Alert archive / Arizona / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 59, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Oct 4, 2000, 7:29 AM MST for Maricopa County, Arizona. It was in force for 31 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
- Oct 4, 2000, 7:29 AM MST (14:29 UTC)
- Expired
- Oct 4, 2000, 8:00 AM MST
- In force
- 31 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Maricopa County, AZ
The radar
The Phoenix radar (KIWA), 77 km from the middle of the area, began a volume at 14:32 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 4, 7:30 AM MST | Thunderstorm Wind | Phoenix, AZ | Thunderstorms developed over a large area of the metropolitan area. Lightning struck the towers on Mummy Mountain and knocked out the Paradise Valley Police Department communication system.Lightning was also blamed on causing a house fire on 35th Avenue an |
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
Tuscon, AZ (KTUS), launched 12:00Z, 2.5 hours before the alert went out and 198 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
- 69 J/kg
- Mixed-layer CIN
- -278 J/kg
- Mixed-layer LCL
- 2167 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KPSR 041429 SVRPHX AZC013-041500- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 729 AM MST WED OCT 4 2000 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL MARICOPA COUNTY IN CENTRAL ARIZONA * UNTIL 800 AM MST * AT 730 AM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM EAST PHOENIX...SCOTTSDALE... MOVING NORTHEAST AT 25 MPH.... * THE SEVERE THUNDERSTORM WILL AFFECT... SCOTTSDALE AT 740 AM...FOUNTAIN HILLS AT 755 AM DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS! AJ
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 Oct 4, 2:50 AM MST, 4 hours 39 minutes earlier.
Area forecast discussion, Oct 4, 2:50 AM MST, 4 hours 39 minutes before
AZZ020>028-CAZ030>033-041745- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 250 AM MST WED OCT 4 2000 .SYNOPSIS... A WEAKENING LOW PRESSURE SYSTEM WILL MOVE THROUGH ARIZONA TODAY. THE MAIN EFFECTS OF THIS SYSTEM WILL BE ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS...MAINLY DURING THE MORNING HOURS...AND SOME COOLING. A RIDGE OF HIGH PRESSURE WILL SLOWLY BUILD INTO THE REGION FOR A GRADUAL WARMING OVER THE WEEKEND. OTHERWISE...MOSTLY CLEAR NIGHTS AND SUNNY DAYS CAN BE EXPECTED THURSDAY THROUGH SUNDAY. .DISCUSSION... THE OLD CLOSED LOW OFF THE SOUTHERN CA COAST HAS NOW OPENED UP AND IS MOVING NEWD INTO SERN CA AND SWRN AZ...AND IS CAUSING ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS OVER WRN AND NRN AZ. A LOOK AT 00Z RAOBS AND GOES PWAT AND LIFTED INDEX IMAGERY SHOWS THAT MOST OF AZ IS RATHER MOIST AND UNSTABLE...WITH PWAT VALUES AT AND ABOVE ONE INCH. GOOD PVA...CONVERGENCE OF Q...MID LVL UVV...AND DIFLUENCE ASSOCIATED WITH THIS LOW...ALL OF WHICH ARE ACTING TO SPUR AN INCREASING AMOUNT OF SHOWERS AND STORMS SINCE MIDNIGHT. EXPECT ISOLD TO SCT SHOWERS AND STORMS OVER THE CWA TODAY...MAINLY DURING THE MORNING...WITH CLOUDS AND SHOWERS DECREASING FROM THE SW DURING THE AFTERNOON AS THE LOW MOVES NE. SHOULD SEE SOME COOLING AND LOCAL BREEZES AS WELL...WITH TEMPS INTO THE LOW TO MID 90S OVER MUCH OF THE DESERTS. LOW TO BE EAST OF THE CWA TONIGHT...FOR PARTLY CLOUDY TO MOSTLY CLEAR SKIES...AS DRIER SUBSIDENT AIR FILTERS ACROSS THE REGION. DRY SWLY FLOW ON TAP FOR THU FOR MOSTLY SUNNY SKIES WITH LITTLE CHANGE IN TEMPS...POSSIBLY UP SLIGHTLY DUE TO DRIER AIR IN PLACE. NO CHANGE PLANNED TO THE EXTENDED AS A DRY FLOW CONTS FRI THRU SUN. 11
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; radar from the NEXRAD Level II archive.