Alert archive / Missouri / Mesoscale Discussions in 2011
Mesoscale Discussion 2045
The Storm Prediction Center issued this mesoscale discussion at Aug 23, 2011, 5:25 PM CDT for Clay County, Greene County, Randolph County, Arkansas; 8 counties in Missouri; Lake County, Tennessee. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- Aug 23, 2011, 5:25 PM CDT (22:25 UTC)
- Expired
- Aug 23, 2011, 6:30 PM CDT
- In force
- 65 min
- Issued by
- the Storm Prediction Center
Counties Clay County, AR, Greene County, AR, Randolph County, AR, Butler County, MO, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO, Lake County, TN
The radar
The Memphis radar (KNQA), 129 km from the middle of the area, began a volume at 22:26 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
Little Rock, AR (KLZK), launched 12:00Z, 10.4 hours before the alert went out and 184 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
- 4250 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 740 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
073
ACUS11 KWNS 232225
SWOMCD
SPC MCD 232225
TNZ000-KYZ000-MOZ000-ILZ000-ARZ000-232330-
MESOSCALE DISCUSSION 2045
NWS STORM PREDICTION CENTER NORMAN OK
0525 PM CDT TUE AUG 23 2011
AREAS AFFECTED...NERN ARK / SERN MO
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 232225Z - 232330Z
A FEW ISOLD REPORTS OF LARGE HAIL/WIND DMG MAY OCCUR THRU DUSK OVER
SERN MO AND NERN ARK. ISOLD COVERAGE/EXPECTED STORM INTENSITY
PRECLUDE THE NEED FOR A WW.
LOW LEVEL SLYS W OF A RESIDUAL FRONT DRAPED FROM IL SWD INTO NERN MS
ARE WITHIN A RESERVOIR OF HIGH PW /AOA 2 INCHES/. THIS IS
CONTRIBUTING TO A VERY UNSTABLE AIRMASS /3000 J/KG MLCAPE/ PER RUC
FORECAST SOUNDINGS ACROSS THE DISCUSSION AREA. SUBSTANTIAL VEERING
WIND PROFILES ARE UNDERNEATH A PLUME OF MODERATE NWLY FLOW ALOFT
EXTENDING SWD INTO THE REGION FROM THE MIDWEST...AND IS RESULTING IN
30-40 KTS EFFECTIVE SHEAR AND THIS MAY AID IN SOME STORM
ORGANIZATION. CURRENT THINKING IS ONGOING ACTIVITY SHOULD PERSIST
INTO THE EARLY EVENING HOURS POSING AN ISOLD LARGE
HAIL/STRONG-SEVERE WIND GUST THREAT.
..SMITH.. 08/23/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...PAH...MEG...
LAT...LON 35859065 36149117 37189055 37269002 37068930 36568924
35938983 35859065SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 4:40 PM CDT | Mesoscale Discussion | SPC | Columbia, Lafayette, Miller | 35 min |
Nearby
Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Arkansas, 2011Mesoscale Discussions in Tennessee, 2011Every mesoscale discussion in 2011
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.