Alert archive / Oklahoma / Frost Advisories in 2015
Frost Advisory 1, NWS Norman, OK
NWS Norman, OK issued this frost advisory at Apr 4, 2015, 1:15 AM CDT for 7 counties in Oklahoma. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Apr 4, 2015, 1:15 AM CDT (06:15 UTC)
- Expired
- Apr 4, 2015, 9:00 AM CDT
- In force
- 8 hr
- Issued by
- NWS Norman, OK
Counties Blaine County, OK, Canadian County, OK, Custer County, OK, Lincoln County, OK, Oklahoma County, OK, Payne County, OK, Roger Mills County, OK
The radar
The Norman radar (KTLX), 83 km from the middle of the area, began a volume at 06:20 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 nearest sounding before it
Dodge City, (KDDC), launched 00:00Z, 6.3 hours before the alert went out and 281 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2451 m above ground
- 0-6 km bulk shear
- 88 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- -13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this frost advisory 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 frost advisory went out at Apr 3, 10:43 PM CDT, 2 hours 32 minutes earlier.
Area forecast discussion, Apr 3, 10:43 PM CDT, 2 hours 32 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
1043 PM CDT FRI APR 3 2015
.DISCUSSION...
AVIATION DISCUSSION FOR THE 06Z TAFS IS BELOW.
&&
.AVIATION...
VFR CONDITIONS ARE EXPECTED TO CONTINUE.
SOUTH TO SOUTHEAST WINDS WILL FORM AND INCREASE...ESPECIALLY
IN WESTERN OKLAHOMA AFTER 14Z.
MBS
&&
.PREV DISCUSSION... /ISSUED 238 PM CDT FRI APR 3 2015/
DISCUSSION...
WINDS WILL BECOME LIGHT TONIGHT AS SFC HIGH MOVES INTO THE
REGION. THE COLDER AIR THAT HAS MOVED INTO THE AREA BEHIND THE
FRONT ALONG WITH LIGHT WINDS AND MOSTLY CLEAR SKIES WILL ALLOW
TEMPS TO FALL INTO THE 30S AND LOW 40S BY SATURDAY MORNING. SOME
LOCATIONS IN NORTHERN OK COULD SEE TEMPS AT OR A FEW DEGREES
BELOW FREEZING FOR A COUPLE OF HOURS TOMORROW MORNING. SOME LIGHT
FROST IS ALSO NOT OUT OF THE QUESTION ACROSS THE NORTHERN HALF OR
SO OF THE FA BUT DEWPOINT SPREADS ARE CURRENTLY EXPECTED TO BE
ENOUGH THAT IT WILL BE DIFFICULT FOR FROST TO DEVELOP SAT MORNING
SO WILL LEAVE A MENTION OUT OF THE FORECAST FOR NOW.
WINDS WILL GRADUALLY SHIFT TOWARDS THE SOUTH/SOUTHEAST SATURDAY
AND COULD BECOME BREEZY IN NORTHWEST PARTS OF THE AREA. MOISTURE
WILL BEGIN TO GRADUALLY SPREAD NORTH INTO PARTS OF THE FA DURING
THE DAY SATURDAY BUT HUMIDITIES WILL STILL BE LOW SAT AFTN...
ESPECIALLY IN NW OK. SO WITH LOW HUMIDITIES... HIGHS IN THE MID
60S... AND POSSIBLY BREEZY WINDS WILL CONTINUE WITH THE FIRE
WX WATCH FOR SAT AFTN. HOWEVER... THERE IS STILL A QUESTION OF
WHETHER THE WIND SPEEDS WILL REACH RED FLAG CRITERIA. IN
SOUTHWEST OK AND WESTERN NORTH TEXAS... WINDS ARE EXPECTED TO
REMAIN BELOW CRITERIA SO WILL CANCEL THE WATCH IN THESE AREAS.
MOISTURE WILL SPREAD BACK NORTH MORE AGGRESSIVELY SATURDAY NIGHT
INTO SUNDAY AS WAA DEVELOPS. THE WAA WILL PROVIDE LIFT FOR A
CHANCE OF SHOWERS/STORMS IN PARTS OF THE FA WITH THE BEST CHANCE
IN SOUTH CENTRAL/SE OK.
