Hail, Greer
- When
- April 16, 11:40 AM CST
- Where
- Greer County, Mangum
- Measured
- 0.75 in hail
- Reported by
- Amateur Radio
- Coordinates
- 34.880, -99.500
Hail in Oklahoma, April 16, 2009
Showers and thunderstorms developed during the morning hours over western Oklahoma and parts of northern Texas, ahead of a dry line that moved into western Oklahoma during the afternoon. A few of these thunderstorms became severe, mainly over Greer and Caddo counties.
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
- 2
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.
Showers and thunderstorms developed during the morning hours over western Oklahoma and parts of northern Texas, ahead of a dry line that moved into western Oklahoma during the afternoon. A few of these thunderstorms became severe, mainly over Greer and Caddo counties. Marginally severe hail was reported with the thunderstorms, with no damage reported.
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 Apr 16, 8:50 AM CST, 2 hours 50 minutes earlier.
Area forecast discussion, Apr 16, 8:50 AM CST, 2 hours 50 minutes before
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE NORMAN OK 950 AM CDT THU APR 16 2009 .UPDATE... SHOWERS/STORMS DEVELOPING IN WESTERN PORTIONS OF FA THIS MORNING. SHOWERS/STORMS WILL CONTINUE TO DEVELOP AND WITH STEEP LAPSE RATES /PER AMA 12Z SOUNDING/ SOME OF THE STORMS MAY BECOME STRONG. AN ISOLATED SEVERE STORM CAN ALSO NOT BE COMPLETELY RULED OUT...WITH LARGE HAIL THE MAIN CONCERN. HOWEVER... MAIN SEVERE WX CHANCES WILL STILL BE THIS EVENING/TONIGHT. BEST CHANCES FOR RAIN WILL REMAIN IN WESTERN PORTIONS OF CWA TODAY AND SPREAD EAST OVERNIGHT. HAVE RAISED HIGHS A FEW DEGREES FOR APPROX THE EASTERN HALF OF FA. MOSTLY CLEAR SKIES IN THIS AREA HAVE LED TO GOOD HEATING. CLOUDS WILL INCREASE THROUGHOUT THE DAY WHICH WILL SLOW DOWN THE HEATING THIS AFTN. FURTHER WEST...MOSTLY CLOUDY/CLOUDY SKIES HAVE ALREADY DEVELOPED SO COOLEST TEMPS WILL BE SEEN IN THIS AREA. HAVE ALSO MADE MINOR ADJUSTMENTS TO HOURLY GRIDS TO SHOW CURRENT TRENDS. WILL SEND UPDATES SHORTLY. MAXWELL && .PREV DISCUSSION... /ISSUED 600 AM CDT THU APR 16 2009/ AVIATION... EXPECT MVFR CEILINGS TO DEVELOP THIS MORNING...ESPECIALLY ACROSS WESTERN OK SITES. THE LOW CLOUDS WILL DEVELOP FARTHER EAST DURING AFTN HOURS. AS THIS OCCURS WILL WILL SEE CONVECTION DEVELOP ACROSS THE WEST AND PERHAPS PUSH TOWARD I-35 CORRIDOR AROUND SUNSET. ADDITIONAL CONVECTION EXPECTED TO DEVELOP DURING THE EVENING ACROSS WEST TX AND THEN MOVE EAST AFFECTING MOST SITES DURING LAST 6 HRS OF FORECAST... WITH THUNDER/IFR CEILINGS AND MVFR VISIBILITIES. 