Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 27, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 13, 2001, 6:00 PM MST for Pinal County, Arizona. It was in force for 45 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, 6:00 PM MST (01:00 UTC)
- Expired
- Aug 13, 2001, 6:45 PM MST
- In force
- 45 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), 37 km from the middle of the area, began a volume at 01:03 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, 1.0 hours before the alert went out and 135 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.
102 WUUS55 KPSR 140101 SVRPHX AZC021-140145- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 600 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 645 PM MST * AT 6 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 6 MILES NORTHEAST OF FLORENCE JUNCTION...OVER AND JUST EAST OF QUEEN VALLEY. THE STORM WAS NEARLY STATIONARY. 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. 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 3339 11138 3321 11134 3331 11113 3342 11118
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, 2 hours 25 minutes earlier.
Area forecast discussion, Aug 13, 3:35 PM MST, 2 hours 25 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
Local storm report, Aug 13, 1:50 PM MST, 4 hours 10 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, 5:18 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 42 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.