Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 585, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Aug 18, 2015, 6:20 PM CDT for Kay County, Oklahoma. It was in force for 25 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
- Aug 18, 2015, 6:20 PM CDT (23:20 UTC)
- Expired
- Aug 18, 2015, 6:45 PM CDT
- In force
- 25 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Kay County, OK
The radar
The Vance AFB radar (KVNX), 88 km from the middle of the area, began a volume at 23:20 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 18, 3:06 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 11.3 hours before the alert went out and 179 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
- 390 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 1314 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -51 m²/s²
- 0-3 km storm-relative helicity
- -14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
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 Aug 18, 3:21 PM CDT, 2 hours 59 minutes earlier.
Area forecast discussion, Aug 18, 3:21 PM CDT, 2 hours 59 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORMAN OK 321 PM CDT TUE AUG 18 2015 .DISCUSSION... MAIN IMPACTS WILL BE STRONG COLD FRONT AND CONVECTION NEXT COUPLE OF DAYS. STRONG FRONT ENTERING NORTHWEST OKLAHOMA THIS AFTN WILL BE AN INITIAL FOCUS FOR SCATTERED THUNDERSTORM DEVELOPMENT LATE TODAY INTO THIS EVENING. MODEST INSTABILITY AND WIND SHEAR WILL ALLOW FOR THE POSSIBILITY FOR A FEW STRONG TO SEVERE STORMS... MAINLY TONIGHT ACROSS NORTHERN OKLAHOMA. CONVECTION IS EXPECTED BECOME MORE WIDESPREAD OVERNIGHT AND THROUGH MUCH OF THE DAY ON WEDNESDAY BEHIND THE FRONT. THIS PRECIP... ASSOCIATED CLOUD COVER AND DRIER/COOLER AIR BEHIND FRONT WILL LEAD TO A VERY COOL DAY FOR AUGUST. HIGHS ON WED EXPECTED TO BE SOME 20 TO 25 DEGREES BELOW NORMAL WITH SOME LOCATIONS NOT GETTING OUT OF THE 60S. THIS WILL ALSO LEAD TO A VERY COOL MORNING THURSDAY BEFORE WE GET A MODEST WARM UP INTO THE WEEKEND. MODELS ARE SHOWING A WEAKER SYSTEM AND SOME WEAK WAA DEVELOPING THURSDAY NIGHT INTO FRIDAY THAT MAY RESULT IN A FEW SHOWERS AND THUNDERSTORMS. BY THE WEEKEND A STORM SYSTEM DRAGS ANOTHER COLD FRONT SOUTH INTO THE SOUTHERN PLAINS GIVING THE AREA ADDITIONAL RAIN CHANCES AND KEEPING THE TEMPS AT OR BELOW NORMAL. UPPER RIDGE THEN TRIES TO MAKE A RETURN FOR NEXT WEEK WITH DRIER AND WARMER WEATHER. && .PRELIMINARY POINT TEMPS/POPS... OKLAHOMA CITY OK 64 72 56 82 / 70 70 10 0 HOBART OK 65 76 56 84 / 60 40 10 0 WICHITA FALLS TX 72 81 61 86 / 40 40 30 10 GAGE OK 59 77 54 83 / 60 30 0 0 PONCA CITY OK 62 74 54 84 / 70 60 0 0 DURANT OK 75 83 62 82 / 30 70 50 20 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...NONE. TX...NONE. && 09/30
Hazardous weather outlook, Aug 18, 3:21 PM CDT, 2 hours 59 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE NORMAN OK 321 PM CDT TUE AUG 18 2015 OKZ004>048-050>052-TXZ083>090-192030- 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- 321 PM CDT TUE AUG 18 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN... WESTERN...CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS. .DAY ONE...TODAY AND TONIGHT... .THUNDERSTORMS... THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS LATE THIS AFTERNOON AND TONIGHT ACROSS PORTIONS OF WESTERN...CENTRAL...AND NORTHERN OKLAHOMA. LOCATION... THE SLIGHT RISK AREA IS NORTH AND WEST OF A LINE FROM WOODWARD TO CAMARGO TO KINGFISHER TO STILLWATER. TIMING... ALTHOUGH A FEW SEVERE THUNDERSTORMS WILL BE POSSIBLE AFTER 4 PM THIS AFTERNOON IN NORTHWEST OKLAHOMA...MORE NUMEROUS THUNDERSTORMS ARE EXPECTED FROM 6 PM UNTIL MIDNIGHT. IMPACTS... HAIL UP TO THE SIZE OF GOLF BALLS AND WIND GUSTS UP TO 70 MPH ARE EXPECTED WITH THE SEVERE STORMS. DISCUSSION... A COLD FRONT WILL MOVE INTO NORTHWESTERN OKLAHOMA LATE THIS AFTERNOON. A FEW SEVERE STORMS MAY DEVELOP ALONG THIS FRONT BEFORE 6 PM...BUT THE MAIN ACTIVITY WILL HAPPEN LATER TONIGHT AS THE FRONT MOVES THROUGH THE NORTHERN HALF OF OKLAHOMA. LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN THREATS ALTHOUGH LOCALLY HEAVY RAINFALL MAY ALSO RESULT IN FLASH FLOODING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... .THUNDERSTORMS... SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE ACROSS MUCH OF THE REGION WEDNESDAY...AND AGAIN THIS WEEKEND. THE HIGHEST CHANCES FOR THUNDERSTORMS WILL BE DURING THE DAY WEDNESDAY ACROSS CENTRAL AND SOUTHERN OKLAHOMA. LOCALLY HEAVY RAINFALL AND A FEW STRONG WIND GUSTS WILL BE POSSIBLE DURING THE DAY WEDNESDAY. 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, Aug 18, 5:01 PM CDT, 1 hour 19 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
501 PM CDT TUE AUG 18 2015
OKZ008-182230-
KAY OK-
501 PM CDT TUE AUG 18 2015
...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL KAY COUNTY UNTIL 530
PM CDT...
