Alert archive / Oklahoma / Mesoscale Discussions in 2007
Mesoscale Discussion 261
The Storm Prediction Center issued this mesoscale discussion at Mar 9, 2007, 11:36 AM CST for 29 counties in Oklahoma; 10 counties in Texas. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- Mar 9, 2007, 11:36 AM CST (17:36 UTC)
- Expired
- Mar 9, 2007, 1:00 PM CST
- In force
- 84 min
- Issued by
- the Storm Prediction Center
All 39 counties
Atoka County, OK, Bryan County, OK, Carter County, OK, Cherokee County, OK, Choctaw County, OK, Coal County, OK, Creek County, OK, Garvin County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Love County, OK, Marshall County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Collin County, TX, Cooke County, TX, Delta County, TX, Denton County, TX, Fannin County, TX, Grayson County, TX, Hopkins County, TX, Hunt County, TX, Lamar County, TX, Montague County, TX
The radar
The Norman radar (KTLX), 126 km from the middle of the area, began a volume at 17:35 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 5.6 hours before the alert went out and 124 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
- 1493 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 323 m²/s²
- 0-3 km storm-relative helicity
- 432 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 091736 SWOMCD SPC MCD 091736 ARZ000-OKZ000-TXZ000-091900- MESOSCALE DISCUSSION 0261 NWS STORM PREDICTION CENTER NORMAN OK 1136 AM CST FRI MAR 09 2007 AREAS AFFECTED...ERN OK...NE TX CONCERNING...SEVERE POTENTIAL...WATCH LIKELY VALID 091736Z - 091900Z THUNDERSTORM INITIATION APPEARS INCREASINGLY LIKELY OVER THE NEXT FEW HOURS ACROSS ERN OK AND NE TX. AS THUNDERSTORMS INCREASE IN INTENSITY LATE THIS AFTERNOON...HAIL SHOULD BE THE PRIMARY THREAT ALTHOUGH A FEW STRONG WIND GUSTS MAY ALSO OCCUR. A SEVERE WEATHER WATCH WILL LIKELY BECOME NECESSARY LATE THIS AFTERNOON ACROSS THE REGION. FASTEST SFC ANALYSIS SHOWS A WELL-DEFINED COLD FRONT EXTENDING SSWWD ACROSS WCNTRL OK INTO NCNTRL TX. A THERMAL AXIS EXISTS AHEAD OF THE FRONT WHERE SFC TEMPS ARE NEAR 70 F. FORECAST SOUNDINGS ALONG THE THERMAL AXIS SHOW CONVECTIVE TRIGGER TEMPS AROUND 72 F. THIS WILL LIKELY BE REACHED BY 20Z SUGGESTING CONVECTION SHOULD DEVELOP ALONG THE THERMAL AXIS OVER THE NEXT 1 TO 2 HOURS. VISIBLE SATELLITE IMAGERY SHOWS TWO AREAS WITH POTENTIAL FOR INITIATION. THE FIRST IS NEAR AND JUST NE OF THE OKLAHOMA CITY OK AREA AND THE SECOND IS NW OF FORT WORTH NEAR THE RED RIVER. IF THUNDERSTORMS INITIATE IN EITHER AREA THIS AFTERNOON...STEEP LAPSE RATES AND MODERATE SHEAR PROFILES SUGGEST ISOLATED SUPERCELLS WITH HAIL WILL BE LIKELY. THE CONVECTION SHOULD GRADUALLY BECOME SFC-BASED WITH THE SEVERE THREAT INCREASING THROUGH LATE AFTERNOON. ..BROYLES.. 03/09/2007 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...SHV...TSA...FWD...OUN... 35959676 36149623 36119512 35319439 33249535 32939598 32989676 33169733 33519779 33909778
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 3:31 PM CST | Severe Thunderstorm Watch | SPC | Atoka, Bryan, Choctaw, Haskell, Latimer, LeFlore and 3 more | 6 hr |
| Mar 9, 4:39 PM CST | Mesoscale Discussion | SPC | Adair, Cherokee, Craig, Delaware, Mayes, Muskogee and 4 more | 96 min |
| Mar 9, 5:03 PM CST | Severe Thunderstorm Watch | SPC | Adair, Cherokee, Craig, Delaware, Mayes, Muskogee and 3 more | 5 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2007Mesoscale Discussions in Texas, 2007Every mesoscale discussion in 2007
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.