30 PREV DISCUSSION... /ISSUED 339 AM CDT THU APR 16 2009/ DISCUSSION... LARGE UPPER LOW CONT TO MAKE SLOW EASTWARD PROGRESS THROUGH SOUTHERN ROCKIES THIS MORNING. AS IT DOES SO WILL SEE AN INCREASE IN PRECIP CHANCES TODAY THROUGH FRIDAY. SOME WAA GOING ON THIS MORNING COULD RESULT IN A FEW SHWRS AND PERHAPS AN ISOLATED THUNDERSTORM. HOWEVER BETTER OPPORTUNITY FOR CONVECTION OCCURS THIS AFTN ACROSS WESTERN SECTIONS OF OK SOUTHWARD INTO WESTERN NORTH TEXAS ALONG AND EAST OF DRYLINE. STILL APPEARS THAT A LARGE COMPLEX OF STORMS WILL DEVELOP TO OUR WEST AND SOUTHWEST THIS EVENING AND OVERNIGHT AND THEN PUSH EAST INTO THE AREA DURING THE DAY ON FRI. DRY SLOT WILL THEN WILL INTO AREA BRINGING AN END TO THE MORE SIGNIFICANT RAINFALL. MUCH OF THE AREA SHOULD SEE ON THE ORDER OF AN INCH OF RAIN WITH SOME LOCATIONS POSSIBLY GETTING MORE THAN 2 INCHES. UPPER LOW WILL MAKE ITS WAY ACROSS NORTHERN OK ON SAT WITH SFC COLD FRONT MOVING SOUTH ACROSS THE AREA LATE SATURDAY AND SAT NIGHT. WILL MAINTAIN SOME LOW POPS ACROSS MAINLY NORTH INTO EAST SAT INTO SUN WITH WRAP AROUND SHOWERS. OTHERWISE COOLER TEMPS EXPECTED FOR THE SECOND HALF OF THE WEEKEND INTO EARLY NEXT WEEK BEFORE UPPER RIDGE BUILDS EAST OUT INTO THE PLAINS AND WARMER TEMPS RETURN. && .PRELIMINARY POINT TEMPS/POPS... OKLAHOMA CITY OK 71 54 62 51 / 40 60 80 40 HOBART OK 69 53 67 46 / 70 80 70 20 WICHITA FALLS TX 70 56 71 49 / 70 80 60 20 GAGE OK 68 48 63 43 / 70 80 80 30 PONCA CITY OK 71 52 63 52 / 20 40 80 70 DURANT OK 72 57 67 54 / 30 50 80 40 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...NONE. TX...NONE. && 25/06
Hazardous weather outlook, Apr 16, 10:49 AM CST, 51 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1149 AM CDT THU APR 16 2009
OKZ004>048-050>052-TXZ083>090-171200-
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-
1149 AM CDT THU APR 16 2009
THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.
.DAY ONE...THIS AFTERNOON AND TONIGHT...
THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH TONIGHT
ACROSS ALL OF WESTERN NORTH TEXAS AND MUCH OF WESTERN OKLAHOMA.
LOCATION...
THE SLIGHT RISK AREA IS WEST OF A LINE FROM ALVA... TO WATONGA... TO
LAWTON AND WAURIKA.
TIMING...
AN ISOLATED SEVERE STORM WILL BE POSSIBLE THROUGHOUT THE AFTERNOON
HOURS. HOWEVER... THE GREATEST SEVERE WEATHER POTENTIAL WILL BE FROM
EARLY THIS EVENING THROUGH THE OVERNIGHT HOURS.
RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREA SHOULD PLAN FOR POSSIBLE SEVERE WEATHER OPERATIONS FROM
THIS AFTERNOON UNTIL EARLY FRIDAY MORNING.
DISCUSSION...
THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS PORTIONS OF WESTERN
OKLAHOMA AND WESTERN NORTH TEXAS THIS AFTERNOON. SOME OF THE STORMS
MAY BECOME STRONG PRODUCING SMALL HAIL. HOWEVER... AN ISOLATED
SEVERE STORM ALSO CAN NOT BE RULED OUT. IF A SEVERE THUNDERSTORM
DEVELOPS... LARGE HAIL TO THE SIZE OF QUARTERS WILL BE THE MAIN
CONCERN.
