Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 588, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jul 30, 2020, 4:56 AM CDT for 7 counties in Oklahoma. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 30, 2020, 4:56 AM CDT (09:56 UTC)
- Expired
- Jul 30, 2020, 5:45 AM CDT
- In force
- 49 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Garfield County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Logan County, OK, Noble County, OK, Payne County, OK
The radar
The Vance AFB radar (KVNX), 74 km from the middle of the area, began a volume at 09:58 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
Norman, OK (KOUN), launched 00:00Z, 9.9 hours before the alert went out and 124 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
- 1768 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 1314 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 195 m²/s²
- 0-3 km storm-relative helicity
- 202 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 8.4
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 30, 4:49 AM CDT, 7 minutes earlier.
Area forecast discussion, Jul 30, 4:49 AM CDT, 7 minutes before
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</html>Hazardous weather outlook, Jul 29, 9:42 PM CDT, 7 hours 14 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Norman OK 942 PM CDT Wed Jul 29 2020 OKZ004>048-050>052-TXZ083>090-301130- Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield- Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne- Beckham-Washita-Caddo-Canadian-Oklahoma-Lincoln-Grady-McClain- Cleveland-Pottawatomie-Seminole-Hughes-Harmon-Greer-Kiowa-Jackson- Tillman-Comanche-Stephens-Garvin-Murray-Pontotoc-Coal-Cotton- Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan-Hardeman- Foard-Wilbarger-Wichita-Knox-Baylor-Archer-Clay- 942 PM CDT Wed Jul 29 2020 This hazardous weather outlook is for portions of northern... western...central...and southern Oklahoma...and western north Texas. .DAY ONE...Through tonight... .Thunderstorms... There is a risk of strong to severe thunderstorms across the northern third of Oklahoma. The stronger storms will produce wind gusts near 60 mph and locally heavy rainfall. Some hail is also possible. The most likely time for severe storms will be from the mid evening through about 2 am. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday... .Thunderstorms... Thunderstorm chances will continue through late Friday with the highest chances Thursday night into Friday morning. Strong to severe storms will be possible Thursday afternoon into the overnight hours Thursday night, with damaging winds, large hail and locally heavy rain the main concerns. Most of Saturday and Sunday will be dry, but thunderstorm chances will increase Sunday night through Monday morning. Get graphics and more details at weather.gov/norman...and follow our weather forecast office on Twitter and Facebook.
In the hours before
Special weather statement, Jul 30, 2:37 AM CDT, 2 hours 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 237 AM CDT Thu Jul 30 2020 OKZ004-300815- Harper OK- 237 AM CDT Thu Jul 30 2020 ...SIGNIFICANT WEATHER ADVISORY FOR northwestern Harper County Until 315 AM CDT... AT 235 AM CDT, a strong thunderstorm was located 7 miles northeast of Gate, moving east at 20 MPH. HAZARDS INCLUDE... Hail up to the size of nickels... Wind gusts to 50 MPH... LAT...LON 3700 9953 3679 9955 3681 10000 3700 10000 TIME...MOT...LOC 0735Z 270DEG 19KT 3693 9997 ..speg.
Special weather statement, Jul 30, 3:18 AM CDT, 1 hour 38 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 318 AM CDT Thu Jul 30 2020 OKZ004-005-010-300845- Woodward OK-Harper OK-Woods OK- 318 AM CDT Thu Jul 30 2020 ...SIGNIFICANT WEATHER ADVISORY FOR north central Woodward...Harper and northern Woods Counties Until 345 AM CDT... AT 317 AM CDT, strong thunderstorms were along a line extending from 10 miles south of Buttermilk to near Laverne, moving east at 50 MPH. HAZARDS INCLUDE... Hail up to one-half inch diameter... Wind gusts to 50 MPH... LAT...LON 3699 9856 3662 9932 3665 10000 3700 10000 TIME...MOT...LOC 0817Z 273DEG 42KT 3696 9932 3674 9988 ..speg.
Special weather statement, Jul 30, 3:57 AM CDT, 59 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
357 AM CDT Thu Jul 30 2020
OKZ005>007-012-300930-
Garfield OK-Alfalfa OK-Woods OK-Grant OK-
357 AM CDT Thu Jul 30 2020
...SIGNIFICANT WEATHER ADVISORY FOR northwestern Garfield...
Alfalfa...Woods and Grant Counties Until 430 AM CDT...
AT 353 AM CDT, the leading edge of strong and gusty thunderstorm
winds extended along a line extending from near Manchester to 7
miles east of Waynoka, moving east at 60 MPH. The strong winds will
approach before the thunderstorms themselves.
HAZARDS INCLUDE...
Wind gusts to 50 MPH...
