Alert archive / Oklahoma / Special Weather Statements in 2012
Special Weather Statement, NWS Norman, OK
NWS Norman, OK issued this special weather statement at Mar 31, 2012, 4:51 AM CDT for Marshall County, Oklahoma. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 31, 2012, 4:51 AM CDT (09:51 UTC)
- Expired
- Mar 31, 2012, 5:15 AM CDT
- In force
- 24 min
- Issued by
- NWS Norman, OK
County Marshall County, OK
The radar
The Norman radar (KTLX), 150 km from the middle of the area, began a volume at 09:53 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 145 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
- 1530 J/kg
- Mixed-layer CIN
- -116 J/kg
- Mixed-layer LCL
- 1449 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Mar 31, 3:38 AM CDT, 1 hour 13 minutes earlier.
Area forecast discussion, Mar 31, 3:38 AM CDT, 1 hour 13 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORMAN OK 338 AM CDT SAT MAR 31 2012 .DISCUSSION... ONE SMALL AREA OF STORMS HAS DEVELOPED THIS MORNING ACROSS PORTIONS OF SOUTH CENTRAL INTO SOUTHEAST OKLAHOMA AS MID LEVEL WAVE EXITS. WILL KEEP A PRE-FIRST PERIOD WORDING TO ACCOUNT FOR THIS ACTIVITY... BUT EXPECT IT TO MOVE OUT OF THE AREA LATER THIS MORNING. REMAINDER OF THE WEEKEND SHOULD REMAIN UNDER THE INFLUENCE OF MID LEVEL RIDGING. THIS WILL KEEP THINGS DRY AND VERY WARM FOR LATE MARCH/EARLY APRIL. AFTER SOME EARLY MORNING FOG TODAY EXPECT TO SEE MOSTLY SUNNY SKIES AND RELATIVELY LIGHT SOUTH WINDS TODAY WITH WIND PICKING UP SOME ON SUNDAY. THIS WILL BE IN RESPONSE TO APPROACHING STORM SYSTEM THAT WILL IMPACT THE SOUTHERN PLAINS EARLY NEXT WEEK. NEAR RECORD TEMPS ARE FORECAST FOR SUNDAY WITH GUSTY SOUTH WINDS... COULD BE SOME ELEVATED FIRE WEATHER CONCERNS ACROSS FAR WESTERN OKLAHOMA INTO WESTERN NORTH TEXAS. HOWEVER WITH RECENT RAINS HAVE SEEN SOME GREEN-UP WITH VEGETATION EVEN OUT WEST AND DO NOT ANTICIPATE NEED FOR FIRE WEATHER WATCH/RED FLAG WARNINGS AT THIS TIME. THERE IS STILL QUITE A BIT OF UNCERTAINTY ASSOCIATED WITH THE STORM SYSTEM NEXT WEEK. MODELS DO AGREE THAT THE WAVE WILL CLOSE OFF TO OUR WEST AND HAVE TRENDED SLOWER WITH ITS EASTWARD PROGRESSION THROUGH THE AREA. THE GFS TRANSLATES THE LOW FARTHER NORTH INTO KANSAS WITH OKLAHOMA MORE UNDER THE INFLUENCE OF DRY SLOT... WHILE ECMWF BRINGS THE UPPER LOW ALMOST DIRECTLY OVERHEAD THROUGH THURSDAY KEEPING RAIN CHANCES LINGERING ACROSS THE AREA THROUGH MUCH OF NEXT WEEK. FOR NOW WILL KEEP SOME LOW POPS THROUGH TUESDAY BEFORE DRYING THINGS OUT... BUT OBVIOUSLY WILL HAVE TO CONT TO MONITOR TRENDS CLOSELY. AS FOR