Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 18, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 14, 2001, 1:42 PM MST for Pima County, Arizona. It was in force for 48 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 14, 2001, 1:42 PM MST (20:42 UTC)
- Expired
- Jul 14, 2001, 2:30 PM MST
- In force
- 48 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, 8.7 hours before the alert went out and 24 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
- 182 J/kg
- Mixed-layer CIN
- -217 J/kg
- Mixed-layer LCL
- 2703 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- -27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KTWC 142044 SVRTUS AZC019-142130- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 142 PM MST SAT JUL 14 2001 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL PIMA COUNTY IN ARIZONA THIS INCLUDES GREEN VALLEY AND FAR SOUTHERN TUCSON * UNTIL 230 PM MST * AT 140 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES NORTH OF GREEN VALLEY ALONG INTERSTATE 19...MOVING NORTHEAST AT 6 TO 8 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... SOUTHERN TUCSON AT 215 PM MST REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE HAIL...DAMAGING WINDS IN EXCESS OF 55 MPH...DEADLY LIGHTNING...AND HEAVY RAIN. LAT...LON 3194 11110 3179 11098 3195 11063 3216 11080
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 14, 9:30 AM MST, 4 hours 12 minutes earlier.
Area forecast discussion, Jul 14, 9:30 AM MST, 4 hours 12 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 930 AM MST SAT JUL 14 2001 SYNOPSIS...A TROUGH OF LOW PRESSURE WILL REMAIN STATIONARY ALONG THE WEST COAST FOR THE NEXT WEEK. THIS WILL BRING A LITTLE DRIER SOUTHWEST FLOW OVER MUCH OF THE REGION. HIGH PRESSURE WILL REMAIN NEARLY STATIONARY IN NEW MEXICO WHICH WILL CONTINUE TO PUSH SOME MOISTURE INTO FAR EASTERN ARIZONA. LOOK FOR TEMPERATURES TO REMAIN NEAR OR SLIGHTLY ABOVE NORMAL AND ONLY A SMALL CHANCE OF THUNDERSTORMS. DISCUSSION...MORE COMPLICATED WEATHER PATTERN IN PLACE TODAY...WITH A LOW PRESSURE SYSTEM OVER NORTHERN CALIFORNIA AND AN UPPER LOW OVER SOUTHWEST TEXAS. MOISTURE ACROSS THE STATE WAS STARTING TO PINCH OFF WITH DRIER AIR OVER NEW MEXICO AND A DRY SOUTHWESTERLY FLOW ALOFT STARTING TO MERGE. LATEST SATELLITE WATER VAPOR AND PWATER IMAGERY INDICATED THAT THE DEEPEST MOISTURE HAD SHIFTED FARTHER EAST INTO OUR EXTREME EASTERN ZONES AND FAR WESTERN NEW MEXICO. IR AND VISIBLE IMAGERY WAS STILL SHOWING A NARROW CLOUD BAND EXTENDED ACROSS EASTERN SANTA CRUZ...COCHISE...INTO GRAHAM AND GREENLEE COUNTIES THIS MORNING. CURRENT THINKING IS THAT MOST OF THE THUNDERSTORM ACTIVITY WILL BE CONFINED TO OUR EASTERN ZONES AGAIN TODAY. THE ONLY CONCERN WOULD BE SOME DIFFERENTIAL HEATING ALONG THE WESTERN AND EASTERN EDGES OF THE CLOUD BAND THAT COULD TRIGGER STORMS A LITTLE FARTHER WEST LATER TODAY. HOWEVER...THJE STRONG SOUTHWESTERLY FLOW ALOFT SHOULD INHIBIT CONVECTION FROM TUCSON WESTWARD. WILL MAKE MINOR ADJUSTMENTS TO THE CURRENT FORECAST ON THE MORNING UPDATE. .TWC...NONE.
In the hours before
Special weather statement, Jul 14, 11:45 AM MST, 1 hour 57 minutes before
AZZ019-029>035-150700- SOUTHEAST ARIZONA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TUCSON AZ 1145 AM MST SAT JUL 14 2001 .SYNOPSIS...DRIER AIR HAS STARTED TO WORK ITS WAY INTO WESTERN PORTIONS OF SOUTHERN ARIZONA...ESPECIALLY IN THE MID LEVELS. DEEPER MOISTURE CONTINUES ACROSS EASTERN PORTIONS OF THE FORECAST AREA. AGAIN THE HIGHER TERRAIN WILL PROVIDE THE FOCUSING MECHANISM TO SPARK THUNDERSTORM DEVELOPMENT. WITH LESS OVERALL MOISTURE TO WORK WITH...AND HIGHER WINDS ALOFT THE THREAT OF FLASH FLOODING WILL BE NEAR CLIMATOLOGY ACROSS ALL OF SOUTHERN ARIZONA. WITH SOUTHWEST FLOW AT MID AND UPPER LEVELS PULLING IN DRIER AIR ALOFT...THE THREAT OF SEVERE WEATHER IS LOW. .DISCUSSION...LOOK FOR THUNDERSTORMS TO DEVELOP OVER THE HIGHER TERRAIN DURING THE AFTERNOON HOURS...MAINLY FROM TUCSON EAST. THE MORNING TUCSON UPPER AIR SOUNDING INDICATED SOMEWHAT DRIER AIR IN PLACE COMPARED TO YESTERDAY...WITH A PRECIPITABLE WATER VALUE OF 1.23 INCHES. MID LEVEL STEERING FLOW IS STRONG ENOUGH FOR THE STORMS TO MOVE OFF THE MOUNTAINS AND INTO THE VALLEYS...HOWEVER THE STRONGER FLOW WILL REDUCE THE THREAT OF FLASH FLOODING TO NEAR CLIMATOLOGY ACROSS ALL OF SOUTHERN ARIZONA EXCEPT FAR EASTERN PORTIONS WHERE DEEPER MOISTURE REMAINS. THE THREAT OF SEVERE THUNDERSTORMS WILL BE NEAR CLIMATOLOGY TODAY OVER A GOOD PORTION OF SOUTHEAST ARIZONA...WITH A BELOW NORMAL THREAT OVER FAR WESTERN PIMA COUNTY. THE HIGHEST THREAT OF SEVERE WEATHER WILL BE OVER EASTERN PORTIONS OF SOUTHEAST ARIZONA (FAR EASTERN PIMA...COCHISE AND GRAHAM COUNTIES) WHERE DIFFERENTIAL HEATING DUE TO MORNING CLOUDS AND THE BOUNDARY BETWEEN DRIER AND MORE MOIST AIR EXISTS. STORM MOTION WILL BE TOWARDS THE NORTHEAST AT 10 MPH. ZELL
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 5:27 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 48 min |
| Jul 14, 2:42 PM MST | Severe Thunderstorm Warning | TWC | Graham, Pima | 48 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.