Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 26, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 13, 2001, 5:18 PM MST for Pinal County, Arizona. It was in force for 42 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
- Aug 13, 2001, 5:18 PM MST (00:18 UTC)
- Expired
- Aug 13, 2001, 6:00 PM MST
- In force
- 42 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Pinal County, AZ
The radar
The Phoenix radar (KIWA), 44 km from the middle of the area, began a volume at 00:18 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
Tuscon, AZ (KTUS), launched 00:00Z, 0.3 hours before the alert went out and 134 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
- 325 J/kg
- Mixed-layer CIN
- -193 J/kg
- Mixed-layer LCL
- 1957 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
424 WUUS55 KPSR 140023 SVRPHX AZC021-140100- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 518 PM MST MON AUG 13 2001 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME NORTH CENTRAL PINAL COUNTY IN SOUTH CENTRAL ARIZONA * UNTIL 600 PM MST * AT 520 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER EXTREME NORTH CENTRAL PINAL COUNTY... ABOUT 5 MILES NORTHWEST OF SUPERIOR...MOVING SLOWLY EAST AT 5 MPH. DAMAGING MICROBURST WINDS...VERY HEAVY RAIN...AND LARGE HAIL ARE LIKELY WITH THIS DANGEROUS STORM. TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES. THIS STORM WILL LIKELY TRACK JUST NORTH OF ROUTE 60 EAST OF QUEEN VALLEY...AND PASS NEAR SUPERIOR BETWEEN 530 AND 6 PM. 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 3338 11129 3327 11125 3328 11104 3342 11111
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 Aug 13, 3:35 PM MST, 1 hour 43 minutes earlier.
Area forecast discussion, Aug 13, 3:35 PM MST, 1 hour 43 minutes before
AZZ020>028-CAZ030>033-140545- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 335 PM MST MON AUG 13 2001 .SYNOPSIS... A LOW PRESSURE SYSTEM MOVING SLOWLY EAST ACROSS ARIZONA...COMBINED WITH HUMID AIR MEANS SCATTERED SHOWERS AND THUNDERSTORMS TONIGHT INTO TUESDAY...MOSTLY OVER SOUTH-CENTRAL ARIZONA. HIGH PRESSURE ALOFT WILL MOVE FROM OFF SOUTHERN CALIFORNIA EAST OVER ARIZONA DURING MID AND LATE WEEK. THIS WILL RESULT IN HOTTER AND DRIER AIR OVER SOUTHEAST CALIFORNIA AND FAR SOUTHWEST ARIZONA BEGINNING TUESDAY...AND MOST OF SOUTH-CENTRAL ARIZONA BEGINNING WEDNESDAY THROUGH THE END OF THE WEEK. .DISCUSSION... A LOW PRESSURE SYSTEM IS MOVING SLOWLY EAST ACROSS ARIZONA. THE AIRMASS IS VERY HUMID...AND COMBINED WITH DYNAMICS FROM THE LOW PRESSURE SYSTEM...SCATTERED SHOWERS AND THUNDERSTORMS WITH LOCALLY HEAVY RAIN WERE DEVELOPING ESPECIALLY OVER MARICOPA COUNTY AND EAST THIS AFTERNOON...AND THIS IS EXPECTED TO BE THE CASE CONTINUING INTO TONIGHT. A HAZARDOUS WEATHER OUTLOOK WAS ISSUED LATE THIS MORNING FOR LOCALLY HEAVY RAIN...DANGEROUS CLOUD TO GROUND LIGHTNING AND STRONG GUSTY WINDS IN SOUTH-CENTRAL ARIZONA INCLUDING THE PHOENIX AREA THIS AFTERNOON AND TONIGHT. THE LOW PRESSURE SYSTEM WILL MOVE SOUTHEAST OF SOUTH-CENTRAL ARIZONA TUESDAY NIGHT...AND SOUTHEAST OF THE STATE BY WEDNESDAY. ALSO...HIGH PRESSURE ALOFT WILL MOVE FROM OFF SOUTHERN CALIFORNIA EAST OVER ARIZONA DURING MID AND LATE WEEK. THIS WILL RESULT IN HOTTER AND DRIER AIR OVER SOUTHEAST CALIFORNIA AND FAR SOUTHWEST ARIZONA BEGINNING TUESDAY...AND MOST OF SOUTH-CENTRAL ARIZONA BEGINNING WEDNESDAY THROUGH THE END OF THE WEEK. THUS WILL ELIMINATE THE MENTION OF THUNDERSTORMS FOR SOUTHEAST CALIFORNIA AND THE LOWER COLORADO RIVER VALLEY BEGINNING TUESDAY AND ALL OF SOUTH-CENTRAL ARIZONA BEGINNING WEDNESDAY...EXCEPT FOR A SLIGHT CHANCE OF MAINLY LATE AFTERNOON SHOWERS AND THUNDERSTORMS OVER ZONE 24 SOUTHERN GILA COUNTY. THE HIGH PRESSURE CENTER WILL MOVE EAST TO THE ARIZONA-NEW MEXICO BORDER...WITH A CHANCE OF SHOWERS AND THUNDERSTORMS FROM SOUTH-CENTRAL ARIZONA TO SOUTHEAST CALIFORNIA SUNDAY AND MONDAY. ELLIS
In the hours before
Special weather statement, Aug 13, 11:30 AM MST, 5 hours 48 minutes before
AZZ022>024-027-028-140700-
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PHOENIX AZ
1130 AM MST MON AUG 13 2001
...HAZARDOUS WEATHER POSSIBLE OVER SOUTH-CENTRAL ARIZONA THIS
AFTERNOON AND TONIGHT...
COUNTIES IN THE RISK AREA INCLUDE:
IN ARIZONA...MARICOPA...NORTHWEST PINAL...AND SOUTHERN GILA.
THE PRIMARY HAZARDOUS WEATHER RISKS INCLUDE:
LOCALLY HEAVY RAIN...DANGEROUS CLOUD TO GROUND LIGHTNING...AND
STRONG GUSTY WINDS.
STORM SPOTTER ACTIVATION MAY BE NECESSARY LATE THIS AFTERNOON AND
TONIGHT.
CRAIG ELLISLocal storm report, Aug 13, 1:50 PM MST, 3 hours 28 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTION
NATIONAL WEATHER SERVICE PHOENIX AZ
150 PM MST MON AUG 13 2001
TIME(MST) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0215 PM DATELAND AZ WIND DAMAGE
08/12/01 YUMA 16 POWER POLES DOWNED
REPORTED BY UTILITY COThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 6:00 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 45 min |
| Aug 13, 6:07 PM MST | Flash Flood Warning | PSR | Pinal | 53 min |
| Aug 14, 2:36 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 54 min |
| Aug 14, 3:26 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 64 min |
| Aug 14, 3:37 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 53 min |
| Aug 14, 4:25 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 35 min |
| Aug 14, 4:29 PM MST | Severe Thunderstorm Warning | PSR | Gila, Pinal | 51 min |
| Aug 14, 4:59 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 46 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.