National Weather Service Tulsa OK 456 PM CDT Sun May 16 2021 ARZ001-002-010-011-019-020-029-OKZ049-053>076-171000- Adair OK-Benton AR-Carroll AR-Cherokee OK-Choctaw OK-Craig OK- Crawford AR-Creek OK-Delaware OK-Franklin AR-Haskell OK-Latimer OK- Le Flore OK-Madison AR-Mayes OK-McIntosh OK-Muskogee OK-Nowata OK- Okfuskee OK-Okmulgee OK-Osage OK-Ottawa OK-Pawnee OK-Pittsburg OK- Pushmataha OK-Rogers OK-Sebastian AR-Sequoyah OK-Tulsa OK-Wagoner OK- Washington OK-Washington AR- 456 PM CDT Sun May 16 2021 This Outlook is for Northwest and West Central Arkansas as well as much of Eastern Oklahoma. .DAY ONE...This Evening and Tonight. SEVERE THUNDERSTORM. RISK...Limited. AREA...Eastern Oklahoma and Northwest Arkansas. ONSET...Ongoing. HEAVY RAIN. RISK...Limited. AREA...Mainly Eastern Oklahoma. ONSET...Ongoing. DISCUSSION... Showers and scattered thunderstorms will continue to track east and northeast across eastern Oklahoma and into northwest Arkansas through the remainder of the afternoon and evening. A few strong to briefly severe storms will be possible during this time frame, but no organized severe weather is expected. Locally heavy rainfall will be possible, especially across eastern Oklahoma, and some localized flooding may occur. Additional storms are likely to develop overnight with both heavy rainfall and limited severe weather potential. SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT... Local Spotter Activation May Be Needed. .DAYS TWO THROUGH SEVEN...Monday through Saturday. MONDAY through WEDNESDAY...Thunderstorm Potential...Heavy Rain Potential. THURSDAY through SATURDAY...Thunderstorm Potential. EXTENDED DISCUSSION... A few showers and thunderstorms may still be ongoing early Monday morning with a continued risk of heavy rainfall. A brief lull in rain chances is forecast later Monday, with the next round of widespread rains expected Monday night through Tuesday. The repeated widespread rain periods will allow heavy rainfall accumulations, and both flash flooding and mainstem river flooding may become a hazard. The unsettled weather pattern is likely to extend into late next week. Heavy rainfall and flooding potential will remain the primary concern. EMERGENCY MANAGEMENT PLANNING STATEMENT... Flood watches and warnings may be required with updated forecasts. Areal flooding, including larger river flooding, should be anticipated especially across parts of southeast and also far northeast Oklahoma. weather.gov/tulsa contains additional information.
In the hours before
Special weather statement, May 16, 6:35 PM CDT, 5 hours 6 minutes before
Special Weather Statement
National Weather Service Tulsa OK
635 PM CDT Sun May 16 2021
OKZ067-068-170015-
Cherokee OK-Wagoner OK-
635 PM CDT Sun May 16 2021
...SIGNIFICANT WEATHER ADVISORY FOR WAGONER AND NORTHWESTERN CHEROKEE
COUNTIES UNTIL 715 PM CDT...
At 633 PM CDT, gusty southeast winds behind a band of showers and
thunderstorms were observed across parts of Wagoner and Cherokee
counties.
Winds of 40 to 50 mph will be possible through 715 pm.
Locations in or near the path include...
Wagoner... Coweta...
Okay... Porter...
Tullahassee... Sequoyah State Park...
Redbird...
LAT...LON 3611 9557 3609 9555 3608 9556 3608 9558
3607 9557 3607 9513 3582 9525 3589 9572
3611 9559
TIME...MOT...LOC 2333Z 239DEG 49KT 3595 9540The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 3:20 AM CDT | Flood Watch | TSA | Choctaw, Latimer, Pittsburg, Pushmataha | 66 hr |
| May 17, 5:48 AM CDT | River Flood Warning | TSA | Osage | 7 hr |
| May 17, 3:45 PM CDT | Special Weather Statement | TSA | Cherokee | 15 min |
| May 17, 5:48 PM CDT | Special Weather Statement | TSA | Sequoyah | 27 min |
| May 17, 6:30 PM CDT | Special Weather Statement | TSA | Delaware | 30 min |
Nearby
Areal Flood Advisories in Oklahoma, 2021Every areal flood advisory in 2021
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.