MONDAY... BOTH GFS AND NAM SUGGEST AN EPISODE OF STRONG TO SEVERE STORMS DEVELOPING ACROSS THE AREA ALONG AND TO THE EAST OF THE DRYLINE LATE MONDAY AFTN AND LINGERING THEM INTO MONDAY NIGHT. AT THIS POINT THIS WOULD APPEAR TO AFFECT ABOUT THE EASTERN TWO- THIRDS OF OKLAHOMA WITH MUCH OF WESTERN OKLAHOMA AND WESTERN NORTH TEXAS REMAINING DRY. AGAIN WILL NEED TO WATCH TRENDS AS MODELS ARE TRENDING SLOWER AND THIS IN TURN HAS ALLOWED PRECIP IN THE MODELS TO DEVELOP FARTHER WEST THAN EARLIER RUNS. && .PRELIMINARY POINT TEMPS/POPS... OKLAHOMA CITY OK 84 61 91 62 / 10 0 0 10 HOBART OK 84 59 89 56 / 10 0 0 0 WICHITA FALLS TX 86 63 94 63 / 10 0 0 10 GAGE OK 84 55 89 52 / 10 0 0 0 PONCA CITY OK 85 61 89 66 / 10 0 0 10 DURANT OK 83 66 86 66 / 10 10 10 10 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...NONE. TX...NONE. && 22/30
Hazardous weather outlook, Mar 30, 9:51 PM CDT, 7 hours before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE NORMAN OK 951 PM CDT FRI MAR 30 2012 OKZ004>048-050>052-TXZ083>090-010300- 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- 951 PM CDT FRI MAR 30 2012 THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN... CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS. .DAY ONE...REST OF TONIGHT... THUNDERSTORM OUTLOOK... ISOLATED SHOWERS AND THUNDERSTORMS MAY IMPACT SOUTH CENTRAL AND SOUTHEASTERN OKLAHOMA DURING THE OVERNIGHT HOURS...BUT WIDESPREAD SEVERE WEATHER IS NOT ANTICIPATED. DISCUSSION... VERY LITTLE THUNDERSTORM DEVELOPMENT IS EXPECTED DURING THE OVERNIGHT HOURS...ALTHOUGH ONE OR TWO THUNDERSTORMS CAN NOT BE RULED OUT ACROSS SOUTHERN AND SOUTHEASTERN OKLAHOMA. FOG WILL LIKELY DEVELOP LATE TONIGHT AND INTO THE EARLY MORNING HOURS MAINLY ALONG AND WEST OF I-35...AND SOUTH OF I-40. PROBABILITY TABLE... VALID THROUGH 700 AM CDT SATURDAY MAR 31. PROBABILITY OF THUNDERSTORMS OCCURRING IN THE NWS NORMAN COUNTY WARNING AREA...20 PERCENT. PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...10 PERCENT. OTHER HAZARDOUS WEATHER... FOG MAY RESULT IN REDUCED VISIBILITY LATE TONIGHT THROUGH EARLY SATURDAY MORNING. MOTORISTS SHOULD BE ON THE LOOK OUT FOR FOG...ESPECIALLY AFTER MIDNIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY... THUNDERSTORM OUTLOOK... AFTER A DRY WEEKEND...A CHANCE OF THUNDERSTORMS WILL RETURN ON MONDAY AND TUESDAY. GIVEN THE TIME OF YEAR...SEVERE WEATHER MAY BE A POSSIBILITY EARLY NEXT WEEK...BUT THE LEVEL OF RISK IS UNCERTAIN AT THIS TIME. OTHER HAZARDOUS WEATHER... NONE. THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY 5 AM SATURDAY.
