Alert archive / Arizona / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 37, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 11, 2000, 3:27 PM MST for Maricopa County, Arizona. It was in force for 63 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 11, 2000, 3:27 PM MST (22:27 UTC)
- Expired
- Aug 11, 2000, 4:30 PM MST
- In force
- 63 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Maricopa County, AZ
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 11, 4:29 PM MST | Thunderstorm Wind 60 E | Mesa, AZ | Severe thunderstorm winds tore part of the roof off a boat house on Apache Lake. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Phoenix, AZ (KPSR), launched 12:00Z, 10.5 hours before the alert went out and 49 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
- 260 J/kg
- Mixed-layer CIN
- -232 J/kg
- Mixed-layer LCL
- 2605 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KPSR 112226 SVRPHX AZC013-112330- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 327 PM MST FRI AUG 11 2000 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN MARICOPA COUNTY IN CENTRAL ARIZONA * UNTIL 430 PM MST * AT 325 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES NORTH OF TORTILLA FLAT...MOVING SOUTH AT 10 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT OR PASS CLOSE TO... TORTILLA FLAT SAGUARO LAKE APACHE LAKE THE APACHE TRAIL DAMAGING WINDS AND HEAVY RAIN ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY qFROM WINDOWS. BOATERS ARE URGED TO EXERCISE EXTREME CAUTION AND TO GO TO SHORE IF THREATENING WEATHER APPROACHES. DG
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 11, 2:35 PM MST, 52 minutes earlier.
Area forecast discussion, Aug 11, 2:35 PM MST, 52 minutes before
AZZ020>028-CAZ030>033-120545- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 235 PM MST FRI AUG 11 2000 .SYNOPSIS... A STATIONARY UPPER LEVEL DISTURBANCE DRAPED ACROSS ARIZONA WILL AFFECT THE SOUTH CENTRAL AND SOUTHWEST PORTIONS THE NEXT COUPLE OF DAYS. THIS IMPULSE WILL HELP TO TRIGGER THUNDERSTORMS...FIRST ALONG THE HIGHER TERRAIN...WITH STEERING FLOWS HELPING TO MOVE THE STORMS SOUTHWEST INTO THE LOWER DESERTS IN THE EVENINGS. MEANWHILE...HIGH PRESSURE ALOFT WILL DRIFT NORTHWARD THE NEXT FEW DAYS AND WILL HELP TO IMPORT ADDITIONAL MOISTURE INTO THE STATE. BY EARLY NEXT WEEK... SUFFICIENT FLOW WILL BE PRESENT TO GIVE A THREAT OF AFTERNOON AND EVENING THUNDERSTORMS ALL THE WAY INTO SOUTHEAST CALIFORNIA. .DISCUSSION... NEW 18Z MESO-ETA CONTINUES TO ADVERTIZE PRESENCE OF INVERTED VORT TROF DRAPED NE-SW ACROSS AZ. THIS FEATURE GAVE CONSIDERABLE MID LEVEL CONVERGENCE EARLIER TODAY...AS NOTED BY PERSISTENT LINE OF SHOWERS AND THUNDERSTORMS NEAR ITS VICINITY. BELIEVE THIS FEATURE WAS ALSO HELPING TO TRIGGER LARGE MCS ALONG AZ/MEX BORDER THIS AFTERNOON. MEANWHILE...MESO-ETA...ET AL...IS CONTINUING TO FORECAST FAVORABLE STEERING WINDS TO HELP PROPOGATE STORMS OFF THE RIM INTO THE HIGH THETA-E AIRMASS NOW IN PLACE OVER THE DESERTS TONIGHT. RADAR VWP AND SATELLITE TRENDS ALSO SEEM TO BE BEARING THIS FAVORABLE MOTION OUT. SO...WENT WITH RELATIVELY HIGH POPS TONIGHT FOR PHX...40 PCT...AND ALSO ISSUED A HAZARDOUS WEATHER OUTLOOK...MAINLY FOR HEAVY RAIN... OVER MARICOPA...GILA AND PINAL PORTIONS OF CWFA. AFTER TONIGHT... AMOUNT OF CONVECTION WILL DEPEND ON DEBRIS CLOUD SHIELDS...HOW MUCH INSTABILITY IS RELEASED...AS WELL AS IF WE CAN KEEP THE NELY STEERING FLOW. ANOTHER POSSIBLE PLAYER IN WEEKEND CONVECTION WILL BE WHETHER WE CAN GET A SURGE TONIGHT FROM THE BORDER MCS...WHICH CONTINUES TO PROPOGATE WWD...PERHAPS ENDING UP OUT OVER NRN GULF?? WILL OPT TO KEEP LOW GRADE SCT POPS IN PLACE OVER DESERTS AFTER TONIGHT...MAINLY IN THE EVENING...AND TAKE THREAT ALL THE WAY TO RIVER AND FAR SE CA BY SATURDAY NIGHT. DURING THE EXTENDED...H5 RIDGE AXIS SETS UP TO OUR N...OPENING THE DOOR FOR ELY FLOW TO MAKE IT ALL THE WAY INTO WRN CWFA. HAVE DECIDED TO INCLUDE CHANCE OF TSTMS ALL THE WAY OUT INTO CA ZONES DURING 3 TO 5 DAY PERIOD. ESTLE
In the hours before
Special weather statement, Aug 11, 11:40 AM MST, 3 hours 47 minutes before
AZZ022>024-027-028-120130- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 1140 AM MST FRI AUG 11 2000 A MODERATE RISK OF THUNDERSTORMS WITH LOCALLY HEAVY RAIN OVER MUCH OF SOUTH CENTRAL ARIZONA LATER THIS AFTERNOON AND EVENING... THE MODERATE RISK AREA INCLUDES ALL OF MARICOPA COUNTY AS WELL AS SOUTHERN GILA AND NORTHWEST PINAL COUNTIES. THIS INCLUDES THE GREATER PHOENIX AREA...AS WELL AS CASA GRANDE...COOLIDGE...GLOBE ...MIAMI...WICKENBURG AND GILA BEND. AN UPPER LEVEL DISTURBANCE OVER EASTERN ARIZONA WILL SERVE TO ACT AS A TRIGGER FOR SCATTERED SHOWERS AND THUNDERSTORMS OVER THE MODERATE RISK AREA THIS AFTERNOON AND EVENING. LOCALIZED RAINFALL AMOUNTS OF OVER AN INCH PER HOUR ARE POSSIBLE. IN ADDITION...GUSTY WINDS TO OVER 40 MPH ARE LIKELY...WHICH COULD LEAD TO AREAS OF REDUCED VISIBILITIES IN BLOWING DUST IN THE DESERTS. STORM SPOTTER ACTIVATION MAY BE NECESSARY LATER TODAY. ESTLEc
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 4:17 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 43 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2000Every severe thunderstorm warning in 2000
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.