LAT...LON 3700 9746 3675 9746 3651 9788 3656 9895
3700 9930
TIME...MOT...LOC 0853Z 273DEG 52KT 3694 9803 3657 9875
..speg.Local storm report, Jul 30, 4:14 AM CDT, 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
414 AM CDT THU JUL 30 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0405 AM TSTM WND GST 1 SSW CHEROKEE 36.74N 98.36W
07/30/2020 M57 MPH ALFALFA OK MESONET
&&
JPIKELocal storm report, Jul 30, 4:35 AM CDT, 21 minutes before
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</html>Local storm report, Jul 30, 4:42 AM CDT, 14 minutes before
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</html>The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 8:49 PM CDT | Special Weather Statement | OUN | Harper | 26 min |
| Jul 29, 9:15 PM CDT | Special Weather Statement | OUN | Harper | 30 min |
| Jul 29, 9:45 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Woods, Woodward | 45 min |
| Jul 29, 10:23 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Woods | 36 min |
| Jul 29, 10:36 PM CDT | Special Weather Statement | OUN | Alfalfa | 24 min |
| Jul 29, 11:51 PM CDT | Special Weather Statement | OUN | Grant, Kay, Noble | 24 min |
| Jul 30, 12:15 AM CDT | Special Weather Statement | OUN | Kay, Noble | 30 min |
| Jul 30, 1:53 AM CDT | Special Weather Statement | OUN | Payne | 37 min |
| Jul 30, 2:37 AM CDT | Special Weather Statement | OUN | Harper | 38 min |
| Jul 30, 3:18 AM CDT | Special Weather Statement | OUN | Harper | 27 min |
| Jul 30, 3:57 AM CDT | Special Weather Statement | OUN | Alfalfa, Grant, Woods | 33 min |
| Jul 30, 4:14 AM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Garfield, Grant | 46 min |
| Jul 30, 4:38 AM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Blaine, Garfield, Kingfisher, Major | 37 min |
| Jul 30, 5:46 AM CDT | Special Weather Statement | OUN | Lincoln, Logan, Oklahoma, Payne | 29 min |
| Jul 30, 6:15 AM CDT | Special Weather Statement | OUN | Lincoln, Oklahoma | 30 min |
| Jul 30, 6:48 AM CDT | Areal Flood Advisory | OUN | Kay | 3 hr |
| Jul 30, 3:23 PM CDT | Special Weather Statement | OUN | Washita | 22 min |
| Jul 30, 4:18 PM CDT | Special Weather Statement | OUN | Kiowa | 27 min |
| Jul 30, 4:22 PM CDT | Severe Thunderstorm Warning | OUN | Greer, Jackson, Kiowa | 23 min |
| Jul 30, 4:28 PM CDT | Severe Thunderstorm Warning | OUN | Kiowa | 17 min |
| Jul 30, 4:43 PM CDT | Special Weather Statement | OUN | Hughes | 17 min |
| Jul 30, 4:48 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Greer, Jackson, Kiowa, Tillman | 42 min |
| Jul 30, 4:51 PM CDT | Special Weather Statement | OUN | Grady | 24 min |
| Jul 30, 5:00 PM CDT | Special Weather Statement | OUN | Tillman | 15 min |
| Jul 30, 5:03 PM CDT | Special Weather Statement | OUN | Coal | 27 min |
| Jul 30, 5:07 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Grady, Stephens | 38 min |
| Jul 30, 5:28 PM CDT | Severe Thunderstorm Warning | OUN | Coal, Hughes | 32 min |
| Jul 30, 5:29 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Tillman | 46 min |
| Jul 30, 5:35 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, McClain | 40 min |
| Jul 30, 5:40 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Stephens | 50 min |
| Jul 30, 5:43 PM CDT | Special Weather Statement | OUN | McClain | 17 min |
| Jul 30, 6:07 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Garvin, Grady, McClain, Stephens | 23 min |
| Jul 30, 6:14 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Jefferson, Stephens, Tillman | 16 min |
| Jul 30, 6:19 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Coal, Pontotoc | 26 min |
| Jul 30, 6:27 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Cotton, Garvin, Jefferson, Johnston, Love and 4 more | 48 min |
| Jul 30, 6:30 PM CDT | Areal Flood Advisory | OUN | Coal, Hughes | 3 hr |
| Jul 30, 6:31 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Tillman | 44 min |
| Jul 30, 6:36 PM CDT | Special Weather Statement | OUN | Pontotoc | 24 min |
| Jul 30, 6:52 PM CDT | Special Weather Statement | OUN | Ellis | 23 min |
| Jul 30, 6:56 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Coal, Hughes, Johnston, Pontotoc | 19 min |
| Jul 30, 4:06 PM CDT | Special Weather Statement | OUN | Wilbarger | 24 min |
| Jul 30, 4:14 PM CDT | Severe Thunderstorm Warning | OUN | Wilbarger | 31 min |
| Jul 30, 4:25 PM CDT | Severe Thunderstorm Warning | OUN | Foard | 20 min |
| Jul 30, 4:39 PM CDT | Severe Thunderstorm Warning | OUN | Wilbarger | 51 min |
| Jul 30, 4:41 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Knox | 49 min |
| Jul 30, 5:26 PM CDT | Severe Thunderstorm Warning | OUN | Archer, Baylor, Wichita, Wilbarger | 49 min |
| Jul 30, 5:33 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Foard, Hardeman, Wilbarger | 27 min |
| Jul 30, 5:45 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Wilbarger | 30 min |
| Jul 30, 5:54 PM CDT | Special Weather Statement | OUN | Knox | 36 min |
| Jul 30, 6:10 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Hardeman, Wilbarger | 39 min |
| Jul 30, 6:41 PM CDT | Special Weather Statement | OUN | Wichita | 34 min |
| Jul 30, 6:55 PM CDT | Special Weather Statement | OUN | Baylor | 35 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2020Every severe thunderstorm 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.