Alert archive / Arkansas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 368, NWS Little Rock, AR
NWS Little Rock, AR issued this severe thunderstorm warning at Sep 8, 2001, 1:21 AM CDT for Johnson County, Logan County, Arkansas. It was in force for 39 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Sep 8, 2001, 1:21 AM CDT (06:21 UTC)
- Expired
- Sep 8, 2001, 2:00 AM CDT
- In force
- 39 min
- Issued by
- NWS Little Rock, AR
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Johnson County, AR, Logan County, AR
The radar
The Western Arkansas radar (KSRX), 71 km from the middle of the area, began a volume at 06:20 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 8, 1:30 AM CDT | Thunderstorm Wind 50 E | Countywide, AR | Thunderstorm winds knocked down large tree limbs and power lines at several locations across Johnson county. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 8, 1:15 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 6.4 hours before the alert went out and 169 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
- 932 J/kg
- Mixed-layer CIN
- -149 J/kg
- Mixed-layer LCL
- 2014 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 178 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Little Rock, AR wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 7, 9:55 PM CDT, 3 hours 26 minutes earlier.
Area forecast discussion, Sep 7, 9:55 PM CDT, 3 hours 26 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LITTLE ROCK AR 955 PM CDT FRI SEP 7 2001 STRONG SHORTWAVE MOVING FROM SOUTHERN INTO CENTRAL PLAINS AND INTERACTING WITH COLD FRONT TO PRODUCE STRONG TO SEVERE THUNDERSTORMS. STORMS IN AREAS AS CLOSE AS NORTHEAST OKLAHOMA/SOUTHWEST MISSOURI AS OF 930 PM. GOING FORECAST LOOKS GOOD WITH A CHANCE OF THUNDERSTORMS MENTIONED AFTER MIDNIGHT MAINLY IN WESTERN ARKANSAS. APPEARS THAT AS SHORTWAVE PUSHES TO THE NORTH AND AWAY FROM ARKANSAS OVERNIGHT...STORMS WILL HAVE A TENDENCY TO WEAKEN AS THEY HEAD INTO THE STATE. LOOKING FOR ISOLATED SEVERE WEATHER AT BEST OVERNIGHT IN COUNTY WARNING AREA. SEVERE WEATHER MAY BE MORE WIDESPREAD SATURDAY NIGHT/SUNDAY AS YET ANOTHER SHORTWAVE ARRIVES FROM SOUTHERN PLAINS. FRONT WILL HAVE NUDGED INTO ARKANSAS BY THAT TIME...WITH STORMS EXPECTED TO DEVELOP ALONG/AHEAD OF FRONT. FRONT WILL SAG INTO SOUTHEAST ARKANSAS BY SUNDAY NIGHT...WITH CHANCES FOR SHOWERS/THUNDERSTORMS UNTIL FRONT DEPARTS. FRONT WILL BE FOLLOWED BY COOLER/DRIER AIR MONDAY THROUGH WEDNESDAY. (46) .LIT...NONE
The office that day
Everything else NWS Little Rock, AR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 1:21 AM CDT | Severe Thunderstorm Warning | LZK | Scott | 39 min |
| Sep 8, 6:12 PM CDT | Severe Thunderstorm Warning | LZK | Johnson | 53 min |
| Sep 8, 6:47 PM CDT | Severe Thunderstorm Warning | LZK | Scott | 58 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 2001Every severe thunderstorm warning in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.