Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 353, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jul 28, 2002, 10:01 PM CDT for Harper County, Woods County, Oklahoma. It was in force for 44 min. 3 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 28, 2002, 10:01 PM CDT (03:01 UTC)
- Expired
- Jul 28, 2002, 10:45 PM CDT
- In force
- 44 min
- Issued by
- NWS Norman, OK
- Area
- Counties, with a storm outline in the text
Counties Harper County, OK, Woods County, OK
The radar
The Vance AFB radar (KVNX), 102 km from the middle of the area, began a volume at 03:04 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 28, 10:15 PM CDT | Thunderstorm Wind | Buffalo, OK | Several power poles were downed. |
| Jul 28, 10:15 PM CDT | Thunderstorm Wind | Buffalo, OK | Several power poles were downed. |
| Jul 28, 10:25 PM CDT | Thunderstorm Wind | Buffalo, OK | Several power poles were downed. |
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 |
|---|---|---|---|
| Jul 28, 7:45 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Dodge City, (KDDC), launched 00:00Z, 3.0 hours before the alert went out and 124 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
- 530 J/kg
- Mixed-layer CIN
- -173 J/kg
- Mixed-layer LCL
- 1360 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 264 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.5
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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 28, 9:20 PM CDT, 41 minutes earlier.
Area forecast discussion, Jul 28, 9:20 PM CDT, 41 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORMAN OK 920 PM CDT SUN JUL 28 2002 LINE OF STORMS ACROSS SOUTHERN KANSAS SHOULD CONTINUE TO MOVE SLOWLY THROUGH NORTHERN OK TONIGHT AHEAD OF THE WEAK COLD FRONT. MID-LEVEL ANALYSIS SHOWS THE UPPER TROUGH OVER WESTERN KS AND INTO THE WESTERN TX PANHANDLE. THIS FEATURE SHOULD TRANSLATE ACROSS THE CENTRAL PLAINS TONIGHT HELPING THE LINE OF CONVECTION TO MOVE TOWARDS CENTRAL OK LATE. WITH THE SLOW PROGRESS OF THE LINE POPS IN CENTRAL PART OF OK WILL REMAIN AT 50%...HIGHER TO THE NORTH. THE CURRENT FORECAST REFLECTS THIS. .OUN... OK...NONE. TX...NONE.
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 9:21 PM CDT | Severe Thunderstorm Warning | OUN | Woods | 39 min |
| Jul 28, 10:20 PM CDT | Severe Thunderstorm Warning | OUN | Kay | 40 min |
| Jul 29, 2:01 AM CDT | Severe Thunderstorm Warning | OUN | Custer, Washita | 44 min |
| Jul 29, 2:37 AM CDT | Severe Thunderstorm Warning | OUN | Caddo | 38 min |
| Jul 29, 2:55 AM CDT | Severe Thunderstorm Warning | OUN | Kiowa | 35 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 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.