Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 12, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 5, 2001, 12:10 PM MST for Pima County, Arizona. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Jul 5, 2001, 12:10 PM MST (19:10 UTC)
- Expired
- Jul 5, 2001, 12:45 PM MST
- In force
- 35 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Pima County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 7.2 hours before the alert went out and 14 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
- 1608 J/kg
- Mixed-layer CIN
- -105 J/kg
- Mixed-layer LCL
- 1266 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 166 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KTWC 051910 SVRTUS AZC019-051945- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 1210 PM MST THU JUL 5 2001 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL PIMA COUNTY IN ARIZONA THIS INCLUDES THE SOUTHERN PART OF TUCSON * UNTIL 1245 PM MST * AT 1156 AM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM ABOUT 5 MILE SOUTH OF TUCSON INTERNATIONAL AIRPORT. MOVEMENT OF THE STORM IS TO THE NORTHWEST AROUND 20 MPH. THIS STORM WILL AFFECT AREAS AROUND THE AIRPORT AND SOUTH TUCSON. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE HAIL...DArMAGING WINDS IN EXCESS OF 55 MPH...DEADLY LIGHTNING...AND HEAVY RAIN. LAT...LON 3214 11112 3201 11104 3202 11085 3216 11094 GLUECK
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 Tucson, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 5, 9:25 AM MST, 2 hours 45 minutes earlier.
Area forecast discussion, Jul 5, 9:25 AM MST, 2 hours 45 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 925 AM MST THU JUL 5 2001 SYNOPSIS...ISOLATED TO SCATTERED THUNDERSTORMS WILL CONTINUE FOR THE REMAINDER OF THE WEEK AND INTO THE WEEKEND. HIGH PRESSURE TO OUR NORTH AND NORTHEAST WILL GUIDE DEEPER MOISTURE INTO SOUTHEAST ARIZONA...WITH THUNDERSTORM COVERAGE AND THE THREAT OF HEAVY RAIN INCREASING. DISCUSSION...TSTMS CONTINUE ALONG MEX BORDER IN SOUTHWEST AZ DUE TO TROF ON THE BAJA AND LOW LEVEL CONVERGENCE. SHOULD SEE TSTMS DECREASE NEXT HOUR OR SO AND SHIFT OFF TO THE NORTHWEST. MOISTURE CONTINUES TO DEEPEN OVER THE AREA AS HIGH SHIFTS SLOWLY EAST. BY LATER AFTERNOON WITH HEATING AND GOOD MOISTURE PROFILE ALONG WITH STRONG UPPER DIVERGENCE SHOULD SEE MORE WIDESPREAD TSTMS. ALSO MID/UPPER LEVEL WINDS ARE VEERING AND WEAKENING DURING THE DAY AND TSTMS WILL BE SLOWER AND HEAVIER RAIN PRODUCERS. MODIFIED TUS SOUNDING SHOWS VERY UNSTABLE ATMOSPHERE THIS AFTN. LOOK FOR AN ACTIVE LATE AFTERNOON AND EVENING THRU THE ENTIRE AREA BUT BEST TSTMS SHOULD BE FROM WESTERN COCHISE CTY TO THE WESTERN END OF THE STATE IN BEST MOISTURE AND UPPER DIVERGENCE. .TWC...NONE. m
In the hours before
Special weather statement, Jul 5, 12:09 PM MST, 1 minute before
AZZ019-029>035-050700- SOUTHEAST ARIZONA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TUCSON AZ 1205 AM MST THU JUL 5 2001 .SYNOPSIS... A MOISTURE INFLUX FROM THE SOUTH IS HELPING INITIATE THE THUNDERSTORM ACTIVITY ACROSS THE COUNTY WARNING AREA. WITH SLOWER WINDS ALOFT THE POTENTIAL FOR TRAINING OF STORMS AND FLASH FLOODING HAS INCREASED. .DISCUSSION...LOW LEVEL MOISTURE SURGED INTO THE AREA WITH THE 12Z TUS SOUNDING HAVING PWAT VALUE OF 1.47. THUNDERSTORMS HAVE ALREADY ERUPTED ACROSS WEST CENTRAL PIMA COUNTY THROUGH WESTERN COCHISE COUNTY. TRAINING OF THESE STORMS IS LIKELY WITH THE SLOWER WINDS ALOFT. FLASH FLOOD THREAT WILL BE HIGHEST FROM EASTERN- PIMA COUNTY TO CENTRAL COCHISE COUNTY. THE SEVERE WEATHER THREAT WILL ALSO BE HIGH IN THIS SAME LOCATION. STORM MOTION WILL BE TOWARDS THE NORTHWEST AT 15 MPH.
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 9:55 AM MST | Flash Flood Warning | TWC | Pima | 20 min |
| Jul 5, 11:18 AM MST | Flash Flood Warning | TWC | Pima | 12 min |
| Jul 5, 11:45 AM MST | Flash Flood Warning | TWC | Pima | 30 min |
| Jul 5, 12:35 PM MST | Flash Flood Warning | TWC | Pima | |
| Jul 5, 1:55 PM MST | Flash Flood Warning | TWC | Cochise | 35 min |
| Jul 5, 1:55 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 65 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2001Every severe thunderstorm warning in 2001
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.