A STRONG UPPER LEVEL STORM SYSTEM OVER THE FOUR CORNERS REGION WILL
CONTINUE TO MOVE SLOWLY EAST THROUGH TONIGHT. SOUTH TO SOUTHEASTERLY
WINDS AT LOW LEVELS WILL CONTINUE TO BRING LOW-LEVEL MOISTURE FROM
THE GULF INTO THE SOUTHERN PLAINS. THE DRY LINE WILL STRENGTHEN AND
MOVE EAST TO CENTRAL PARTS OF THE OKLAHOMA AND TEXAS PANHANDLES
SOUTHWARD BY LATE THIS AFTERNOON.
THE SLOW INCREASE IN LOW-LEVEL MOISTURE WILL RESULT IN ONLY WEAK TO
MODERATE INSTABILITY BY LATE TODAY NEAR THE DRY LINE. WINDS ALOFT
WILL STRENGTHEN IN RESPONSE TO THE SLOW APPROACH OF THE UPPER
SYSTEM... RESULTING IN VERTICAL SHEAR THAT WILL BE FAVORABLE FOR
ORGANIZED SEVERE THUNDERSTORMS. STORMS ARE LIKELY TO INITIATE
DURING THE MID TO LATE AFTERNOON HOURS NEAR AND EAST OF THE DRY
LINE... OVER THE CENTRAL AND SOUTHERN HIGH PLAINS. LATER THIS
EVENING AND OVERNIGHT... INDIVIDUAL STORMS MAY MERGE INTO ONE OR
MORE LINES OR COMPLEXES... AND ADVANCE EAST INTO WESTERN OKLAHOMA
AND WESTERN NORTH TEXAS. LARGE HAIL AND DAMAGING WINDS WILL BE THE
MAIN CONCERNS. LOCALLY HEAVY RAIN ALSO WILL BE POSSIBLE.
PROBABILITY TABLE...
VALID THROUGH 700 AM CDT FRIDAY APR 17.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...50 PERCENT.
OTHER HAZARDOUS WEATHER...
NONE.
.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...
THUNDERSTORM OUTLOOK...
THE RISK OF SEVERE THUNDERSTORMS WILL CONTINUE INTO FRIDAY AND
SATURDAY. THE GREATEST RISK WILL BE FRIDAY AFTERNOON OVER WESTERN
OKLAHOMA... CLOSER TO THE CENTER OF THE UPPER STORM SYSTEM. COLD AIR
ALOFT IN THESE AREAS WILL RESULT IN A HIGHER POTENTIAL FOR LARGE
HAIL. ALTHOUGH INSTABILITY WILL BE WEAKER FARTHER EAST... VERTICAL
WIND SHEAR IN THE LOWER LEVELS ALSO WILL SUPPORT STORMS WITH
LOW-LEVEL ROTATION... AND POSSIBLY A FEW TORNADOES... IN WESTERN AND
CENTRAL OKLAHOMA AND WESTERN NORTH TEXAS.
OTHER HAZARDOUS WEATHER...
NONE.
THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 7 AM
FRIDAY.
MAXWELLIn the hours before
Special weather statement, Apr 16, 10:03 AM CST, 1 hour 37 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 1103 AM CDT THU APR 16 2009 OKZ009-014-161630- ROGER MILLS OK-ELLIS OK- 1103 AM CDT THU APR 16 2009 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR ELLIS AND ROGER MILLS COUNTIES. AT 1102 AM...STRONG THUNDERSTORMS WERE LOCATED ABOUT 4 MILES WEST OF REYDON AND 10 MILES SOUTHWEST OF ARNETT. THE STORMS WERE MOVING NORTH AROUND 30 MPH. SMALL HAIL AND BRIEF HEAVY RAINFALL CAN BE EXPECTED WITH THESE STORMS.
Special weather statement, Apr 16, 10:28 AM CST, 1 hour 12 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 1128 AM CDT THU APR 16 2009 OKZ035>037-161700- JACKSON OK-KIOWA OK-TILLMAN OK- 1128 AM CDT THU APR 16 2009 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR JACKSON...KIOWA AND TILLMAN COUNTIES. A STRONG THUNDERSTORM WAS LOCATED 4 MILES SOUTHWEST OF TIPTON AT 1128 AM CDT...MOVING NORTH AT 30 MPH. SMALL HAIL AND BRIEF HEAVY RAINFALL ARE LIKELY AS THE STORM PASSES. PEOPLE IN JACKSON...KIOWA AND TILLMAN COUNTIES SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING WEATHER CONDITIONS.
