Alert archive / Oklahoma / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 21
The Storm Prediction Center issued this severe thunderstorm watch at Mar 4, 2004, 7:20 AM CST for 15 counties in Kansas; 29 counties in Oklahoma. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 4, 2004, 7:20 AM CST (13:20 UTC)
- Expired
- Mar 4, 2004, 1:00 PM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 44 counties
Allen County, KS, Anderson County, KS, Bourbon County, KS, Chautauqua County, KS, Cherokee County, KS, Cowley County, KS, Crawford County, KS, Elk County, KS, Labette County, KS, Linn County, KS, Montgomery County, KS, Neosho County, KS, Sumner County, KS, Wilson County, KS, Woodson County, KS, Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Comanche County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, Mayes County, OK, Noble County, OK, Nowata County, OK, Oklahoma County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK
The radar
The Vance AFB radar (KVNX), 88 km from the middle of the area, began a volume at 13:23 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.
Warnings issued inside it
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 4, 7:40 AM CST | Flash Flood Warning | TSA | Osage | 2 hr |
| Mar 4, 8:25 AM CST | Flash Flood Warning | TSA | Nowata, Washington | 4 hr |
| Mar 4, 10:44 AM CST | Flash Flood Warning | OUN | Blaine, Garfield, Grant, Kay, Kingfisher, Noble | 5 hr |
| Mar 4, 10:57 AM CST | Flash Flood Warning | TOP | Anderson, Coffey, Franklin | 4 hr |
| Mar 4, 11:41 AM CST | Flash Flood Warning | ICT | Cowley | 6 hr |
| Mar 4, 11:51 AM CST | Flash Flood Warning | ICT | Woodson | 6 hr |
| Mar 4, 11:53 AM CST | Flash Flood Warning | ICT | Elk | 6 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 1.3 hours before the alert went out and 148 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 441 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 439 m²/s²
- 0-3 km storm-relative helicity
- 531 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 041320
SEL1
SPC WW 041320
KSZ000-OKZ000-041900-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 21
NWS STORM PREDICTION CENTER NORMAN OK
720 AM CST THU MAR 4 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHERN KANSAS
NORTH CENTRAL AND NORTHEAST OKLAHOMA
EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 720 AM UNTIL
100 PM CST.
HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 80 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 70 MILES NORTH NORTHWEST OF FORT
SILL OKLAHOMA TO 50 MILES EAST SOUTHEAST OF CHANUTE KANSAS.
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.
OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 18. WATCH NUMBER 18 WILL NOT BE
IN EFFECT AFTER 720 AM CST. CONTINUE...WW 19...WW 20...
DISCUSSION...ELEVATED THUNDERSTORMS WITH THE POTENTIAL FOR HAIL
EXPECTED TO INCREASE IN COVERAGE ALONG 850 MB WARM FRONT LATER THIS
MORNING AS LOW LEVEL JET STRENGTHENS DOWNSTREAM FROM EJECTING
MEXICAN UPPER VORT.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 21045.
...CORFIDI
364,0985 383,0943 361,0943 342,0985SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 4, 2:44 AM CST | Mesoscale Discussion | SPC | Cowley | 3 hr |
| Mar 4, 7:55 AM CST | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chautauqua, Cherokee and 15 more | 3 hr |
| Mar 4, 1:25 PM CST | Mesoscale Discussion | SPC | Allen, Bourbon, Cherokee, Crawford, Labette, Linn and 2 more | 65 min |
| Mar 4, 2:05 PM CST | Tornado Watch | SPC | Bourbon, Chautauqua, Cherokee, Crawford, Labette, Montgomery and 1 more | 6 hr |
| Mar 4, 1:56 AM CST | Mesoscale Discussion | SPC | Beckham, Caddo, Canadian, Carter, Cleveland, Comanche and 15 more | 94 min |
| Mar 4, 2:00 AM CST | Severe Thunderstorm Watch | SPC | Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 23 more | 5 hr |
| Mar 4, 5:01 AM CST | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 24 more | 119 min |
| Mar 4, 6:55 AM CST | Severe Thunderstorm Watch | SPC | Beckham, Custer, Dewey, Ellis, Greer, Harmon and 6 more | 6 hr |
| Mar 4, 9:28 AM CST | Mesoscale Discussion | SPC | Adair, Atoka, Bryan, Carter, Cherokee, Choctaw and 33 more | 62 min |
| Mar 4, 9:45 AM CST | Tornado Watch | SPC | Caddo, Canadian, Cleveland, Comanche, Cotton, Garvin and 8 more | 5 hr |
| Mar 4, 11:52 AM CST | Mesoscale Discussion | SPC | Carter, Cleveland, Comanche, Cotton, Garvin, Grady and 7 more | 53 min |
| Mar 4, 1:02 PM CST | Mesoscale Discussion | SPC | Caddo, Canadian, Cleveland, Comanche, Cotton, Garvin and 6 more | 88 min |
| Mar 4, 2:02 PM CST | Mesoscale Discussion | SPC | Canadian, Carter, Cleveland, Comanche, Creek, Garvin and 12 more | 88 min |
| Mar 4, 2:18 PM CST | Mesoscale Discussion | SPC | Choctaw, McCurtain | 57 min |
| Mar 4, 3:00 PM CST | Tornado Watch | SPC | Choctaw, McCurtain | 6 hr |
| Mar 4, 4:41 PM CST | Mesoscale Discussion | SPC | McCurtain | 2 hr |
Nearby
Severe Thunderstorm Watches in Oklahoma, 2004Severe Thunderstorm Watches in Kansas, 2004Every severe thunderstorm watch in 2004
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.