Alert archive / Arkansas / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 241, NWS Little Rock, AR
NWS Little Rock, AR issued this severe thunderstorm warning at Jul 18, 2002, 3:58 PM CDT for 6 counties in Arkansas. It was in force for 62 min. 4 reports 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
- Jul 18, 2002, 3:58 PM CDT (20:58 UTC)
- Expired
- Jul 18, 2002, 5:00 PM CDT
- In force
- 62 min
- Issued by
- NWS Little Rock, AR
- Area
- Counties, with a storm outline in the text
Counties Baxter County, AR, Boone County, AR, Marion County, AR, Newton County, AR, Searcy County, AR, Stone County, AR
The radar
The Springfield radar (KSGF), 142 km from the middle of the area, began a volume at 20:58 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 |
|---|---|---|---|
| Jul 18, 4:00 PM CDT | Thunderstorm Wind 50 E | Whiteville, AR | A large tree was blown down. |
| Jul 18, 4:40 PM CDT | Thunderstorm Wind 50 E | Hasty, AR | Thunderstorm winds downed some large tree limbs. |
| Jul 18, 4:40 PM CDT | Thunderstorm Wind 50 E | Fifty Six, AR | A large tree was blown down. |
| Jul 18, 4:45 PM CDT | Thunderstorm Wind 50 E | Marshall, AR | Thunderstorm winds blew down some large tree limbs. |
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 nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 9.0 hours before the alert went out and 133 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
- 2076 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 601 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 134 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.5
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 Jul 18, 3:41 PM CDT, 17 minutes earlier.
Area forecast discussion, Jul 18, 3:41 PM CDT, 17 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LITTLE ROCK AR 341 PM CDT THU JUL 18 2002 MAIN CONCERN IS PRECIPITATION CHANCES. AFTER A RAIN FILLED MORNING...SHOWERS AND THUNDERSTORMS HAVE REDEVELOPED. A LARGE COMPLEX OF STORMS LOCATED FROM SOUTHERN MISSOURI TO NORTHEAST OKLAHOMA...ASSOCIATED WITH THE UPPER LEVEL TROUGH...IS MOVING INTO NORTH ARKANSAS. THE UPPER LEVEL TROUGH WILL SLOWLY MOVE SOUTHEAST THROUGH SATURDAY. THIS WILL BRING THE BEST CHANCE OF SHOWERS AND THUNDERSTORMS TO THE NORTHEAST PORTION OF THE CWFA. MODELS ARE IN SIMILAR AGREEMENT WITH THE AVN SHOWING HIGHER MOISTURE VALUES. I WILL TEND TOWARD THE DRIER ETA MODEL. THE MOISTURE WILL MOVE OFF TO THE EAST SATURDAY NIGHT INTO SUNDAY. SUNDAY AND MONDAY LOOK TO BE DRIER AS HIGH PRESSURE BUILDS IN OVER THE AREA. ANOTHER TROUGH WILL MOVE IN ON NORTHWEST FLOW ON TUESDAY AND BRING ADDITIONAL MOISTURE AND A CHANCE OF SHOWERS AND THUNDERSTORMS. THIS CHANCE WILL LAST INTO WEDNESDAY AND THURSDAY WITH SEVERAL SHORT WAVES MOVING THROUGH THE AREA. TEMPERATURES WILL BE SLOW TO WARM UP WITH ALL THE MOISTURE IN THE GROUND AND IN THE AIR. SOME DRYING (THIS WEEKEND) WILL BE NEEDED BEFORE HIGH TEMPERATURES CAN GET INTO THE UPPER 90S. IN THE SHORT TERM HIGH TEMPERATURES WILL BE CLOSER TO THE MAV TEMPERATURES. .LZK...NONE. 51
In the hours before
Local storm report, Jul 18, 3:53 PM CDT, 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
353 PM CDT THU JUL 18 2002
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0340 PM 3 N LEAD HILL AR 60 MPH TSTM GUST
07/18/02 BOONE LARGE LIMBS DOWN AND
HEAVY RAIN AT DIAMOND
CITY. REPORTED BY LAW
ENFORCEMENT OFFICIAL.
28The office that day
Everything else NWS Little Rock, AR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 10:09 AM CDT | Flash Flood Warning | LZK | Johnson, Pope, Van Buren | 3 hr |
| Jul 18, 3:06 PM CDT | Severe Thunderstorm Warning | LZK | Baxter, Boone, Marion | 54 min |
| Jul 18, 4:07 PM CDT | Severe Thunderstorm Warning | LZK | Yell | 38 min |
| Jul 18, 4:33 PM CDT | Severe Thunderstorm Warning | LZK | Izard | 57 min |
| Jul 18, 6:42 PM CDT | Severe Thunderstorm Warning | LZK | White | 48 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 2002Every severe thunderstorm warning in 2002
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.