In the hours before
Special weather statement, Mar 31, 2:13 AM CDT, 2 hours 38 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 213 AM CDT SAT MAR 31 2012 OKZ046-047-051-310745- MARSHALL OK-JOHNSTON OK-CARTER OK- 213 AM CDT SAT MAR 31 2012 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN MARSHALL... SOUTHWESTERN JOHNSTON AND CARTER COUNTIES UNTIL 245 AM CDT... AT 210 AM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR ARDMORE... MOVING NORTHEAST AT 25 MPH. HAZARDS INCLUDE... HAIL UP TO THE SIZE OF NICKELS... WIND GUSTS TO 40 MPH... LOCATIONS IMPACTED INCLUDE... ARDMORE...LONE GROVE...DICKSON...MANNSVILLE...GENE AUTRY AND RUSSETT. LAT...LON 3425 9732 3433 9686 3411 9675 3408 9730 TIME...MOT...LOC 0710Z 244DEG 23KT 3419 9715 30
Special weather statement, Mar 31, 2:48 AM CDT, 2 hours 3 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 248 AM CDT SAT MAR 31 2012 OKZ046-047-051-310815- MARSHALL OK-JOHNSTON OK-CARTER OK- 248 AM CDT SAT MAR 31 2012 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN MARSHALL... SOUTHWESTERN JOHNSTON AND CARTER COUNTIES UNTIL 315 AM CDT... AT 245 AM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING FROM 5 MILES NORTH OF MANNSVILLE TO LONE GROVE...MOVING NORTHEAST AT 30 MPH. HAZARDS INCLUDE... HAIL UP TO THE SIZE OF NICKELS... WIND GUSTS TO 40 MPH... LOCATIONS IMPACTED INCLUDE... ARDMORE...LONE GROVE...DICKSON...OAKLAND...MANNSVILLE...RAVIA... GENE AUTRY...REAGAN AND RUSSETT. LAT...LON 3428 9724 3438 9665 3408 9679 3408 9731 TIME...MOT...LOC 0745Z 245DEG 25KT 3424 9692 3420 9723 30
Special weather statement, Mar 31, 3:33 AM CDT, 1 hour 18 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
333 AM CDT SAT MAR 31 2012
OKZ046-047-051-310900-
MARSHALL OK-JOHNSTON OK-CARTER OK-
333 AM CDT SAT MAR 31 2012
...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL MARSHALL...
JOHNSTON AND CARTER COUNTIES UNTIL 400 AM CDT...
AT 329 AM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING
FROM 4 MILES SOUTHEAST OF REAGAN TO ARDMORE...MOVING NORTHEAST AT 25
MPH.
HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 40 MPH...
LOCATIONS IMPACTED INCLUDE...
ARDMORE...TISHOMINGO...DICKSON...MANNSVILLE...RAVIA...MILBURN...
GENE AUTRY...FILLMORE...NIDA...REAGAN AND RUSSETT.
LAT...LON 3412 9648 3410 9722 3430 9720 3434 9696
3433 9689 3435 9688 3442 9646
TIME...MOT...LOC 0829Z 245DEG 23KT 3434 9661 3420 9715
30Special weather statement, Mar 31, 4:51 AM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
451 AM CDT SAT MAR 31 2012
OKZ046-047-051-052-311015-
BRYAN OK-MARSHALL OK-JOHNSTON OK-CARTER OK-
451 AM CDT SAT MAR 31 2012
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN BRYAN...MARSHALL...
JOHNSTON AND EAST CENTRAL CARTER COUNTIES UNTIL 515 AM CDT...
AT 448 AM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING
FROM 3 MILES EAST OF TISHOMINGO TO DICKSON...MOVING EAST AT 10 MPH.
HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 40 MPH...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...
LOCATIONS IMPACTED INCLUDE...
MADILL...TISHOMINGO...KINGSTON...DICKSON...OAKLAND...MANNSVILLE...
BOKCHITO...RAVIA...MILBURN...SILO...KENEFIC...ARMSTRONG...NIDA...
RUSSETT AND LITTLE CITY.
LAT...LON 3401 9613 3400 9689 3427 9716 3432 9657
3420 9640 3416 9640 3416 9634
TIME...MOT...LOC 0948Z 282DEG 8KT 3422 9660 3420 9700
30The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 2:13 AM CDT | Special Weather Statement | OUN | Carter | 32 min |
| Mar 31, 2:48 AM CDT | Special Weather Statement | OUN | Carter | 27 min |
| Mar 31, 3:33 AM CDT | Special Weather Statement | OUN | Johnston | 27 min |
| Mar 31, 5:16 AM CDT | Special Weather Statement | OUN | Bryan | 29 min |
| Mar 31, 5:27 AM CDT | Severe Thunderstorm Warning | OUN | Bryan | 63 min |
| Mar 31, 5:33 AM CDT | Dense Fog Advisory | OUN | Beckham, Caddo, Comanche, Cotton, Grady, Greer and 7 more | 4 hr |
Nearby
Special Weather Statements in Oklahoma, 2012Every special weather statement in 2012
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.