Alert archive / Arkansas / Mesoscale Discussions in 2003
Mesoscale Discussion 152
The Storm Prediction Center issued this mesoscale discussion at Feb 24, 2003, 2:42 PM CST for 26 counties in Arkansas. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 24, 2003, 2:42 PM CST (20:42 UTC)
- Expired
- Feb 24, 2003, 6:45 PM CST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 26 counties
Cleburne County, AR, Conway County, AR, Cross County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Independence County, AR, Jackson County, AR, Jefferson County, AR, Logan County, AR, Lonoke County, AR, Monroe County, AR, Montgomery County, AR, Perry County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, St. Francis County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR
The radar
The Little Rock radar (KLZK), 38 km from the middle of the area, began a volume at 20:41 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
Springfield, MO (KSGF), launched 12:00Z, 8.7 hours before the alert went out and 230 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
- 2 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 510 m above ground
- 0-6 km bulk shear
- 77 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
709 ACUS11 KWNS 242042 SWOMCD SPC MCD 242042 ARZ000-250045- MESOSCALE DISCUSSION 0152 NWS STORM PREDICTION CENTER NORMAN OK 0242 PM CST MON FEB 24 2003 AREAS AFFECTED...CNTRL AR CONCERNING...PRECIPITATION TRENDS...WINTER PRECIPITATION VALID 242042Z - 250045Z ...SNOW AND SLEET WILL DEVELOP ACROSS CNTRL AR BY EVENING... IMPRESSIVE AREA OF CONVECTION CONTINUES TO DEVELOP AND MOVE NEWD THROUGH NCNTRL TX INTO SERN OK TOWARD CNTRL AR THIS AFTERNOON...STILL AHEAD OF LATEST SHORT TERM MODELS. LATEST ISENTROPIC ANALYSIS USING THE 297 K SURFACE INDICATES THE STRONGEST ADIABATIC ASCENT OCCURRING WEST OF DFW AREA. RECENTLY...HOWEVER... ASCENT HAS INCREASED OVER ECNTRL OK WITH 2-4 G/KG MIXING RATIOS SURGING NWD INTO THE TEXARKANA REGION. THUS...EXPANDING CONVECTIVE ELEMENTS OBSERVED ON THE FSM RADAR OVER ECNTRL OK WILL LIKELY SPREAD EWD INTO CNTRL AR BY THIS EVENING. WET BULB TEMPERATURES CURRENTLY ARE AROUND 30F OVER CNTRL AR AND AS THE COLUMN COOLS/PCPN DEVELOPS...TEMPERATURES SHOULD FALL RAPIDLY TO AOB FREEZING. THOUGH PCPN COULD START OUT AS RAIN/SLEET...LATEST RUC40 EXPERIMENTAL PCPN-TYPE ALGORITHMS SUGGEST THAT MAINLY SNOW IS LIKELY FROM PGO/FSM-LIT-JBR AND SNOWFALL RATES COULD APPROACH 1 INCH PER HOUR. FARTHER SOUTH...SLEET SHOULD BE THE PREDOMINATE PCPN-TYPE WHERE TEMPERATURES NEAR 850 MB ONLY COOL TO 1-2C. SNOW COULD MIX IN FROM TIME TO TIME WITH THE SLEET IN THE HEAVIER PCPN CORES. ..RACY/SCHNEIDER.. 02/24/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... 35459414 35859154 35819061 34879077 34229197 34299412
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 24, 10:40 AM CST | Mesoscale Discussion | SPC | Hempstead, Howard, Little River, Pike, Polk, Sevier | 4 hr |
Nearby
Mesoscale Discussions in Arkansas, 2003Every mesoscale discussion in 2003
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.