Alert archive / Oklahoma / Mesoscale Discussions in 2008
Mesoscale Discussion 511
The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2008, 2:52 AM CDT for 8 counties in Oklahoma. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- Mar 31, 2008, 2:52 AM CDT (07:52 UTC)
- Expired
- Mar 31, 2008, 3:45 AM CDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
Counties Garfield County, OK, Grant County, OK, Kay County, OK, Logan County, OK, Noble County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Lamont, OK (KLMN), launched 00:00Z, 7.9 hours before the alert went out and 44 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
- 1597 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 855 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 203 m²/s²
- 0-3 km storm-relative helicity
- 252 m²/s²
- Significant tornado parameter
- 2.1
- Supercell composite
- 10.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 310753 SWOMCD SPC MCD 310752 OKZ000-310845- MESOSCALE DISCUSSION 0511 NWS STORM PREDICTION CENTER NORMAN OK 0252 AM CDT MON MAR 31 2008 AREAS AFFECTED...NCNTRL OK CONCERNING...TORNADO WATCH 142... VALID 310752Z - 310845Z THE SEVERE WEATHER THREAT FOR TORNADO WATCH 142 CONTINUES. LOCAL WFO OUN/TSA WILL LOCALLY EXTEND TORNADO WATCH 142 UNTIL 10Z /REFER TO LOCAL WFO WCN PRODUCTS/. A COUPLE OF PERSISTENT SUPERCELLS CONTINUE ACROSS CNTRL/NCNTRL OK AT 0745Z AND ARE THRIVING IN A MOIST UNSTABLE ENVIRONMENT WITH STRONG BULK SHEAR. LARGE HAIL WILL BE LIKELY WITH THESE STORMS WITH A MODEST PROBABILITY FOR A TORNADO THROUGH 10Z. IN ADDITION...VERY HEAVY RAINFALL THREATS WILL CONTINUE AS STORMS CONTINUE TO BACKBUILD AND/OR MOVE SLOWLY ENEWD ACROSS NCNTRL/CNTRL OK. ..RACY.. 03/31/2008 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...TSA...OUN... 35819750 36709821 36979775 36909665 36619618 36319616 35979667
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 30, 8:50 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Canadian, Custer, Garfield, Grant and 4 more | 55 min |
| Mar 30, 10:52 PM CDT | Tornado Watch | SPC | Alfalfa, Blaine, Caddo, Canadian, Cleveland, Creek and 16 more | 6 hr |
| Mar 31, 1:17 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Cleveland, Creek and 16 more | 88 min |
| Mar 31, 4:00 AM CDT | Mesoscale Discussion | SPC | Pawnee | 90 min |
| Mar 31, 4:29 AM CDT | Mesoscale Discussion | SPC | Craig, Creek, Kay, Mayes, Nowata, Osage and 5 more | 91 min |
| Mar 31, 5:05 AM CDT | Severe Thunderstorm Watch | SPC | Craig, Mayes, Nowata, Osage, Pawnee, Rogers and 2 more | 7 hr |
| Mar 31, 6:17 AM CDT | Mesoscale Discussion | SPC | Craig, Delaware, Kay, Mayes, Nowata, Osage and 6 more | 88 min |
| Mar 31, 7:50 AM CDT | Mesoscale Discussion | SPC | Blaine, Craig, Garfield, Kay, Kingfisher, Logan and 9 more | 85 min |
| Mar 31, 8:44 AM CDT | Tornado Watch | SPC | Adair, Caddo, Canadian, Cherokee, Cleveland, Coal and 37 more | 7 hr |
| Mar 31, 10:30 AM CDT | Mesoscale Discussion | SPC | Adair, Caddo, Canadian, Cherokee, Cleveland, Coal and 37 more | 60 min |
| Mar 31, 12:20 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Choctaw, Cotton, Jefferson and 4 more | 55 min |
| Mar 31, 2:00 PM CDT | Tornado Watch | SPC | Atoka, Bryan, Carter, Choctaw, Jefferson, Johnston and 3 more | 7 hr |
| Mar 31, 3:04 PM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Coal, Haskell, Hughes, Latimer and 6 more | 26 min |
| Mar 31, 3:45 PM CDT | Tornado Watch | SPC | Adair, Cherokee, Choctaw, Coal, Haskell, Hughes and 8 more | 7 hr |
| Mar 31, 3:49 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Choctaw, Jefferson, Johnston and 3 more | 56 min |
| Mar 31, 6:12 PM CDT | Tornado Watch | SPC | McCurtain | 7 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2008Every mesoscale discussion in 2008
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.