AT 459 PM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER KAW LAKE...
MOVING EAST AT 30 MPH.
HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 40 MPH...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.
&&
LAT...LON 3678 9675 3678 9679 3677 9679 3677 9682
3675 9682 3674 9683 3674 9685 3675 9687
3675 9689 3670 9693 3684 9699 3695 9675
TIME...MOT...LOC 2159Z 250DEG 27KT 3679 9687
30Special weather statement, Aug 18, 5:39 PM CDT, 41 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
539 PM CDT TUE AUG 18 2015
OKZ008-182315-
KAY OK-
539 PM CDT TUE AUG 18 2015
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN KAY COUNTY UNTIL 615
PM CDT...
AT 536 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 6 MILES NORTHWEST
OF MARLAND...MOVING EAST AT 30 MPH.
HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 40 MPH...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.
&&
LAT...LON 3683 9696 3674 9690 3668 9693 3669 9702
3670 9704 3668 9706 3666 9706 3664 9705
3661 9705 3660 9704 3659 9706 3659 9723
3667 9729
TIME...MOT...LOC 2236Z 250DEG 27KT 3664 9720
30Special weather statement, Aug 18, 5:48 PM CDT, 32 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 548 PM CDT TUE AUG 18 2015 OKZ016-182315- CUSTER OK- 548 PM CDT TUE AUG 18 2015 ...SIGNIFICANT WEATHER ADVISORY FOR WESTERN CUSTER COUNTY UNTIL 615 PM CDT... AT 547 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR BUTLER... MOVING EAST AT 20 MPH. HAZARDS INCLUDE... HAIL UP TO ONE-HALF INCH DIAMETER... WIND GUSTS TO 40 MPH... MINOR FLOODING IN AREAS OF POOR DRAINAGE... THIS INCLUDES INTERSTATE 40 NEAR MILE MARKER 68. PRECAUTIONARY/PREPAREDNESS ACTIONS... MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING WEATHER CONDITIONS. && LAT...LON 3554 9931 3572 9931 3577 9893 3550 9892 TIME...MOT...LOC 2247Z 268DEG 17KT 3563 9923 30
Special weather statement, Aug 18, 6:12 PM CDT, 8 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 612 PM CDT TUE AUG 18 2015 OKZ012-018-019-182345- LOGAN OK-KINGFISHER OK-GARFIELD OK- 612 PM CDT TUE AUG 18 2015 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN LOGAN...NORTHEASTERN KINGFISHER AND SOUTHEASTERN GARFIELD COUNTIES UNTIL 645 PM CDT... AT 611 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 5 MILES EAST OF HENNESSEY...MOVING EAST AT 30 MPH. HAZARDS INCLUDE... HAIL UP TO ONE-HALF INCH DIAMETER... WIND GUSTS TO 40 MPH... PRECAUTIONARY/PREPAREDNESS ACTIONS... MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING WEATHER CONDITIONS. && LAT...LON 3605 9786 3619 9789 3625 9758 3604 9752 TIME...MOT...LOC 2311Z 261DEG 25KT 3613 9780 30
Special weather statement, Aug 18, 6:17 PM CDT, 3 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
617 PM CDT TUE AUG 18 2015
OKZ008-182345-
KAY OK-
617 PM CDT TUE AUG 18 2015
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN KAY COUNTY UNTIL 645
PM CDT...
AT 615 PM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER PONCA CITY...
MOVING EAST AT 30 MPH.
HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 40 MPH...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.
&&
LAT...LON 3678 9676 3678 9679 3677 9679 3677 9682
3674 9683 3675 9687 3675 9689 3668 9693
3670 9704 3668 9706 3660 9705 3660 9714
3678 9717 3687 9675
TIME...MOT...LOC 2315Z 261DEG 25KT 3671 9707
30The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 9:55 PM CDT | Special Weather Statement | OUN | Harper | 35 min |
| Aug 18, 2:37 AM CDT | Special Weather Statement | OUN | Woods | 38 min |
| Aug 18, 2:56 AM CDT | Special Weather Statement | OUN | Alfalfa, Grant | 34 min |
| Aug 18, 5:01 PM CDT | Special Weather Statement | OUN | Kay | 29 min |
| Aug 18, 5:39 PM CDT | Special Weather Statement | OUN | Kay | 36 min |
| Aug 18, 5:48 PM CDT | Special Weather Statement | OUN | Custer | 27 min |
| Aug 18, 6:03 PM CDT | Severe Thunderstorm Warning | OUN | Custer | 42 min |
| Aug 18, 6:12 PM CDT | Special Weather Statement | OUN | Garfield | 33 min |
| Aug 18, 6:17 PM CDT | Special Weather Statement | OUN | Kay | 28 min |
| Aug 18, 6:56 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Washita | 36 min |
| Aug 18, 6:58 PM CDT | Areal Flood Advisory | OUN | Kay | 4 hr |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2015Every severe thunderstorm warning in 2015
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.