Alert archive / Colorado / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 182

April 29, 200312 counties in Colorado; 7 counties in Kansas; Dundy County, Hitchcock County, Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Apr 29, 2003, 3:10 PM MDT for 12 counties in Colorado; 7 counties in Kansas; Dundy County, Hitchcock County, Nebraska. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 29, 2003, 3:10 PM MDT (21:10 UTC)
Expired
Apr 29, 2003, 9:00 PM MDT
In force
6 hr
Issued by
the Storm Prediction Center
All 21 counties

Adams County, CO, Arapahoe County, CO, Cheyenne County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Kit Carson County, CO, Lincoln County, CO, Morgan County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Logan County, KS, Rawlins County, KS, Scott County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Dundy County, NE, Hitchcock County, NE

The radar

The Denver radar (KFTG), 103 km from the middle of the area, began a volume at 21:13 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

26 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 29, 3:48 PM MDTSevere Thunderstorm WarningBOUAdams42 min
Apr 29, 4:15 PM MDTSevere Thunderstorm WarningBOUDouglas45 min
Apr 29, 4:28 PM MDTSevere Thunderstorm WarningBOUAdams32 min
Apr 29, 4:39 PM MDTSevere Thunderstorm WarningBOUWeld66 min
Apr 29, 4:48 PM MDTSevere Thunderstorm WarningBOULincoln57 min
Apr 29, 4:54 PM MDTSevere Thunderstorm WarningGLDKit Carson66 min
Apr 29, 4:55 PM MDTTornado WarningBOULincoln50 min
Apr 29, 4:58 PM MDTSevere Thunderstorm WarningBOUElbert62 min
Apr 29, 5:04 PM MDTSevere Thunderstorm WarningBOUAdams56 min
Apr 29, 5:11 PM MDTSevere Thunderstorm WarningBOUWeld64 min
Apr 29, 5:18 PM MDTSevere Thunderstorm WarningBOUWeld57 min
Apr 29, 5:58 PM MDTSevere Thunderstorm WarningBOUArapahoe, Denver, Douglas47 min
Apr 29, 5:59 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert61 min
Apr 29, 5:59 PM MDTSevere Thunderstorm WarningGLDKit Carson61 min
Apr 29, 6:23 PM MDTSevere Thunderstorm WarningBOUWeld67 min
Apr 29, 6:29 PM MDTSevere Thunderstorm WarningBOUArapahoe, Douglas, Elbert46 min
Apr 29, 6:40 PM MDTSevere Thunderstorm WarningBOUMorgan65 min
Apr 29, 6:42 PM MDTSevere Thunderstorm WarningBOUWeld48 min
Apr 29, 6:59 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe61 min
Apr 29, 7:05 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe, Denver, Douglas, Elbert55 min
Apr 29, 7:08 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe, Denver, Douglas, Elbert52 min
Apr 29, 7:16 PM MDTTornado WarningBOUMorgan44 min
Apr 29, 7:21 PM MDTSevere Thunderstorm WarningBOULogan, Weld54 min
Apr 29, 7:32 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert43 min
Apr 29, 8:00 PM MDTSevere Thunderstorm WarningBOUWashington60 min
Apr 29, 8:29 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert46 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 9.2 hours before the alert went out and 15 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.

Skew-T log-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2003-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 44 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2003-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
44 J/kg
Mixed-layer CIN
-257 J/kg
Mixed-layer LCL
1226 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
127 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS20 KWNS 292105
SEL2  
SPC WW 292110
COZ000-KSZ000-NEZ000-300300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 182 
NWS STORM PREDICTION CENTER NORMAN OK 
410 PM CDT TUE APR 29 2003

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 

       NORTHEAST COLORADO
       NORTHWEST KANSAS
       SOUTHWEST NEBRASKA

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 410 PM UNTIL
1000 PM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 65 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 20 MILES NORTH NORTHWEST OF DENVER
COLORADO TO 45 MILES EAST OF GOODLAND 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...CONTINUE...WW 179...WW 180...WW 181...


DISCUSSION...UPSLOPE BOUNDARY LAYER FLOW WITH MODERATE INSTABILITY
WWD TO FRONT RANGE N OF PALMER DIVIDE.	THUNDERSTORMS EXPECTED TO
INCREASE OVER HIGHER TERRAIN AND MOVE INTO PLAINS.  SHEAR AND
INSTABILITY SUPPORT ISOLATED SUPERCELLS WHICH WILL ENHANCE LARGE
HAIL POTENTIAL.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 25030.


...HALES

405,1050 401,1005 382,1005 390,1050

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 28, 10:50 PM MDTMesoscale DiscussionSPCYuma2 hr
Apr 29, 2:47 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Denver, Elbert, Logan, Morgan and 2 more118 min
Apr 29, 5:16 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Cheyenne, Denver, Douglas, Elbert and 6 more119 min
Apr 28, 6:10 PM MDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Butler, Chase, Chautauqua and 12 more2 hr
Apr 29, 1:15 AM MDTMesoscale DiscussionSPCDecatur, Jewell, Norton, Phillips, Rawlins, Republic and 2 more3 hr
Apr 29, 1:19 PM MDTMesoscale DiscussionSPCCloud, Ellis, Ellsworth, Graham, Jewell, Lincoln and 11 more116 min
Apr 29, 2:40 PM MDTTornado WatchSPCClay, Cloud, Decatur, Dickinson, Ellis, Ellsworth and 19 more5 hr
Apr 29, 4:52 PM MDTMesoscale DiscussionSPCClay, Cloud, Decatur, Dickinson, Ellis, Ellsworth and 19 more53 min

Nearby

Severe Thunderstorm Watches in Colorado, 2003Severe Thunderstorm Watches in Kansas, 2003Severe Thunderstorm Watches in Nebraska, 2003Every severe thunderstorm watch in 2003

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.