Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 47, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at May 16, 2002, 7:38 PM CDT for Cimarron County, Oklahoma. It was in force for 52 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 16, 2002, 7:38 PM CDT (00:38 UTC)
- Expired
- May 16, 2002, 8:30 PM CDT
- In force
- 52 min
- Issued by
- NWS Amarillo, TX
- Area
- Counties, with a storm outline in the text
County Cimarron County, OK
The radar
The Amarillo radar (KAMA), 197 km from the middle of the area, began a volume at 00:40 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 |
|---|---|---|---|
| May 16, 8:15 PM CDT | Hail 1.25 | Boise City, OK | |
| May 16, 8:35 PM CDT | Hail 2.5 | Keyes, OK |
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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 16, 5:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 00:00Z, 0.6 hours before the alert went out and 197 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
- 570 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 2934 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
158 WUUS54 KAMA 170038 SVRAMA OKC025-170130- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AMARILLO TX 735 PM CDT THU MAY 16 2002 THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CIMARRON COUNTY IN THE OKLAHOMA PANHANDLE * UNTIL 830 PM CDT * AT 735 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 17 MILES NORTHWEST OF BOISE CITY...MOVING SOUTHEAST AT 20 MPH. * SOME LOCATIONS AFFECTED BY THE STORM INCLUDE... KEYES HAIL UP TO GOLFBALLS CAN BE EXPECTED WITH THIS STORM. TAKE COVER NOW GO TO THE LOWEST FLOOR OF A STURDY BUILDING AND AVOID WINDOWS LAT...LON 3700 10278 3682 10280 3663 10204 3699 10203
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 Amarillo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 16, 3:50 PM CDT, 3 hours 48 minutes earlier.
Area forecast discussion, May 16, 3:50 PM CDT, 3 hours 48 minutes before
TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION NATIONAL WEATHER SERVICE AMARILLO TX 350 PM CDT THU MAY 16 2002 SLOW-MOVING COLD FRONT EXTENDED WEST TO EAST ACROSS OUR SOUTHERN FORECAST AREA BORDER. EXPECT THUNDERSTORMS TO DEVELOP ALONG AND NORTH. SOME SEVERE DUE TO INCREASED MOISTURE CONVERGENCE AND UPPER LEVEL DYNAMICS. COLD FRONT CONTINUES TO PUSH SOUTH OVERNIGHT. STRONG PRESSURE GRADIENT SHOULD RESULT IN STRONGER SURFACE WINDS LATER TONIGHT INTO EARLY FRIDAY. SUBSTANTIAL MOISTURE PERSISTS WITHIN UPSLOPE FLOW...SO WELL KEEP GENEROUS CLOUD COVER THROUGH AT LEAST SATURDAY. DAYTIME TEMPERATURES WILL BE COOLED AT LEAST A CATEGORY FROM PREVIOUS FORECAST. NO SIGNIFICANT CHANGES TO THE REMAINDER OF THE FORECAST. FCSTR ID=08 AMA 053/066/043/070 3211 DHT 049/065/044/072 4111= .AMA... OK...NONE. TX...NONE.
In the hours before
Special weather statement, May 16, 5:30 PM CDT, 2 hours 8 minutes before
OKZ001>003-TXZ001>010-170400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 530 PM CDT THU MAY 16 2002 THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH NUMBER 306 FOR THE FOLLOWING COUNTIES IN THE OKLAHOMA PANHANDLE ...CIMARRON...TEXAS...BEAVER...IN THE TEXAS PANHANDLE...DALLAM... SHERMAN...HANSFORD...OCHILTREE...LIPSCOMB...HARTLEY...MOORE... HUTCHINSON...ROBERTS...AND HEMPHILL. THE SEVERE THUNDERSTORM WATCH WILL BE IN EFFECT UNTIL 11 PM CDT. ANDRADE
The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 7:32 PM CDT | Severe Thunderstorm Warning | AMA | Texas | 58 min |
| May 16, 8:35 PM CDT | Severe Thunderstorm Warning | AMA | Cimarron, Texas | 40 min |
| May 16, 9:09 PM CDT | Severe Thunderstorm Warning | AMA | Texas | 51 min |
| May 16, 9:12 PM CDT | Severe Thunderstorm Warning | AMA | Texas | 48 min |
| May 16, 9:39 PM CDT | Severe Thunderstorm Warning | AMA | Texas | 51 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.