Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 6, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 3, 2001, 5:53 PM MST for Maricopa County, Arizona. It was in force for 37 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 3, 2001, 5:53 PM MST (00:53 UTC)
- Expired
- Jul 3, 2001, 6:30 PM MST
- In force
- 37 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Maricopa County, AZ
The radar
The Phoenix radar (KIWA), 30 km from the middle of the area, began a volume at 00:55 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.
The nearest sounding before it
Phoenix, AZ (KPSR), launched 00:00Z, 0.9 hours before the alert went out and 18 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3684 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 98 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 KPSR 040054 SVRPHX AZC013-040130- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 553 PM MST TUE JUL 3 2001 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA * UNTIL 630 PM MST * AT 545 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR FOUNTAIN HILLS...MOVING WEST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... SCOTTSDALE AT 610 PM MST PARADISE VALLEY AT 620 PM MST PHOENIX AT 630 PM MST THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN PHOENIX. LAT...LON 3343 11164 3366 11163 3373 11208 3339 11210
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 Phoenix, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 3, 4:05 PM MST, 1 hour 48 minutes earlier.
Area forecast discussion, Jul 3, 4:05 PM MST, 1 hour 48 minutes before
AZZ020>028-CAZ030>033-040545- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 405 PM MST TUE JUL 3 2001 .SYNOPSIS... A LARGE HIGH PRESSURE SYSTEM ALOFT...CENTERED OVER THE GREAT BASIN ...WILL DRIFT SLOWLY EASTWARD THIS WEEK. THIS WILL RESULT IN SOUTHEASTERLY WIND FLOW BRINGING MORE MOISTURE TO BOTH SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA. A CORRESPONDING INCREASE IN THUNDERSTORM POTENTIAL CAN BE EXPECTED...AS THE AIR BECOMES MORE MOIST. IT WILL...HOWEVER...TEND TO MODERATE THE DAYTIME TEMPERATURES DOWN TO MORE NORMAL LEVELS BY MID WEEK. .DISCUSSION... AFTERNOON CONVECTION TAKING A SOMEWHAT UNUSUAL PATTEN WITH MORE ACTIVITY OVER YAVAPAI AND MOHAVE COUNTIES THAN IN SOUTHEAST ARIZONA. MEANWHILE ZONE 28 GETTING DOWNBURST STORMS DESPITE MODEST APPEARANCE ON RADAR. LARGE STORM NORTH OF ZONE 24 A LATE BLOOMER WHICH MAY HELP TO BRING STORM THREAT TO PHOENIX METRO AREA. ZONE 21 HAS A BETTER THREAT GIVEN YAVAPAI/MOHAVE ACTIVITY AND STEERING FLOW. WITH APPROACHING INVERTED TROUGH AND SHIFT TO SOUTHEASTERLY FLOW... LOW LEVEL MOISTURE AND THUNDERSTORM ACTIVITY OVER THE CWA WILL BE ON THE INCREASE. TEMPS WILL BE ON THE DECREASE BUT EXPECT TOMORROW TO STILL BE QUITE WARM WITH MORE COOLING THURSDAY. TONIGHTS STORMS WILL BE STRICTLY WIND PRODUCERS...BUT BY THURSDAY THEY WILL TRANSITION TO PRECIP PRODUCERS. WITH MORE CAPE THOUGH THERE WILL STILL BE SEVERE WIND THREAT WITH SOME OF THE STORMS THURSDAY. IN THE EXTENDED...MRF AND ECMWF SHOW WESTERLIES TRYING TO INTRUDE FOR DRYING FROM THE WEST. ONLY WESTERN ZONES ARE LIKELY TO DRY OUT. HOWEVER...IN THE LATTER PART OF THE EXTENDED...THE HIGH CENTER SHIFTS WESTWARD WHICH MIGHT LEAD TO REINTRODUCTION OF MOISTURE INTO WESTERN CWA BY TUESDAY. NOT CONFIDENT ENOUGH IN THAT SCENARIO TO REINTRODUCE STORM POSSIBILITIES. JAMISON
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 7:59 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 61 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; radar from the NEXRAD Level II archive.