Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 560, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jul 6, 2015, 5:57 PM CDT for Alfalfa County, Grant County, Oklahoma. It was in force for 48 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 6, 2015, 5:57 PM CDT (22:57 UTC)
- Expired
- Jul 6, 2015, 6:45 PM CDT
- In force
- 48 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Alfalfa County, OK, Grant County, OK
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 11.0 hours before the alert went out and 181 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
- 482 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 852 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 184 m²/s²
- 0-3 km storm-relative helicity
- 183 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 6, 3:34 PM CDT, 2 hours 23 minutes earlier.
Area forecast discussion, Jul 6, 3:34 PM CDT, 2 hours 23 minutes before
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HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE NORMAN OK 320 PM CDT MON JUL 6 2015 OKZ004>048-050>052-TXZ083>090-072030- 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- 320 PM CDT MON JUL 6 2015 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 SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH THIS EVENING ACROSS PARTS OF NORTHERN AND WESTERN OKLAHOMA. LOCATION... THE SLIGHT RISK AREA IS GENERALLY ALONG AND SOUTH OF A LINE FROM ALVA AND WOODWARD... TO ARNETT AND THEN ALONG AND NORTH OF A LINE FROM HOLLIS AND HOBART... TO WEATHERFORD AND KINGFISHER... TO PERRY OKLAHOMA. THIS INCLUDES PONCA CITY...ENID AND CLINTON. SOUTH OF THE SLIGHT RISK AREA...A FEW STRONG TO MARGINALLY SEVERE STORMS ARE POSSIBLE...NORTH OF A SHAWNEE TO NORMAN...LAWTON AND VERNON TEXAS LINE. TIMING... THROUGH 11 PM. IMPACTS... DAMAGING WIND GUSTS UP TO 70 MPH... HAIL UP TO THE SIZE OF HALF DOLLARS... LOCALLY HEAVY RAINFALL WHICH MAY CAUSE FLASH FLOODING... DISCUSSION... SCATTERED TO NUMEROUS THUNDERSTORMS WILL DEVELOP ALONG A COLD FRONT IN NORTHERN AND WESTERN OKLAHOMA THIS AFTERNOON AND EVENING. ALTHOUGH WIND SHEAR WILL BE RATHER WEAK...ENOUGH INSTABILITY WILL BE AVAILABLE FOR STORMS TO PRODUCE DAMAGING WINDS AND SOME HAIL. THUNDERSTORMS WILL CONTINUE TO DEVELOP AND MOVE SOUTHWARD DURING THE OVERNIGHT HOURS WITH LOCALLY HEAVY RAINFALL POSSIBLE. .SPOTTER AND EMERGENCY MANAGEMENT STATEMENT... STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL WITHIN THE SLIGHT RISK AREA SHOULD BE READY FOR SEVERE WEATHER OPERATIONS THROUGH THIS EVENING. .FLOODING... A FLASH FLOOD WATCH IS IN EFFECT FROM LATE THIS AFTERNOON THROUGH LATE WEDNESDAY AFTERNOON FOR A LARGE PART OF OKLAHOMA AND WESTERN NORTH TEXAS. PLEASE REFER TO THE WATCH FOR DETAILS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY... .THUNDERSTORMS.... THUNDERSTORMS WILL CONTINUE TUESDAY INTO AT LEAST THURSDAY AS A COLD FRONT MOVES SLOWLY SOUTHWARD. HOT AND HUMID WEATHER WITH LITTLE OR NO RAIN IS EXPECTED FRIDAY THROUGH SUNDAY. .FLOODING.... FLOODING WILL REMAIN POSSIBLE TUESDAY INTO WEDNESDAY...ESPECIALLY ACROSS SOUTHWEST AND CENTRAL OKLAHOMA AND WESTERN NORTH TEXAS. 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 6, 3:21 PM CDT, 2 hours 36 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 321 PM CDT MON JUL 6 2015 OKZ009-014-062100- ROGER MILLS OK-ELLIS OK- 321 PM CDT MON JUL 6 2015 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN ROGER MILLS AND SOUTHEASTERN ELLIS COUNTIES UNTIL 400 PM CDT... AT 317 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 9 MILES NORTHEAST OF CRAWFORD...MOVING NORTHEAST AT 30 MPH. HAZARDS INCLUDE... WIND GUSTS TO 50 MPH... HAIL UP TO THE SIZE OF PEAS... HEAVY RAINFALL RESULTING IN POOR VISIBILITY... PRECAUTIONARY/PREPAREDNESS ACTIONS... MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING WEATHER CONDITIONS. && LAT...LON 3582 9983 3600 9986 3616 9939 3588 9938 TIME...MOT...LOC 2017Z 239DEG 28KT 3595 9972
Special weather statement, Jul 6, 4:15 PM CDT, 1 hour 42 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 6, 3:36 AM CDT | Flash Flood Watch | OUN | Alfalfa, Atoka, Beckham, Blaine, Bryan, Caddo and 41 more | 63 hr |
| Jul 6, 3:21 PM CDT | Special Weather Statement | OUN | Ellis | 39 min |
| Jul 6, 4:00 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Roger Mills | 28 min |
| Jul 6, 4:15 PM CDT | Special Weather Statement | OUN | Woodward | 45 min |
| Jul 6, 4:32 PM CDT | Special Weather Statement | OUN | Roger Mills | 28 min |
| Jul 6, 4:43 PM CDT | Special Weather Statement | OUN | Woods | 32 min |
| Jul 6, 5:17 PM CDT | Special Weather Statement | OUN | Woods | 43 min |
| Jul 6, 6:08 PM CDT | Special Weather Statement | OUN | Roger Mills | 37 min |
| Jul 6, 6:10 PM CDT | Special Weather Statement | OUN | Dewey | 35 min |
| Jul 6, 6:22 PM CDT | Special Weather Statement | OUN | Dewey, Roger Mills | 38 min |
| Jul 6, 6:24 PM CDT | Special Weather Statement | OUN | Kay | 36 min |
| Jul 6, 6:33 PM CDT | Areal Flood Advisory | OUN | Alfalfa, Garfield, Grant, Kay, Noble | 4 hr |
| Jul 6, 6:53 PM CDT | Areal Flood Advisory | OUN | Woods | 4 hr |
| Jul 6, 6:57 PM CDT | Special Weather Statement | OUN | Woods | 33 min |
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.