NEXT WEEK... THE DRYLINE WILL LIKELY BE IN OR NEAR PARTS OF THE
AREA THROUGH AT LEAST THURSDAY WHICH ALONG WITH DAYTIME HEATING
AND ANY UPPER LEVEL DISTURBANCES WILL BRING A CHANCE OF STORMS TO
AT LEAST PARTS OF THE FA PRETTY MUCH EVERY DAY. MODELS ALSO SHOW
A FRONTAL BOUNDARY NEAR OR IN PARTS OF NORTHERN OK WHICH COULD
ALSO PROVIDE SOME LIFT FOR CONVECTION. MODELS THEN SHOW UPPER
TROUGH FINALLY MOVING ACROSS THE CENTRAL U.S. LATE NEXT WEEK WITH
A COLD FRONT MOVING ACROSS PARTS OF THE AREA ALTHOUGH THERE IS
STILL A GREAT DEAL OF UNCERTAINTY WITH TIMING ETC. SOME SEVERE
STORMS WILL BE POSSIBLE NEXT WEEK. IN ADDITION... PARTS OF THE
AREA COULD SEE MULTIPLE DAYS OF ELEVATED FIRE WX CONCERNS...
ESPECIALLY IN WESTERN PARTS OF THE FA WHICH WILL HAVE THE BEST
CHANCE TO BE BEHIND THE DRYLINE AT TIMES.
&&
.OUN WATCHES/WARNINGS/ADVISORIES...
OK...FIRE WEATHER WATCH FROM SATURDAY AFTERNOON THROUGH SATURDAY
EVENING FOR OKZ004>006-009>011-014>016-021-022.
TX...NONE.
&&
84/17Hazardous weather outlook, Apr 3, 6:22 PM CDT, 6 hours 53 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE NORMAN OK 622 PM CDT FRI APR 3 2015 OKZ004>048-050>052-TXZ083>090-041800- 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- 622 PM CDT FRI APR 3 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN... WESTERN...CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS. .DAY ONE...THROUGH TONIGHT... .COLD TEMPERATURES... TEMPERATURES WILL DROP TO NEAR FREEZING ACROSS NORTHERN OKLAHOMA SATURDAY MORNING WITH A FREEZE POSSIBLE IN SHELTERED AREAS. THESE COLD TEMPERATURES MAY AFFECT PLANTS THAT ARE SENSITIVE TO COLD WEATHER. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY... .FIRE WEATHER... AN ELEVATED RISK OF WILDFIRES WILL BE THE RULE THROUGH THE PERIOD...AS RELATIVELY STRONG WINDS AND WARM TEMPERATURES WILL BE COMMON MOST ANY DAY. A FIRE WEATHER WATCH IS IN EFFECT ON SATURDAY FOR NORTHWESTERN AND WEST CENTRAL OKLAHOMA...WHERE WINDS WILL BE THE STRONGEST. ADDITIONAL FIRE WEATHER WATCHES AND/OR WARNINGS WILL LIKELY BE NEEDED IN LATER FORECASTS. .THUNDERSTORMS... A CHANCE OF THUNDERSTORMS WILL RETURN SATURDAY NIGHT TO SOUTHERN OKLAHOMA AND NORTH TEXAS. THE CHANCE FOR STORMS WILL CONTINUE OVER MUCH OF THE REGION FROM SUNDAY THROUGH THURSDAY NIGHT. THE RISK OF SEVERE STORMS WILL BE GREATEST WEDNESDAY AND THURSDAY. GET GRAPHICS AND MORE DETAILS AT WEATHER.GOV/NORMAN...AND FOLLOW OUR WEATHER FORECAST OFFICE ON TWITTER AND FACEBOOK. 26/AUSTIN
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 1:15 AM CDT | Freeze Warning | OUN | Alfalfa, Dewey, Ellis, Garfield, Grant, Harper and 7 more | 8 hr |
| Apr 4, 3:31 AM CDT | Red Flag Warning | OUN | Ellis, Harper, Woods, Woodward | 15 hr |
Nearby
Frost Advisories in Oklahoma, 2015Every frost advisory 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.