Alert archive / Arkansas / Mesoscale Discussions in 2005
Mesoscale Discussion 2201
The Storm Prediction Center issued this mesoscale discussion at Sep 14, 2005, 2:27 PM CDT for 21 counties in Arkansas; 4 counties in Oklahoma. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Sep 14, 2005, 2:27 PM CDT (19:27 UTC)
- Expired
- Sep 14, 2005, 4:00 PM CDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
All 25 counties
Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Clark County, AR, Cleveland County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Lincoln County, AR, Little River County, AR, Montgomery County, AR, Nevada County, AR, Ouachita County, AR, Pike County, AR, Polk County, AR, Sevier County, AR, Union County, AR, Atoka County, OK, Latimer County, OK, McCurtain County, OK, Pushmataha County, OK
The radar
The Western Arkansas radar (KSRX), 153 km from the middle of the area, began a volume at 19:30 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
Shreveport, LA (KSHV), launched 12:00Z, 7.5 hours before the alert went out and 170 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
- 1268 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 801 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 141928 SWOMCD SPC MCD 141927 MSZ000-ARZ000-LAZ000-TXZ000-OKZ000-142100- MESOSCALE DISCUSSION 2201 NWS STORM PREDICTION CENTER NORMAN OK 0227 PM CDT WED SEP 14 2005 AREAS AFFECTED...SERN OK INTO SRN AR CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 141927Z - 142100Z SEVERE WEATHER THREAT IS EXPECTED TO INCREASE ACROSS DISCUSSION AREA THIS AFTERNOON. CONVECTIVE TRENDS ARE BEING MONITORED FOR A POSSIBLE WW ISSUANCE. LATEST MESOANALYSIS INDICATED OUTFLOW BOUNDARY FROM S OF MLC TO NEAR DEQ TO LLQ IN SERN AR. AIR MASS S OF THIS BOUNDARY IS HOT AND MOIST THIS AFTERNOON...HOWEVER 18Z SHV SOUNDING SUGGESTS THAT RELATIVELY WARM MID-LEVEL TEMPERATURES ARE LIMITING MLCAPES TO 1000-1500 J/KG. CONTINUED BOUNDARY-LAYER HEATING COUPLED WITH SUSTAINED CONVERGENCE ALONG OUTFLOW BOUNDARY MAY LEAD TO AN INCREASE IN STORM COVERAGE AND INTENSITY LATER THIS AFTERNOON INTO EVENING. CURRENT DEQUEEN AR PROFILER SHOWS RELATIVELY WEAK WINDS THROUGH THE LOWEST 5 KM AGL...THOUGH UPSTREAM PURCELL OK PROFILER INDICATES A NOTICEABLE INCREASE IN MID-LEVEL WIND SPEEDS. GIVEN THE MODERATE INSTABILITY AND INCREASING VERTICAL SHEAR...IT APPEARS THAT SOME POTENTIAL EXISTS FOR A FEW SEVERE STORMS WITH THE PRIMARY SEVERE THREAT BEING DAMAGING WINDS. ..MEAD.. 09/14/2005 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...JAN...LZK...SHV...TSA...OUN... 34149582 34509613 34959558 34759445 34349284 34089167 33819110 33239129 33009202 33349344 33799481
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 13, 9:10 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Carroll | 7 hr |
| Sep 14, 2:15 AM CDT | Mesoscale Discussion | SPC | Benton, Carroll | 60 min |
| Sep 13, 7:29 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Craig, Garfield, Grant, Kay, Mayes and 7 more | 2 hr |
| Sep 13, 9:03 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Cleveland, Comanche and 23 more | 87 min |
| Sep 14, 1:35 AM CDT | Mesoscale Discussion | SPC | Beckham, Caddo, Canadian, Comanche, Cotton, Custer and 9 more | 55 min |
| Sep 14, 3:50 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Beckham, Blaine, Caddo, Canadian, Cherokee and 29 more | 6 hr |
| Sep 14, 7:51 AM CDT | Mesoscale Discussion | SPC | Adair, Alfalfa, Beckham, Blaine, Caddo, Canadian and 53 more | 54 min |
| Sep 14, 1:38 PM CDT | Mesoscale Discussion | SPC | Carter, Cleveland, Coal, Comanche, Cotton, Garvin and 12 more | 97 min |
| Sep 14, 3:05 PM CDT | Tornado Watch | SPC | Carter, Comanche, Cotton, Garvin, Jackson, Jefferson and 5 more | 7 hr |
| Sep 14, 4:40 PM CDT | Mesoscale Discussion | SPC | Cimarron | 2 hr |
| Sep 14, 5:02 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 25 more | 118 min |
| Sep 14, 6:28 PM CDT | Mesoscale Discussion | SPC | Carter, Comanche, Cotton, Garvin, Jackson, Jefferson and 5 more | 92 min |
Nearby
Mesoscale Discussions in Arkansas, 2005Mesoscale Discussions in Oklahoma, 2005Every mesoscale discussion in 2005
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.