Alert archive / Oklahoma / Mesoscale Discussions in 2012
Mesoscale Discussion 100
The Storm Prediction Center issued this mesoscale discussion at Feb 3, 2012, 9:42 AM CST for 9 counties in Oklahoma; Hardeman County, Texas. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Feb 3, 2012, 9:42 AM CST (15:42 UTC)
- Expired
- Feb 3, 2012, 10:45 AM CST
- In force
- 63 min
- Issued by
- the Storm Prediction Center
Counties Caddo County, OK, Comanche County, OK, Cotton County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Tillman County, OK, Washita County, OK, Hardeman County, TX
The radar
The Altus AFB radar (KFDR), 39 km from the middle of the area, began a volume at 15:43 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, 3.7 hours before the alert went out and 172 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
- 592 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 478 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 301 m²/s²
- 0-3 km storm-relative helicity
- 343 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.1
The text
As transmitted, in the capitals the NWS used until 2016.
746 ACUS11 KWNS 031542 SWOMCD SPC MCD 031542 OKZ000-TXZ000-031645- MESOSCALE DISCUSSION 0100 NWS STORM PREDICTION CENTER NORMAN OK 0942 AM CST FRI FEB 03 2012 AREAS AFFECTED...SWRN THROUGH CNTRL OK CONCERNING...TORNADO WATCH 24... VALID 031542Z - 031645Z THE SEVERE WEATHER THREAT FOR TORNADO WATCH 24 CONTINUES. WW 24 IS SCHEDULED TO EXPIRE AT 16Z. MOST STORMS DEVELOPING ACROSS OK INTO NWRN TX WILL PROBABLY REMAIN SUB-SEVERE DURING MUCH OF THE MORNING. HOWEVER...STORMS MAY INTENSIFY BY MID DAY OR THIS AFTERNOON WHEN ANOTHER WW MAY BE NEEDED. STORMS CONTINUE DEVELOPING THIS MORNING ALONG A COLD FRONT THAT EXTENDS FROM A SURFACE LOW IN WRN OK SWWD THROUGH WRN TX. OTHER STORMS ARE DEVELOPING INTO CNTRL AND NRN OK WITHIN WARM ADVECTION REGIME AND NORTH OF A CONVECTIVELY REINFORCED WARM FRONT. VWP DATA INDICATE SIZEABLE 0-1 KM HODOGRAPHS ALONG LLJ AXIS. HOWEVER...MORNING RAOB DATA INDICATE A STABLE LAYER NEAR THE SFC SUGGESTING THE EFFECTIVE INFLOW LAYER REMAINS ABOVE THE STRONGER LOW LEVEL SHEAR. STORMS WILL LIKELY BE SLOW TO INTENSIFY DUE TO WIDESPREAD STRATUS THAT WILL LIMIT BOUNDARY LAYER WARMING. HOWEVER...SOME OF THE LOW CLOUDS MAY BEGIN TO MIX OUT FROM THE SW LATER THIS MORNING INTO THE AFTERNOON WHICH WOULD CONTRIBUTE TO BOUNDARY LAYER DESTABILIZATION AND STORM INTENSIFICATION. IF THIS OCCURS...THREAT WILL EXIST FOR SUPERCELLS AND BOWING SEGMENTS WITH ISOLATED DAMAGING WIND...HAIL AND ISOLATED TORNADOES POSSIBLE. ..DIAL.. 02/03/2012 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...OUN...LUB... LAT...LON 34150001 34859985 35489928 35349787 34099800 34150001
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 2, 7:08 PM CST | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Comanche, Custer and 13 more | 67 min |
| Feb 2, 7:38 PM CST | Severe Thunderstorm Watch | SPC | Beckham, Blaine, Caddo, Canadian, Comanche, Cotton and 16 more | 7 hr |
| Feb 2, 9:48 PM CST | Mesoscale Discussion | SPC | Alfalfa, Beaver, Beckham, Blaine, Custer, Dewey and 11 more | 117 min |
| Feb 2, 11:44 PM CST | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Comanche, Custer and 14 more | 91 min |
| Feb 3, 2:00 AM CST | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 24 more | 60 min |
| Feb 3, 2:25 AM CST | Tornado Watch | SPC | Beckham, Blaine, Caddo, Canadian, Comanche, Cotton and 16 more | 8 hr |
| Feb 3, 7:15 AM CST | Mesoscale Discussion | SPC | Beckham, Caddo, Canadian, Comanche, Cotton, Custer and 8 more | 90 min |
| Feb 3, 11:59 AM CST | Mesoscale Discussion | SPC | Carter, Comanche, Cotton, Garvin, Grady, Jefferson and 3 more | 91 min |
| Feb 3, 12:26 PM CST | Tornado Watch | SPC | Atoka, Bryan, Carter, Comanche, Cotton, Garvin and 8 more | 8 hr |
| Feb 3, 3:17 PM CST | Mesoscale Discussion | SPC | Carter, Garvin, Jefferson, Johnston, Love, Marshall and 1 more | 88 min |
| Feb 3, 5:41 PM CST | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Coal, Garvin, Hughes and 8 more | 2 hr |
| Feb 3, 6:35 AM CST | Mesoscale Discussion | SPC | Jasper, Newton, Sabine, Tyler | 115 min |
Nearby
Mesoscale Discussions in Oklahoma, 2012Mesoscale Discussions in Texas, 2012Every mesoscale discussion 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.