Alert archive / California / Flash Flood Warnings in 1998
Flash Flood Warning 22, NWS Sacramento, CA
NWS Sacramento, CA issued this flash flood warning at Aug 14, 1998, 3:09 PM PDT for El Dorado County, California. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 14, 1998, 3:09 PM PDT (22:09 UTC)
- Expired
- Aug 14, 1998, 5:10 PM PDT
- In force
- 2 hr
- Issued by
- NWS Sacramento, CA
- Area
- Whole counties
County El Dorado County, CA
The nearest sounding before it
Oakland, CA (KOAK), launched 12:00Z, 10.2 hours before the alert went out and 187 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
- 1659 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAC 142210 FFWSAC CAC003-005-009-017-109-150010- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SACRAMENTO CA 309 PM PDT FRI AUG 14 1998 THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL EL DORADO COUNTY IN NORTHERN CALIFORNIA EXTREME EASTERN AMADOR COUNTY IN CENTRAL CALIFORNIA WESTERN ALPINE COUNTY IN CENTRAL CALIFORNIA EXTREME EASTERN CALAVERAS COUNTY IN CENTRAL CALIFORNIA NORTHEASTERN TUOLUMNE COUNTY IN CENTRAL CALIFORNIA * UNTIL 510 PM PDT * SINCE 130 PM PDT... NATIONAL WEATHER SERVICE DOPPLER RADAR HAS INDICATED VERY HEAVY RAIN ALONG AND JUST WEST OF THE SIERRA NEVADA CREST FROM EAST-CENTRAL EL DORADO COUNTY SOUTH TO NORTHEASTERN TUOLUMNE COUNTY...STORMS ARE SHOWING LITTLE MOVEMENT. * PERSISTANT HEAVY RAINS IN THIS AREA FOR OVER THE PAST HOUR WILL LIKELY PRODUCE FLASH FLOODING OF CREEKS IN THE WARNING AREA. IN ADDITION HIGHWAYS 88...4.V..AND 108 MAY BE AFFECTED BY ROCKSLIDES AND HIGH WATER. MOVE TO HIGHER GROUND IF FLOOD WATERS THREATEN. DFR
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sacramento, CA wrote its last area forecast discussion before this flash flood warning went out at Aug 14, 3:01 PM PDT, 8 minutes earlier.
Area forecast discussion, Aug 14, 3:01 PM PDT, 8 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SACRAMENTO CA 300 PM FRI AUG 14 1998 VISIBLE ELEMENTS OF MONSOON MOISTURE FROM BAY AREA AND THEN SEWD ACROSS NRN SAN JQN VLY AND OVER SIERRA ARE SLOWLY MOVING NORTHWARD... BUT ARE ERODING AS THEY MOVE NWD OVER THE COASTAL RANGE N OF THE BAY AREA AND OVER THE VALLEY INDICATING MORE STABLE AIR IN THAT PART OF THE STATE. BUT NUMEROUS TRWS OVER SIERNEV WHERE AIR MASS IS MORE MOIST AND VERY UNSTABLE DUE TO HEATING. SLY FLOW AROUND THE UT HIGH FCST TO ADVECT MOISTURE NWD INTO SAT. THUS HIGH K-INDICIES FCST FOR THE NERN ZONES OF CA ON SAT AND A STRONG 7H THETA-E GRADIENT TO KEEP CHANCE OF TRWS FOR NERN ZONES AS WELL AS OVER THE SIERRA. BY LATE IN THE DAY ON SAT...5H FLOW WILL BECOME WSWLY OVER NORCAL AS THE ERN PAC TROF AXIS MOVES CLOSER TO THE CST. THIS WILL INHIBIT TRWS IN OUR WRN ZONES ON SAT AND KEEP THEM CONFINED TO THE CREST OVER THE SIERRA. MARINE LAYER DEEPENED SLIGHTLY OVERNITE AND SHOULD CONTINUE TO DEEPEN AHEAD OF THE TROF ON SAT. THE DELTA TRICKLE WE HAD TODAY WILL BE MORE SIGNIFICANT ON SAT AND SUN IN THE VLY AS THE TROF AXIS APPROACHES THE CST AND THEN MOVES OVER NORCAL ON SUN. SUU COOLED OFF SIGNIFICANTLY TODAY AND AND WOULD EXPECT COOLING INTO THE UPPER 70S ON SUN...THUS THE DELTA BREEZE IS COMING THIS TROF WILL SRPEAD DRIER AND MORE STABLE AIR OVER NORCAL AND THE SIERRA FOR QUIETER WX OVER THE MTNS ON SUN. THE MRF/EURO/UK ARE IN GENERAL AGREEMENT THAT A SIZZLING HEAT PUMP HIGH WILL BUILD OVER THE MIDWEST...KEEPING A TROF OVER/OFF THE CST THRU THE EFP PERIOD FOR DRY AND SEASONABLE WX OVER OUR FCST AREA. JHM STO...NONE. BLU BU 067/081 061/077 058 79210 RBL UU 070/099 066/095 062 79000 SAC UU 060/090 057/087 056 79000
The office that day
Everything else NWS Sacramento, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 2:21 PM PDT | Severe Thunderstorm Warning | STO | Alpine | 59 min |
| Aug 14, 3:09 PM PDT | Flash Flood Warning | STO | Alpine, Amador, Calaveras, Tuolumne | 2 hr |
Nearby
Flash Flood Warnings in California, 1998Every flash flood warning in 1998
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.