Hail, Grady
- When
- October 4, 6:51 PM CST
- Where
- Grady County, Tuttle
- Measured
- 1 in hail
- Reported by
- Public
- Coordinates
- 35.290, -97.810
Flash Flooding and Hail in Oklahoma, October 4 to 5, 2016
A line of storms extending down from Kansas into northern Oklahoma formed along a cold front on the evening of the 4th. These storms marched eastward acorss the state, and additional storms formed out ahead of the front later that evening.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 14
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What happened
The episode as NWS OUN wrote it up.
A line of storms extending down from Kansas into northern Oklahoma formed along a cold front on the evening of the 4th. These storms marched eastward acorss the state, and additional storms formed out ahead of the front later that evening.
What forecasters said that day
The local office's own words before the first event, 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 the first event at Oct 4, 5:23 PM CST, 1 hour 28 minutes earlier.
Area forecast discussion, Oct 4, 5:23 PM CST, 1 hour 28 minutes before
Area Forecast Discussion National Weather Service Norman OK 623 PM CDT TUE OCT 4 2016 .DISCUSSION... The 00Z aviation discussion follows.... && .AVIATION... Isolated strong/severe TSRA will continue until a few hours after sunset--mainly over north-central Oklahoma. Winds west of a dryline (located approximately KAVK-KCSM-KHBR-KLTS-F05 at 2300Z) will become generally light and variable after sunset. Elsewhere, 10-15 kt winds from the S-SE will continue through the period. Winds should be somewhat lighter on Wednesday. There will be another chance of TSRA tomorrow afternoon and evening (mainly in the general vicinity of I-44), but chances are currently too low to include in the TAFs. CmS && .PREV DISCUSSION... /issued 310 PM CDT TUE OCT 4 2016/ DISCUSSION... Isolated severe thunderstorms may develop along the dryline late this afternoon. Various convective-allowing models (HRRR/HRRRX/4KM NAM) are persistent in discrete supercells developing across southwest Oklahoma and moving northeastward into central Oklahoma. Analysis of the HRRR indicates localized backing/increased convergence along a dryline bulge could be a factor for convective iniation in the models. Visible satellite imagery indicates a possible perturbation/ascent across western north Texas/southwest Oklahoma which might be aiding in pressure falls/localized backing. There is some evidence of this perturbation on the 700 mb flow. Vertical wind shear will be more than sufficient for supercells with potential for large hail and damaging wind gusts. By around 00Z, low- level (0-1 km) vertical wind shear (~20 knots), MLLCLs (<1 km), and critical angles (~90 degrees) will result in sufficient environment for potential tornadogenesis with any supercells. Tomorrow, at least isolated showers/storms will be possible with a moist, conditionally unstable airmass still in place. Coverage/confidence for storms is low with no significant forcing. Coverage may increase overnight as isentropic ascent increases. By late Thursday into Thursday night, a seasonably strong cold front will progress from northwest to southeast across Oklahoma/western north Texas. Severe weather will be possible; however, because of linear forcing along the cold front, the primary hazards will be gusty winds and locally heavy rainfall. Lingering showers/storms will be possible Friday morning across southern Oklahoma/western north Texas. Much drier/cooler air is expected in the front's wake on Friday and Saturday. Many locations will drop into the 40Fs by Saturday morning, and with dew points dropping into the 30Fs and light winds, some locations across northwest Oklahoma may drop into the upper 30Fs. By Sunday, a shortwave trough may increase the chance of showers, especially northwest Oklahoma. The forecast becomes more uncertain beyond Sunday as the GFS and ECMWF become somewhat out of phase across the Southern Plains. However, a general pattern of quasi- zonal flow with embedded shortwaves suggests seasonable temperatures with at least a low chance of rain. Mahale && .PRELIMINARY POINT TEMPS/POPS... Oklahoma City OK 66 88 69 87 / 40 10 30 30 Hobart OK 57 88 68 87 / 10 10 20 30 Wichita Falls TX 67 92 69 90 / 20 10 30 20 Gage OK 49 86 58 87 / 0 0 10 30 Ponca City OK 63 89 69 87 / 60 10 40 40 Durant OK 71 89 69 88 / 20 10 20 10 && .OUN Watches/Warnings/Advisories... OK...None. TX...None. && 11/23/23
