Alert archive / New Mexico / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 721
The Storm Prediction Center issued this severe thunderstorm watch at Jul 11, 2003, 11:35 AM MST for Cochise County, Graham County, Greenlee County, Arizona; 7 counties in New Mexico. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 11, 2003, 11:35 AM MST (18:35 UTC)
- Expired
- Jul 11, 2003, 5:00 PM MST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
Counties Cochise County, AZ, Graham County, AZ, Greenlee County, AZ, Doña Ana County, NM, Grant County, NM, Hidalgo County, NM, Lincoln County, NM, Luna County, NM, Otero County, NM, Sierra County, NM
The radar
The El Paso radar (KEPZ), 210 km from the middle of the area, began a volume at 18:34 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.
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Santa Teresa, NM (KEPZ), launched 12:00Z, 6.6 hours before the alert went out and 211 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
- 157 J/kg
- Mixed-layer CIN
- -219 J/kg
- Mixed-layer LCL
- 2604 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 111835
SEL1
SPC WW 111835
AZZ000-NMZ000-120000-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 721
NWS STORM PREDICTION CENTER NORMAN OK
1235 PM MDT FRI JUL 11 2003
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHEASTERN ARIZONA
SOUTHWESTERN NEW MEXICO
EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 1235 PM UNTIL 600
PM MDT.
HAIL TO 1.5 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 70 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 50 MILES EAST NORTHEAST OF
ALAMOGORDO NEW MEXICO TO 75 MILES WEST SOUTHWEST OF SAFFORD
ARIZONA.
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 720...
DISCUSSION...THUNDERSTORMS ARE DEVELOPING OVER THE MOUNTAINS AND ARE
EXPECTED TO MOVE WEST-SOUTHWESTWARD INTO THE DESERT AREAS DURING THE
AFTERNOON. MODERATE INSTABILITY AND DEEP MIXED BOUNDARY LAYER WILL
BE FAVORABLE FOR DAMAGING WINDS.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 06015.
...IMY
320,1051 312,1104 332,1104 340,1051SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 10:37 AM MST | Mesoscale Discussion | SPC | Cochise, Graham, Greenlee | 113 min |
| Jul 11, 3:33 PM MST | Mesoscale Discussion | SPC | Cochise, Graham, Greenlee, Santa Cruz | 87 min |
| Jul 11, 12:01 PM MST | Mesoscale Discussion | SPC | Colfax, Guadalupe, Harding, Los Alamos, Mora, Quay and 4 more | 119 min |
| Jul 11, 2:38 PM MST | Mesoscale Discussion | SPC | Colfax, Curry, De Baca, Guadalupe, Harding, Mora and 4 more | 97 min |
| Jul 11, 3:25 PM MST | Severe Thunderstorm Watch | SPC | Curry, De Baca, Quay, Roosevelt | 6 hr |
Nearby
Severe Thunderstorm Watches in New Mexico, 2003Severe Thunderstorm Watches in Arizona, 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.