Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 23, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 28, 2001, 1:10 PM MST for Cochise County, Arizona. It was in force for 50 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 28, 2001, 1:10 PM MST (20:10 UTC)
- Expired
- Jul 28, 2001, 2:00 PM MST
- In force
- 50 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Cochise County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 8.2 hours before the alert went out and 107 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
- 145 J/kg
- Mixed-layer CIN
- -222 J/kg
- Mixed-layer LCL
- 1899 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 116 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 282012 SVRTUS AZC003-282100- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 110 PM MST SAT JUL 28 2001 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL COCHISE COUNTY IN ARIZONA * UNTIL 200 PM MST * AT 109 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 9 MILES EAST OF WILLCOX...OR ALONG HIGHWAY 186 NEAR DOS CABEZAS...MOVING NORTHWEST AT 15 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... WILLCOX AT 130 PM MST REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE HAIL...DAMAGING WINDS IN EXCESS OF 55 MPH...DEADLY LIGHTNING...AND HBEAVY RAIN. LAT...LON 3212 10972 3225 10957 3243 10970 3235 11012
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 28, 9:35 AM MST, 3 hours 35 minutes earlier.
Area forecast discussion, Jul 28, 9:35 AM MST, 3 hours 35 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 935 AM MST SAT JUL 28 2001 SYNOPSIS...MOISTURE WILL BE ON A GRADUAL INCREASE THROUGH THE WEEKEND AS HIGH PRESSURE BUILDS FROM NORTHERN ARIZONA INTO THE CENTRAL PLAINS. THIS FLOW PATTERN WILL GUIDE A SERIES OF UPPER LEVEL DISTURBANCES WESTWARD FROM THE GULF OF MEXICO. DISCUSSION...HIGH PRESSURE REORGANIZING WITH ILL DEFINED CENTER BUILDING IN NORTHEAST ARIZONA TODAY. WEAK EASTERLY IMPULSE FOCUSED COMPLEX IN SONORA OVER THE PAST 12 HOUR...NOW SHIFTING TOWARD THE NORTHERN GULF OF CALIFORNIA. NEW HIGH CIRCULATION WRAPPING SLIGHTLY COOLER MID LEVEL AIR INTO THE AREA FROM TRAILING REMAINS OF TROUGH. PRECIPITABLE WATER VALUES STILL IN THE 1.2 TO 1.4 RANGE ACROSS OUR AREA...BUT NOT MUCH FOR THE NORTHERN HALF OF THE STATE. FLOW AND APPARENT ONGOING SURGE TRYING TO EXTEND DEEPER MOISTURE WESTWARD. WIND PROFILE STARTING TO SHOW FAVORABLE VECTORS FOR A LITTLE BETTER ORGANIZATION AND OUTFLOW OFF THE RIM. SHOULD BE A GOOD DAY FOR MOUNTAIN STORMS WITH ENOUGH SUPPORT FOR MORE VALLEY STORMS THAN YESTERDAY...BUT STILL NOT COVERAGE QUITE WHERE WE NORMALLY EXPECT FOR LATE JULY. M .TWC...NONE.
In the hours before
Special weather statement, Jul 28, 11:35 AM MST, 1 hour 35 minutes before
AZZ019-029>035-290700- SOUTHEAST ARIZONA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TUCSON AZ 1135 AM MST SAT JUL 28 2001 .SYNOPSIS...THE FOCUS FOR THUNDERSTORM ACTIVITY TODAY WILL BE ACROSS THE EASTERN PORTIONS OF STATE AS THE MIXTURE OF AMPLE SURFACE HEATING...INCREASED MID LEVEL MOISTURE AND A DESTABILIZING ATMOSPHERE ALOFT WILL AID THUNDERSTORM DEVELOPMENT. EAST OF TUCSON...THERE IS AN INCREASED THREAT OF SEVERE DOWNBURST WINDS IN THE VALLEYS WITH A NEAR CLIMATOLOGICAL THREAT OF FLASH FLOODING. .DISCUSSION...THE MAJORITY OF THE THUNDERSTORM ACTIVITY TODAY WILL OCCUR OVER THE HIGHER TERRAIN ACROSS THE EASTERN PORTIONS OF THE COUNTY WARNING AREA. FIRST OF ALL...UPPER LEVEL NORTHEAST WINDS WILL TRANSPORT COLDER AIR ALOFT WHICH WILL DESTABILIZE THE ATMOSPHERE ACROSS THE REGION. IN ADDITION...AN EASTERLY FLOW AT MID LEVELS WILL TRANSPORT MOISTURE BACK INTO THE EASTERN COUNTIES. COMBINE THESE FACTORS WITH PLENTY OF SUNSHINE TODAY AND YOU HAVE NO PROBLEM DEVELOPING THUNDERSTORMS OVER THE MOUNTAINS. SINCE THE STEERING FLOW IS NORTHEAST AT 15 MPH...STORMS WILL BE ABLE TO PUSH OFF OF THE MOUNTAINS LATE THIS AFTERNOON AND ORGANIZE OVER THE VALLEYS. HOWEVER...THE SPEED OF THE STORMS AND THE FACT THAT DRIER AIR OCCUPIES THE LOWER LEVELS WILL DECREASE THE THREAT OF HEAVY RAIN AND THUS THE THREAT OF FLASH FLOODING. IT WILL HOWEVER INCREASE THE THREAT OF SEVERE STORMS WITH STRONG WINDS BEING THE SIGNIFICANT PLAYER. STORM MOVEMENT WILL BE TO THE SOUTHWEST AT 15 MPH.
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 4:26 PM MST | Flash Flood Warning | TWC | Cochise | 4 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.