Hazardous weather outlook, Oct 4, 4:14 PM CST, 2 hours 37 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE NORMAN OK 514 PM CDT TUE OCT 4 2016 OKZ004>048-050>052-TXZ083>090-051200- 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- 514 PM CDT TUE OCT 4 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN... WESTERN...CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS. .DAY ONE...TONIGHT... .THUNDERSTORMS... THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS CENTRAL AND NORTH CENTRAL OKLAHOMA TONIGHT. LOCATION... THE SLIGHT RISK COVERS LOCATIONS THAT ARE ENCOMPASSED BY A LINE EXTENDING FROM CHEROKEE... TO EL RENO... TO CHICKASHA... TO ADA. THIS INCLUDES THE OKC METRO. TIMING... THE MOST LIKELY TIME FOR SEVERE STORMS WILL BE FROM THROUGH 3 AM. IMPACTS... THE MAIN IMPACTS WILL HAIL TO THE SIZE OF GOLF BALLS...DAMAGING WIND GUSTS TO 70 MPH AND FREQUENT CLOUD TO GROUND LIGHTNING. DISCUSSION... ISOLATED STRONG AND SEVERE THUNDERSTORMS WILL BE POSSIBLE OVERNIGHT... MAINLY ALONG AND EAST OF I-35. A BROKEN LINE OF STORMS CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WIND GUSTS WILL REMAIN POSSIBLE ACROSS NORTHERN INTO CENTRAL OKLAHOMA OVERNIGHT. .SPOTTER AND EMERGENCY MANAGEMENT INFORMATION STATEMENT... STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE RISK AREA SHOULD BE PREPARED FOR SEVERE WEATHER OPERATIONS THROUGH THIS EVENING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... .THUNDERSTORMS... STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE AGAIN ON THURSDAY. THE GREATEST RISK FOR SEVERE THUNDERSTORMS WILL BE ACROSS NORTHERN AND CENTRAL OKLAHOMA. THUNDERSTORMS WILL REMAIN POSSIBLE ACROSS AT LEAST PART OF THE AREA THROUGH SUNDAY. 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, Oct 4, 4:41 PM CST, 2 hours 10 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
541 PM CDT TUE OCT 4 2016
OKZ006-007-042315-
GRANT OK-ALFALFA OK-
541 PM CDT TUE OCT 4 2016
...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL GRANT AND CENTRAL
ALFALFA COUNTIES UNTIL 615 PM CDT...
AT 539 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR
CARMEN...MOVING NORTHEAST AT 35 MPH.
HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 50 MPH...
LOCATIONS IMPACTED INCLUDE...
CHEROKEE...CARMEN...JET...ALINE...
LAMBERT AND GREAT SALT PLAINS LAKE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.
&&
LAT...LON 3686 9805 3671 9800 3646 9848 3647 9853
3665 9854 3693 9821
TIME...MOT...LOC 2239Z 232DEG 31KT 3662 9845
MAHALESpecial weather statement, Oct 4, 5:14 PM CST, 1 hour 37 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
614 PM CDT TUE OCT 4 2016
OKZ006-007-042345-
GRANT OK-ALFALFA OK-
614 PM CDT TUE OCT 4 2016
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN GRANT AND
SOUTHEASTERN ALFALFA COUNTIES UNTIL 645 PM CDT...
AT 612 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES WEST OF
GREAT SALT PLAINS LAKE...MOVING NORTHEAST AT 35 MPH.
HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 40 MPH...
LOCATIONS IMPACTED INCLUDE...
CHEROKEE...WAKITA...JET...MANCHESTER AND GREAT SALT PLAINS LAKE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.
&&
LAT...LON 3694 9787 3681 9781 3658 9825 3672 9839
3700 9805 3700 9796
TIME...MOT...LOC 2312Z 232DEG 31KT 3671 9826
MAHALESpecial weather statement, Oct 4, 6:08 PM CST, 43 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
708 PM CDT TUE OCT 4 2016
OKZ006-007-011-012-050100-
GRANT OK-ALFALFA OK-MAJOR OK-GARFIELD OK-
708 PM CDT TUE OCT 4 2016
...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL GRANT...
SOUTHEASTERN ALFALFA...NORTHEASTERN MAJOR AND NORTHWESTERN GARFIELD
COUNTIES UNTIL 800 PM CDT...
AT 706 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR MENO...MOVING
EAST AT 25 MPH.
HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 50 MPH...
LOCATIONS IMPACTED INCLUDE...
ENID...LAHOMA...RINGWOOD...KREMLIN...MENO...HILLSDALE...CARRIER...
VANCE AIR FORCE BASE AND NORTH ENID.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.
&&
LAT...LON 3631 9831 3648 9824 3665 9789 3654 9780
3635 9781
TIME...MOT...LOC 0006Z 250DEG 21KT 3644 9816
MAHALEThe radar
The Norman radar (KTLX), 49 km away, was scanning. The volume nearest the first event began at 00:53 UTC.
Event by event
7 hail, 5 flash flood, 2 thunderstorm wind. Local standard time, as filed.