Special weather statement, Apr 16, 10:34 AM CST, 1 hour 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 1134 AM CDT THU APR 16 2009 OKZ009-014-021-161700- ROGER MILLS OK-BECKHAM OK-ELLIS OK- 1134 AM CDT THU APR 16 2009 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR BECKHAM...ELLIS AND ROGER MILLS COUNTIES. A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM 10 MILES WEST OF SHATTUCK TO 11 MILES SOUTHWEST OF SWEETWATER AT 1134 AM CDT...MOVING NORTHEAST AT 25 MPH. SMALL HAIL AND BRIEF HEAVY RAINFALL ARE POSSIBLE.
Special weather statement, Apr 16, 11:06 AM CST, 34 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 1206 PM CDT THU APR 16 2009 OKZ009-014-161745- ROGER MILLS OK-ELLIS OK- 1206 PM CDT THU APR 16 2009 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR ELLIS AND ROGER MILLS COUNTIES. A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM ARNETT TO 3 MILES EAST OF REYDON AT 1206 PM CDT...MOVING NORTHEAST AT 35 MPH. SMALL HAIL AND BRIEF HEAVY RAINFALL ARE POSSIBLE.
Special weather statement, Apr 16, 11:10 AM CST, 30 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 1210 PM CDT THU APR 16 2009 OKZ034-036-161745- JACKSON OK-GREER OK- 1210 PM CDT THU APR 16 2009 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR GREER AND JACKSON COUNTIES. A STRONG THUNDERSTORM WAS LOCATED OVER OLUSTEE AT 1211 PM CDT... MOVING NORTHEAST AT 45 MPH. SMALL HAIL AND BRIEF HEAVY RAINFALL ARE POSSIBLE.
Special weather statement, Apr 16, 11:36 AM CST, 4 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 1236 PM CDT THU APR 16 2009 TXZ085-088-161815- WILBARGER TX-BAYLOR TX- 1236 PM CDT THU APR 16 2009 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR BAYLOR AND WILBARGER COUNTIES. NUMEROUS STRONG THUNDERSTORMS WERE LOCATED OVER BAYLOR AND WILBARGER COUNTIES. THESE THUNDERSTORMS WERE MOVING NORTH-NORTHEAST AT 25 MPH. SMALL HAIL AND BRIEF HEAVY RAINFALL ARE POSSIBLE.
The radar
The Altus AFB radar (KFDR), 75 km away, was scanning. The volume nearest the first event began at 17:40 UTC.
Event by event
2 hail. Local standard time, as filed.
Hail, Caddo
- When
- April 16, 6:55 PM CST
- Where
- Caddo County, 5.08 mi NE of Ft Cobb Res Dam
- Measured
- 1 in hail
- Reported by
- COOP Observer
- Coordinates
- 35.212, -98.386
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornadoes and Flash Flood in Texas, April 16, 2009
- Flash Flooding and Hail in Texas, April 16 to 17, 2009
- Tornadoes and Flash Flooding in Texas, April 16 to 17, 2009
- Flash Flooding and Hail in Texas, April 16 to 17, 2009
- Hail in Texas, April 16, 2009
- Winter Storm in Colorado, April 16 to 18, 2009
- Winter Storm in Wyoming, April 16 to 18, 2009
- Winter Storm in Colorado, April 16 to 18, 2009
- Heavy Snow in New Mexico, April 16 to 17, 2009
- Hail in Texas, April 16, 2009
- Hail in Texas, April 16, 2009
- Winter Storm in Colorado, April 16 to 18, 2009
More
Every storm in Oklahoma in 2009Every state in 2009This day in weather historyWarnings in Oklahoma, April 2009
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: 165616, 165621.