Alert archive / Oklahoma / Special Weather Statements in 2018
Special Weather Statement, NWS Tulsa, OK
NWS Tulsa, OK issued this special weather statement at Jul 20, 2018, 11:33 PM CDT for Ottawa County, Oklahoma. It was in force for 27 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 20, 2018, 11:33 PM CDT (04:33 UTC)
- Expired
- Jul 21, 2018, 12:00 AM CDT
- In force
- 27 min
- Issued by
- NWS Tulsa, OK
County Ottawa County, OK
The radar
The Springfield radar (KSGF), 116 km from the middle of the area, began a volume at 04:36 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
Springfield, MO (KSGF), launched 00:00Z, 4.6 hours before the alert went out and 76 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
- 69 J/kg
- Mixed-layer CIN
- -267 J/kg
- Mixed-layer LCL
- 2856 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- -60 m²/s²
- 0-3 km storm-relative helicity
- -32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
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</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 Tulsa, OK wrote its last area forecast discussion before this special weather statement went out at Jul 20, 8:37 PM CDT, 2 hours 56 minutes earlier.
Area forecast discussion, Jul 20, 8:37 PM CDT, 2 hours 56 minutes before
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<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.
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<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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</html>Hazardous weather outlook, Jul 20, 9:19 PM CDT, 2 hours 14 minutes before
Hazardous Weather Outlook National Weather Service Tulsa OK 919 PM CDT Fri Jul 20 2018 ARZ001-002-010-011-019-020-029-OKZ049-053>076-211030- 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- 919 PM CDT Fri Jul 20 2018 ...Dangerous Heat Continues Saturday... This Outlook is for Northwest and West Central Arkansas as well as much of Eastern Oklahoma. .DAY ONE...Tonight. SEVERE THUNDERSTORM. RISK...Limited. AREA...Far northeast Oklahoma and far northwest Arkansas. ONSET...Late evening. DISCUSSION... Isolated thunderstorms developing across southern Kansas will move southeast into northern Oklahoma and northwest Arkansas late this evening and overnight. Locally damaging wind gusts will be possible with the strongest of these storms. The risk of severe weather will diminish by early morning Saturday as instability weakens. SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT... Local Spotter Activation May Be Needed. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. SATURDAY and Sunday...Dangerous Heat Potential. MONDAY through Wednesday...No Hazards. THURSDAY...Thunderstorm Potential. EXTENDED DISCUSSION... A weak cold front will move south through eastern Oklahoma over the weekend gradually bringing an end to the prolonged excessive heat. Heat index values, however, will remain dangerously high across the lower Arkansas River Valley and far southeast Oklahoma Saturday and Sunday before drier and cooler air finally takes over. weather.gov/tulsa contains additional information.
In the hours before
Special weather statement, Jul 20, 11:33 PM CDT, 0 minutes before
Special Weather Statement National Weather Service Tulsa OK 1133 PM CDT FRI JUL 20 2018 OKZ058-210500- Ottawa OK- 1133 PM CDT FRI JUL 20 2018 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN OTTAWA COUNTY UNTIL MIDNIGHT CDT... At 1133 PM CDT, a strong thunderstorm was located 3 miles northeast of Baxter Springs, moving southeast at 45 mph. Nickel size hail will be possible with this storm. Locations in or near the path include... Baxter Springs... This includes Interstate 44 between mile markers 320 and 324. LAT...LON 3690 9462 3700 9477 3700 9462 TIME...MOT...LOC 0433Z 318DEG 39KT 3704 9468
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 11:48 PM CDT | Severe Thunderstorm Warning | TSA | Craig | 42 min |
| Jul 20, 11:49 PM CDT | Severe Thunderstorm Warning | TSA | Ottawa | 41 min |
| Jul 21, 1:37 AM CDT | Special Weather Statement | TSA | Delaware | 38 min |
| Jul 21, 1:52 AM CDT | Special Weather Statement | TSA | Mayes | 38 min |
| Jul 21, 2:04 AM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee, Delaware, Mayes | 27 min |
| Jul 21, 2:09 AM CDT | Severe Thunderstorm Warning | TSA | Delaware | 51 min |
| Jul 21, 2:39 AM CDT | Severe Thunderstorm Warning | TSA | Adair, Delaware, Mayes | 46 min |
| Jul 20, 11:43 PM CDT | Severe Thunderstorm Warning | TSA | Benton, Carroll | 47 min |
| Jul 21, 12:01 AM CDT | Special Weather Statement | TSA | Carroll | 29 min |
| Jul 21, 12:05 AM CDT | Severe Thunderstorm Warning | TSA | Benton, Madison, Washington | 40 min |
| Jul 21, 12:24 AM CDT | Special Weather Statement | TSA | Carroll | 21 min |
| Jul 21, 12:33 AM CDT | Severe Thunderstorm Warning | TSA | Crawford, Franklin, Madison, Washington | 42 min |
| Jul 21, 12:35 AM CDT | Special Weather Statement | TSA | Benton | 25 min |
| Jul 21, 12:59 AM CDT | Special Weather Statement | TSA | Madison | 31 min |
| Jul 21, 1:11 AM CDT | Severe Thunderstorm Warning | TSA | Franklin, Madison | 49 min |
| Jul 21, 1:30 AM CDT | Severe Thunderstorm Warning | TSA | Benton | 45 min |
| Jul 21, 1:40 AM CDT | Special Weather Statement | TSA | Madison | 35 min |
| Jul 21, 1:43 AM CDT | Special Weather Statement | TSA | Washington | 32 min |
| Jul 21, 1:50 AM CDT | Severe Thunderstorm Warning | TSA | Franklin, Madison, Washington | 40 min |
| Jul 21, 3:17 AM CDT | Special Weather Statement | TSA | Crawford, Franklin | 28 min |
Nearby
Special Weather Statements in Oklahoma, 2018Every special weather statement in 2018
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.