Hail, Grady
- When
- October 4, 7:02 PM CST
- Where
- Grady County, 1.32 mi WNW of Tuttle
- Measured
- 1.5 in hail
- Reported by
- Storm Chaser
- Coordinates
- 35.300, -97.830
Hail, Garfield
- When
- October 4, 7:29 PM CST
- Where
- Garfield County, Drummond
- Measured
- 1 in hail
- Reported by
- Emergency Manager
- Coordinates
- 36.300, -98.040
Flash Flood, Grant
- When
- October 4, 7:30 PM CST to 10:30 PM CST
- Where
- Grant County, 4.1 mi SSW of Renfrow to 2.37 mi SSW of Renfrow
- Cause
- Heavy Rain
- Reported by
- Law Enforcement
- Coordinates
- 36.870, -97.700
High water was reported flowing over highway 81. Time estimated.
Thunderstorm Wind, Garfield
- When
- October 4, 7:55 PM CST
- Where
- Garfield County, Waukomis
- Measured
- 61 kt (70 mph) measured gust
- Reported by
- Public
- Coordinates
- 36.280, -97.900
Measured at home station.
Thunderstorm Wind, Garfield
- When
- October 4, 7:56 PM CST
- Where
- Garfield County, 1.11 mi E of (End)vance Afb Enid
- Measured
- 60 kt (69 mph) measured gust
- Reported by
- AWOS
- Coordinates
- 36.340, -97.900
Flash Flood, Garfield
- When
- October 4, 8:07 PM CST to 11:07 PM CST
- Where
- Garfield County, 4.14 mi W of Waukomis to 0.86 mi SW of (End)vance Afb Enid
- Cause
- Heavy Rain
- Reported by
- Emergency Manager
- Coordinates
- 36.272, -97.974
An estimated 3.5 inches of rain fell causing water to flow over roadways at highway 132 and Hayward, Stabe road and Rupe, Imo and Skeleton, Wood and Imo, and Wheat capital and highway 132.
Flash Flood, Oklahoma
- When
- October 4, 8:18 PM CST to 11:18 PM CST
- Where
- Oklahoma County, Valley Brook to 1.1 mi ESE of Valley Brook
- Cause
- Heavy Rain
- Reported by
- Broadcast Media
- Coordinates
- 35.400, -97.480
I-240 and S. Eastern Ave were impassable due to flooding.
Hail, Oklahoma
- When
- October 4, 8:26 PM CST
- Where
- Oklahoma County, 3.06 mi SE of Edmond
- Measured
- 1.25 in hail
- Reported by
- Public
- Coordinates
- 35.620, -97.440
Flash Flood, Garfield
- When
- October 4, 8:35 PM CST to 11:35 PM CST
- Where
- Garfield County, Enid to 1.35 mi W of Enid
- Cause
- Heavy Rain
- Reported by
- Emergency Manager
- Coordinates
- 36.400, -97.880
Highways 81 and 412 were closed in town due to high water.
Hail, Oklahoma
- When
- October 4, 8:58 PM CST
- Where
- Oklahoma County, 3.06 mi NW of Luther
- Measured
- 1.75 in hail
- Reported by
- Fire Department/Rescue
- Coordinates
- 35.690, -97.230
Hail, Lincoln
- When
- October 4, 9:09 PM CST
- Where
- Lincoln County, 0.69 mi S of Jacktown
- Measured
- 1 in hail
- Reported by
- Emergency Manager
- Coordinates
- 35.500, -97.000
Flash Flood, Garfield
- When
- October 4, 9:45 PM CST to October 5, 12:45 AM CST
- Where
- Garfield County, 6.17 mi W of Douglas to 6.37 mi W of Douglas
- Cause
- Heavy Rain
- Reported by
- Emergency Manager
- Coordinates
- 36.259, -97.781
Water was over the road at 66th and Flynn Rd.
Hail, Pottawatomie
- When
- October 4, 11:14 PM CST
- Where
- Pottawatomie County, 1.13 mi E of Brooksville
- Measured
- 1 in hail
- Reported by
- Law Enforcement
- Coordinates
- 35.200, -96.950
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Hail and Heavy Rain in Nebraska, October 4, 2016
- Hail and Damaging Winds in Kansas, October 4, 2016
- Tornadoes and Hail in Kansas, October 4, 2016
- Flooding in Montana, October 4 to 15, 2016
- Hail and Damaging Wind in Nebraska, October 4, 2016
- Dense Fog in Virginia, October 4, 2016
- Dense Fog in West Virginia, October 4, 2016
- Winter Storm in Montana, October 4 to 5, 2016
- Hail and Damaging Winds in Oklahoma, October 4 to 5, 2016
- Drought in Georgia, October 4 to 31, 2016
- Drought in Alabama, October 4 to 31, 2016
- Coastal Flood in Puerto Rico, October 4 to 5, 2016
More
Every storm in Oklahoma in 2016Every state in 2016This day in weather historyWarnings in Oklahoma, October 2016
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 658600, 658601, 658602, 658605, 658606, 658607, 658616, 658618, 658619, 658620, 658622, 658623, 658628, 658629.